I just noticed that on the new 90.5 AA cylinders I bought, too. I’ll be taking your lead, on cleaning up the casting. Even more disturbing is the variation in barrel length. I’ll probably face the surface that mates to the case, on my lathe. It just shows, you can’t assume new parts are ready to assemble. New subscriber, Tony B👍
Hi Tony, thanks for watching! It’s really too bad, but you’re absolutely right. We can’t just assume new parts are within spec anymore. It’s not just the Aircooled VW world either. Classic American Iron is in the same boat. We need to support American and European manufacturing.
When you say flashing I assuming you are talking about that stuff that is in between the fins. That is from the casting production process. I would be worried about damaging my cylinder. I would try it with a hand file instead. Thanks for the suggestion. When I disassemble my engine I will check this.
Yes, that’s exactly what I’m referencing. You won’t hurt the cylinder in any way using the disc like I do, so long as you have a good hand control. A thin file will take an extreme amping of time because the flash is very heavy on most of these new cylinders
Whats the variation on deck height of block centerline? With rod variation and piston variation, I've never had a problem matching cylinders and rods to get deck height where it needs to be.
Just curious, why wouldn't you just put the two cylinders that are the same on one side and then us appropriate shims to even the heights of the others instead of lapping? Good information, thanks!
This is the difference between an engine assembler and an engine builder. 💪💪💪💪💪
I just noticed that on the new 90.5 AA cylinders I bought, too. I’ll be taking your lead, on cleaning up the casting. Even more disturbing is the variation in barrel length. I’ll probably face the surface that mates to the case, on my lathe. It just shows, you can’t assume new parts are ready to assemble.
New subscriber, Tony B👍
Hi Tony, thanks for watching! It’s really too bad, but you’re absolutely right. We can’t just assume new parts are within spec anymore. It’s not just the Aircooled VW world either. Classic American Iron is in the same boat. We need to support American and European manufacturing.
When you say flashing I assuming you are talking about that stuff that is in between the fins. That is from the casting production process. I would be worried about damaging my cylinder. I would try it with a hand file instead. Thanks for the suggestion. When I disassemble my engine I will check this.
Yes, that’s exactly what I’m referencing. You won’t hurt the cylinder in any way using the disc like I do, so long as you have a good hand control. A thin file will take an extreme amping of time because the flash is very heavy on most of these new cylinders
Whats the variation on deck height of block centerline? With rod variation and piston variation, I've never had a problem matching cylinders and rods to get deck height where it needs to be.
Going to check my 92MMs rn!
Just curious, why wouldn't you just put the two cylinders that are the same on one side and then us appropriate shims to even the heights of the others instead of lapping? Good information, thanks!
Have you tried making a .0015 shim?
Wouldn't be the case to turn the cylinder on a lathe?
No. Lapping it in is far more effective to maintain squareness parallelism
Mahle are after market as well . Vw didn't us mahle.
Nice one 👍🏴
Thank you! Hope it was helpful
I found the AA barrels and pistons are closer than Mahle .
In todays market you may be right! The days of really high quality parts for these engines is fading fast….
Nice video thank you!
I appreciate your comment! Thank you and I hope it helped!
@@MaineMachinist your welcome, do
You have a video in regards to lapping cylinders to length? Thanks again!
Your very trusting in the flatness of your bench or am I missing something?
That’s a precision granite table. It’s flat to .0003” over the entire surface
They’re used specifically in machine shops like mine for doing inspection work
👍
Thank you!
Mahle now uses AA cylinders with the logo ground off.
Interesting….
Wow,that sucks. 🙁
The height difference is nothing new. That was also evident with factorry stuff.
This is industry an standard operation for performance builders.
It absolutely matters whether the heights are matched or not
@@MaineMachinist Absolutely. I was just saying that the issue is not new. It has been so in the 30 years i have worked with ACVW & Porsche.
NPR / Cima the good old days
Yep I miss those days. I’m getting increasingly frustrated with the air cooled hobby because of the lack of good parts