When your looking up a cam most of them say they won't work in a 396 you'll need a grooved rear journal so that should get a fella thinking you'd think.
The 68 and newer blocks don't need the groved journal in the cam. The earlier blocks needed the groved journal with the 3 hole bearing. The 68 and newer blocks need the 1 hole bearing positioned @6 o'clock. You can still use the groved cam in the newer blocks but it is not nessary like the earlier blocks . That's why when you look for a new cam none of them have the groove. If you find a cam you want for the earlier block you can just have the groove machined into it.
I put a 68 and later cam in a 65 396 once and it didnt have the grove and I was unaware of that and we couldnt get oil to the rockers but we shut it down and pulled the cam and saw the difference and I had a grove machined in the cam and put it back together and no issues lucky.
The guy I bought it from was so bummed his build didn't work. He gave up and sold it. It was a great find. Just had to clean it out and get a new cam .
In most cases yes your correct. The wrong Cam Bearing had too many holes in it. They changed the oil passage on the block in 68. The oil never went up the pushrods on the last three
@@Rudedog75 Yes it is splash lubricated . From the top and bottom. The oil never went up the rear pushrods so it never went down to drip/splash on the cam. The last 3 cam lobes were starved from oil. The guy i bought the engine from said it didn't start ticking for at least 1000 miles.
@@Rudedog75Yes I understand the basic concept of splash lubrication. . So you're saying the wrong rear Cam Bearing had no affect on the last 3 lobes of the cam wearing out ? Did you see the difference in the cam bearings in the video?
Yes metal was everywhere . Definitely lot's of cleaning. I didn't replace the rings. I sprayed brake cleaner to "high pressure" clean out most parts.The crank wasn't to bad. I polished it with a piece of oiled up 1500 and a shoe string. It's not perfect but it works if you keep it even.
What are your thoughts on the situation? Why did it fail ? Ever since the bearing was replaced. The engine runs great and has 35 psi oil pressure at idle. The oil pressure before was 10 at idle . All that was changed was the rear cam bearing
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darn good info,on bearing,,,,beautiful final reveal and mechanics ingenuity my good man.🍻 🍻 for you.
Thanks! I'm glad you enjoyed the video. I'm gonna try to make one every day this week .
When your looking up a cam most of them say they won't work in a 396 you'll need a grooved rear journal so that should get a fella thinking you'd think.
The 68 and newer blocks don't need the groved journal in the cam. The earlier blocks needed the groved journal with the 3 hole bearing. The 68 and newer blocks need the 1 hole bearing positioned @6 o'clock. You can still use the groved cam in the newer blocks but it is not nessary like the earlier blocks . That's why when you look for a new cam none of them have the groove. If you find a cam you want for the earlier block you can just have the groove machined into it.
I put a 68 and later cam in a 65 396 once and it didnt have the grove and I was unaware of that and we couldnt get oil to the rockers but we shut it down and pulled the cam and saw the difference and I had a grove machined in the cam and put it back together and no issues lucky.
Good thing you caught it right way. It took me a couple weeks to clean this one out. Along with all the new bearings. Definitely a costly mistake.
So lucky they pulled it apart. Poor flat tappets.
Yes definitely! Stop running it if it's ticking.
yup, been thru that myself.
The guy I bought it from was so bummed his build didn't work. He gave up and sold it. It was a great find. Just had to clean it out and get a new cam .
Flat lobes have nothing to do with the rear cam bearing!
In most cases yes your correct. The wrong Cam Bearing had too many holes in it. They changed the oil passage on the block in 68. The oil never went up the pushrods on the last three
The lobes on the cam are splash lubricated unlike the pushrods that are pressure lubed.
@@Rudedog75 Yes it is splash lubricated . From the top and bottom. The oil never went up the rear pushrods so it never went down to drip/splash on the cam. The last 3 cam lobes were starved from oil. The guy i bought the engine from said it didn't start ticking for at least 1000 miles.
Incorrect, the majority of cam lobe oiling is from splash lubrication from the spinning crank/rod assembly!
@@Rudedog75Yes I understand the basic concept of splash lubrication. . So you're saying the wrong rear Cam Bearing had no affect on the last 3 lobes of the cam wearing out ? Did you see the difference in the cam bearings in the video?
did the crank have to get cut or polished? And after the honing did u get new rings too? seems alot of metal get thru everything.
Yes metal was everywhere . Definitely lot's of cleaning. I didn't replace the rings. I sprayed brake cleaner to "high pressure" clean out most parts.The crank wasn't to bad. I polished it with a piece of oiled up 1500 and a shoe string. It's not perfect but it works if you keep it even.
Those lobes ARE horrible and that bearing had nothing to do with it.
What are your thoughts on the situation? Why did it fail ? Ever since the bearing was replaced. The engine runs great and has 35 psi oil pressure at idle. The oil pressure before was 10 at idle . All that was changed was the rear cam bearing
Can you rebuild mine
I wish I had the time