A standard 2cv has a non return valve in the oil filter tube with a breather to the air intake. When you consider that the 2cv has piston Comming together then apart it results in significant pressure changes in the crankcase. A common cause of oil leaks on the split crankcase of the 2cv is a failed non return valve. I built a 2cv special in 79 and still drive it as a youngster of a near 83 years! Love your channel, long may you tinker.
Glad he kept his thumb on right side of starting handel with his fingers. A lesson I learnt to do at 15 years old after 6 months in a plaster cast, 55 years ago.
Great to see the Peugeot (not Salmson 🙄) at the NEC show yesterday, the Hall & Scott is quite something… Please keep up the videos, they are excellent 👍
I can't get enough of these videos. Susie, who ever is in the driving seat, you, and only you, know the way to Ivan's heart. What a team, the presentation is first class, well done everyone.
Fabulous content as ever, I knew very little about vintage sports cars, found the Shed Racing channel, I’m now hooked. It was a pleasure to meet Ivan and Suzie at Prescott, lovely friendly folk with time for everyone, super to see. And great to see my video clip of Ivan burning up the hill. Thanks for the tee shirt and the stickers, already in pride of place in my shed !
Every time you make a video you bring me pure happiness im grinning from ear to ear Thank you all Team Shed Racing for a great Prescott in good weather love the racing overalls Ivan WHAT A BLAST.
As usual a delight to watch and learn. I have some acquaintances from New Zealand running a Bentley in Portugal, you are sure to meet them they are great characters All the best
Fantastic! I'd never be able to go up the hill in my Model T speedster... When it stops flinging out oil it means I don't have any! Cheers from my shed
Brilliant plan and execution of the idea. Thank you for yet another great video. Glad you had a good day at the track,(No rain) and got to test the new parts set-up.
Another fantastic video, I know little about the mechanics of an aero engine,but it is so interesting watching your posts. Keep the channel going, Graham.
A non-return valve in the crankcase breather can sometimes cause problems. I don't think they apply to the Hall and Scott, but you should be aware: If the pistons and crankcase make an efficient pump (as they could on a single cylinder or a horizontally opposed two cylinder engine) the crankcase pressure can fall well below atmospheric and the oil pump (on a conventional sump) or scavenge pump (on a dry sump) are pulling against a partial vacuum, reducing their efficiency, potentially to zero. I heard from a first hand source (a very experienced engine designer) who had to diagnose a prototype horizontally opposed twin engine that was continually running its bearings, and it turned out that the vacuum in the sump was completely stopping the oil pump delivery at high RPM. Maybe it also tends to suck oil out from around the crank bearings? A vacuum relief valve should also be fitted to the sump, for safety. The main purpose of a PCV valve on a modern engine is to keep the crankcase pressure within a reasonable range.
Hi Ivan, Susie and John. Because I have road going vintage/post vintage cars I add a paper air filter. On the carb side of that I add a 1/2" pipe, with a flame trap (scrunched up pot scourer!), and pipe that to the rocker box. The vacuum in the crankcase stops the oil leaks 100%. Keep up the good work. Please do a video on crash box gear changing and driving on crossply tyres for me. Thanks for the great entertainment. Cheers Martin..
Hi Ivan.....the panhard twins have a timed valve under the distributor drive ...opens as the pistons come together and closed as they move apart. This makes sure the crankcase is negative pressure and keeps the oil in !
Nice bit of engineering on the new breather concept from all involved, it has given me some ideas for my old motorbikes! You continue to inspire me Ivan! Well done and a very interesting and jovial episode. Thanks, Paul 🤓
A PCV valve with diaphragm was fitted to the breather tube above the oil vapour separator from the crankcase....on a 1969 Wolseley 1300...with the coir filter in the oil filler cap providing the inward air. Always kept the "mayonnaise" out of the valve cover with a one way air flow through the engine.....
Early three wheeler Morgans had either no front brakes or weak ones. The reason for this was because a number of three wheelers were involved in accidents where the car flipped over. A number of drivers were killed or seriously injured. They solved the problem by putting the engine further forward. The extended front chassis would drag on the road, stopping the vehicle from flipping over. Really enjoy your films and rebuilding items. Graham Priest.Gpx
🇨🇦 It's called a PCV valve over here in the America's, Positive Crankcase Ventilation valve. They were introduced in the early 60's and replaced the "Road Tube" a baffled breather tube that exited below the car. 🇨🇦
Big old ship engines had clacker valves on the crankcases as well. At some engine speeds it almost sound as though the engine had hay fever sneezing away to themselves
Have a look in Dave Vizards A series book. I'm sure he goes into some detail about using a venturi in the exhaust and a check valve to deliberately create negative crankcase pressure.
A little mod which works very well…….we installed a reed valve and vacuum pump from I think an aquarium into the engine of a Yamaha race engine immediately it produced more power and never suffered from crankcase pumping …….result! 😎🚀
Multi cylinder engines normally balance out their crankcase pulses, except for ring blow-by. Single cylinder and boxer twin engines like BMW mc & 2CV have the worst case breathing. IMO reed valves work best, with your design ideal is very light valve flapper and very light spring required. The 70up BMW mc came with breather very similar to your design, it used a light phenolic (micarta) disc, this improved later with reed valve. Possibly another problem with HS is air sucked into engine by incomplete sealing. For example when F1 first discovered the importance of negative crankcase pressure, they used bigger scavenge pumps to achieve it, but then had to reverse the oil seals to prevent atmospheric air from entering crankcase. Keep up the great work!
You may want to study the crankcase breathers used on Offenhausers. They also suffer from high pressure in the crankcase due to the dimensions of the barrel design.
Evening team, the old 'Petter' single & twin air cooled & water cooled diesel engines used a small non return crankcase breather that used a thin flat rubber washer as the sealing valve 👌👍😉
1:35 Every vehicle should have a Marigold to indicate crankcase pressure! The Norton Dominator (my 650SS is a variant) had a timed valve on the end of the camshaft that connects externally (it was he norm to feed back into the oil tank) when pressure would be positive relative to atmosphere.
Just a thought Ivan, replace the brass disc and spring with a Reed made from a bit of very thin spring steel. Will be lighter and more responsive taking less crankcase pressure to lift. A lot of old stationary engines used a leather disc as the check valve so you could try that, couldn't be much simpler, just don't cut up your favourite Oxfords😂
You asked for it: "O, yeah. Moto Guzzi oil catch tanks have the valve." 😉 This valve is in the rocker box breathers only. The return pipe, from catch tank back to the sump is not valved. When the valve stops working, the engine throws it's oil out. I.e. It works....
A PCV has vacuum from the intake and on older cars some kind of breather to allow fresh air in. Modern cars don't have the breather since even a leak around the dipstick can mess up the ECU. In this case they just have a one way pressure relief valve with no vacuum.
I'm concerned that more vacuum in the crankcase will cause the manually applied valve train lube to be quickly sucked into the engine resulting in excessive valve train wear.
More likely to meet you on The Welsh Trial than the Algarve. Couldn't agree more getting old is a "bloody nuisance" but the alternative isn't very attractive.
"Will that fit in the van with that?" Why do women always come up with these awkward questions. My wife does this all the time Women's intuitions, possibly. What would we without them? 😂
The non-return valves look like a good idea. But there is a danger of it sounding like a team of horses galloping round the track with those plates Ivan!
A standard 2cv has a non return valve in the oil filter tube with a breather to the air intake. When you consider that the 2cv has piston Comming together then apart it results in significant pressure changes in the crankcase. A common cause of oil leaks on the split crankcase of the 2cv is a failed non return valve. I built a 2cv special in 79 and still drive it as a youngster of a near 83 years! Love your channel, long may you tinker.
Oil filler not filter
There's "tinkering", and then theres Ivan and Jon. ❤
It’s great to see young chaps like that Morgan owner, preserving the old stuff! That car is safe now.
Glad he kept his thumb on right side of starting handel with his fingers. A lesson I learnt to do at 15 years old after 6 months in a plaster cast, 55 years ago.
"getting old is a bloody nuisance" - priceless 🙂
And true.
But ..
The alternative isn't very attractive.
Great to see the Peugeot (not Salmson 🙄) at the NEC show yesterday, the Hall & Scott is quite something… Please keep up the videos, they are excellent 👍
I can't get enough of these videos. Susie, who ever is in the driving seat, you, and only you, know the way to Ivan's heart.
What a team, the presentation is first class, well done everyone.
Fabulous content as ever, I knew very little about vintage sports cars, found the Shed Racing channel, I’m now hooked.
It was a pleasure to meet Ivan and Suzie at Prescott, lovely friendly folk with time for everyone, super to see. And great to see my video clip of Ivan burning up the hill.
Thanks for the tee shirt and the stickers, already in pride of place in my shed !
Every time you make a video you bring me pure happiness im grinning from ear to ear Thank you all Team Shed Racing for a great Prescott in good weather love the racing overalls Ivan WHAT A BLAST.
20:50 What an awesome thing for these two guys to share their passion across generations.
Great to see 👍
As usual a delight to watch and learn.
I have some acquaintances from New Zealand running a Bentley in Portugal, you are sure to meet them they are great characters
All the best
Great film as always Ivan and Susie, need a film on the Bentley
Fantastic! I'd never be able to go up the hill in my Model T speedster... When it stops flinging out oil it means I don't have any! Cheers from my shed
Wonderful just to shake your hand and say thank you for my favourite channel!
And there’s Suzie over there! 😂😂😂
Brilliant plan and execution of the idea. Thank you for yet another great video. Glad you had a good day at the track,(No rain) and got to test the new parts set-up.
Another fantastic video, I know little about the mechanics of an aero engine,but it is so interesting watching your posts. Keep the channel going, Graham.
Splendid episode, Ivan. Thoroughly enjoyed this one! Best regards from Missouri, USA.
This episode is a knockout! It's got it all!
A non-return valve in the crankcase breather can sometimes cause problems. I don't think they apply to the Hall and Scott, but you should be aware:
If the pistons and crankcase make an efficient pump (as they could on a single cylinder or a horizontally opposed two cylinder engine) the crankcase pressure can fall well below atmospheric and the oil pump (on a conventional sump) or scavenge pump (on a dry sump) are pulling against a partial vacuum, reducing their efficiency, potentially to zero. I heard from a first hand source (a very experienced engine designer) who had to diagnose a prototype horizontally opposed twin engine that was continually running its bearings, and it turned out that the vacuum in the sump was completely stopping the oil pump delivery at high RPM.
Maybe it also tends to suck oil out from around the crank bearings? A vacuum relief valve should also be fitted to the sump, for safety.
The main purpose of a PCV valve on a modern engine is to keep the crankcase pressure within a reasonable range.
Excellent video Ivan. Great driving as well. That new suit looks smashing on you. Must have taken 30 years off your age!
I wish!
Great watch keep up the good work👍👍👍🌞🌞
Great result team. Loved the Morgan too.
Hi Ivan, Susie and John.
Because I have road going vintage/post vintage cars I add a paper air filter. On the carb side of that I add a 1/2" pipe, with a flame trap (scrunched up pot scourer!), and pipe that to the rocker box. The vacuum in the crankcase stops the oil leaks 100%.
Keep up the good work.
Please do a video on crash box gear changing and driving on crossply tyres for me.
Thanks for the great entertainment.
Cheers Martin..
Hi Ivan.....the panhard twins have a timed valve under the distributor drive ...opens as the pistons come together and closed as they move apart. This makes sure the crankcase is negative pressure and keeps the oil in !
yet another experience at Ivan's place and Prescott. Great stuff
Nice bit of engineering on the new breather concept from all involved, it has given me some ideas for my old motorbikes! You continue to inspire me Ivan! Well done and a very interesting and jovial episode. Thanks, Paul 🤓
At 16:39 I am literally your follower😁. It was an excellent day's motorsport.
Thank you for the tech problem solving and all of the Prescott footage!
Again brilliant stuff, thanks team.
Only Ivan could include a video of a blue glove madly waving, classic 😂
A PCV valve with diaphragm was fitted to the breather tube above the oil vapour separator from the crankcase....on a 1969 Wolseley 1300...with the coir filter in the oil filler cap providing the inward air.
Always kept the "mayonnaise" out of the valve cover with a one way air flow through the engine.....
Great idea, well executed as usual. That Morgan is a sweetie.
Excellent, as always !
Hey up mate nice work and a good video thanks
Early three wheeler Morgans had either no front brakes or weak ones. The reason for this was because a number of three wheelers were involved in accidents where the car flipped over. A number of drivers were killed or seriously injured. They solved the problem by putting the engine further forward. The extended front chassis would drag on the road, stopping the vehicle from flipping over.
Really enjoy your films and rebuilding items. Graham Priest.Gpx
BRILLIANT.
🇨🇦 It's called a PCV valve over here in the America's, Positive Crankcase Ventilation valve. They were introduced in the early 60's and replaced the "Road Tube" a baffled breather tube that exited below the car. 🇨🇦
Another wonderful entertaining video! Is there more to the story of your new friend with the purple hair!??? Cheers from Alberta Canada!
Big old ship engines had clacker valves on the crankcases as well. At some engine speeds it almost sound as though the engine had hay fever sneezing away to themselves
Have a look in Dave Vizards A series book. I'm sure he goes into some detail about using a venturi in the exhaust and a check valve to deliberately create negative crankcase pressure.
As I can see ivan got a nice romper suit 😁👍👍👍👍👍🛠
yes and on its first outing, got a few traces of oil and mud...
A little mod which works very well…….we installed a reed valve and vacuum pump from I think an aquarium into the engine of a Yamaha race engine immediately it produced more power and never suffered from crankcase pumping …….result! 😎🚀
Can I just sit in your workshop!!!
As you said Ivan, others will chime in...yep, my '67 MGB has a PCV as original
Multi cylinder engines normally balance out their crankcase pulses, except for ring blow-by. Single cylinder and boxer twin engines like BMW mc & 2CV have the worst case breathing. IMO reed valves work best, with your design ideal is very light valve flapper and very light spring required. The 70up BMW mc came with breather very similar to your design, it used a light phenolic (micarta) disc, this improved later with reed valve. Possibly another problem with HS is air sucked into engine by incomplete sealing. For example when F1 first discovered the importance of negative crankcase pressure, they used bigger scavenge pumps to achieve it, but then had to reverse the oil seals to prevent atmospheric air from entering crankcase. Keep up the great work!
You may want to study the crankcase breathers used on Offenhausers. They also suffer from high pressure in the crankcase due to the dimensions of the barrel design.
One way valves in breathers work well on classic British bikes. I've had one on my Norton for many years,
Amazing man😮😮😊 great video😊😊
Nice new snazzy suit!
Evening team, the old 'Petter' single & twin air cooled & water cooled diesel engines used a small non return crankcase breather that used a thin flat rubber washer as the sealing valve 👌👍😉
1:35 Every vehicle should have a Marigold to indicate crankcase pressure!
The Norton Dominator (my 650SS is a variant) had a timed valve on the end of the camshaft that connects externally (it was he norm to feed back into the oil tank) when pressure would be positive relative to atmosphere.
My BSA 1946 had a "clack" valve, vented positive pressure, closed under negative crankcase pressure. A similar idea.
Just a thought Ivan, replace the brass disc and spring with a Reed made from a bit of very thin spring steel. Will be lighter and more responsive taking less crankcase pressure to lift. A lot of old stationary engines used a leather disc as the check valve so you could try that, couldn't be much simpler, just don't cut up your favourite Oxfords😂
Or you could use a modern two stroke reed valve. They are very sensitive to pressure changes.
My favourite utuber 😊
It’s a nice pcv valve 🙂
The Hall & Scott is definitely a "work in progress" vehicle but development takes more than a few steps Ivan, keep powering on.
❤brilliant ❤
You asked for it: "O, yeah. Moto Guzzi oil catch tanks have the valve." 😉 This valve is in the rocker box breathers only. The return pipe, from catch tank back to the sump is not valved.
When the valve stops working, the engine throws it's oil out. I.e. It works....
Hahahahah. That glove looked like a ghost inside waving surrender.
They could charge a pound a time to be slapped by the Hall and Scott for charity.
Every modern car has a PCV ……the vented pressure recirculates into the intake .
A PCV has vacuum from the intake and on older cars some kind of breather to allow fresh air in. Modern cars don't have the breather since even a leak around the dipstick can mess up the ECU. In this case they just have a one way pressure relief valve with no vacuum.
I’d probably use a reed valve block from a big two stroke motorbike. Less likely to come to bits and silent as well.
"Bit of fun trying it" That's what keeps the nation's men in sheds from going insane.
I'm concerned that more vacuum in the crankcase will cause the manually applied valve train lube to be quickly sucked into the engine resulting in excessive valve train wear.
I find that hard to believe too.
never had a red flag before? 16:28 "I find that hard to believe..."🤣
Ivan lapp the brass disc for a better seal
I have the same problems with my sump too.... i blow the gaskets all the time!!!
Hi guys love the channel, where can I buy a t shirt
please email us at shedracing@outlook.com
A very Large PCV valve
Ivan,have you thought of a non metalic breather valve? A metal one would give you a noise when working.
Rubber?
@@JohnSmith-pl2bk Rubber like conveyer belt or similar.
More likely to meet you on The Welsh Trial than the Algarve.
Couldn't agree more getting old is a "bloody nuisance" but the alternative isn't very attractive.
👍🇦🇺
It's Hall-Scott. Not sure why Ivan keeps calling it ' Hall & Scott'.
Habit
Ivan what's happened to the new artwork.... fallen out with the artist..?
The artwork is our new logo - not the video intro
"Will that fit in the van with that?" Why do women always come up with these awkward questions. My wife does this all the time
Women's intuitions, possibly. What would we without them? 😂
Then you jiggle this bit and tickle that , release the dogs and you're off to the races ! TT FN !
The non-return valves look like a good idea. But there is a danger of it sounding like a team of horses galloping round the track with those plates Ivan!