AA Cylinders for Air-cooled VW - Problems & Rework
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- เผยแพร่เมื่อ 2 ต.ค. 2021
- A good friend of mine by the name of Steve Daniel of Daniels Machine Shop in Augusta, Maine pointed out to me a few years ago how the AA Cylinder kits were having problems with flash blocking the cooling fins. He also discovered a problem with the overall heights of the cylinders. Since then, I have been sure to check all aftermarket cylinder kits I have purchased, and I have also found the flash and height problems to be pervasive.
In this video I show what the flash problem is, how to correct it, and how to measure the heights.
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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.
Nice one 👍🏴
Thank you! Hope it was helpful
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!
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.
Mahle are after market as well . Vw didn't us mahle.
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?
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….
👍
Thank you!
Wouldn't be the case to turn the cylinder on a lathe?
No. Lapping it in is far more effective to maintain squareness parallelism
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
Mahle now uses AA cylinders with the logo ground off.
Interesting….
Wow,that sucks. 🙁
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
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.