Wear on cylinders

[Zalb]

Hello everyone. I spotted an oil leak in the pushrods of my Revmaster 2100T and decided to pull one of the heads off. Unfortunately, I found the following scenario: the two cylinders were completely scratched. The engine has only 100 hours. Most mechanics think it could be related to excessive temperature in the cylinders. What do you think?

 

[Chucker]

Here is a good read that may help:

https://www.aircooled.net/vw-engine-piston-cylinder/

 

[Chucker]

I would also recommend sharing your photos with Joe Horvath at Revmaster.

[email protected]

 

[Flyguyeddy]

What kind of cooling baffles are you running? Are the exhaust fins included in your baffle?

 

[Zalb]

I would also recommend sharing your photos with Joe Horvath at Revmaster.

[email protected]

Thanks Chucker, I have already contacted Joe but he did not give me a response.

What kind of cooling baffles are you running? Are the exhaust fins included in your baffle?

I don't know what do you mean eddy (english is not my native language). I do have cooling baffles, but I don't really know what exhaust fins are.

 

[Flyguyeddy]

The area around the exhaust port has cooling passages there. They should be included in the cooling baffles. That is the hottest part of the vw head

 

[mhflyit]

What CHT's were you seeing and where are the sensors located - spark plug or head bolt?

 

[Zalb]

What CHT's were you seeing and where are the sensors located - spark plug or head bolt?

The CHT is located in the highest temp cylinder, at the spark plug. I did not seen abnormal temperatures.

 

[ddoi]

After reading that article, it seems like the piston ring end gaps may have been too small on those piston/cylinder assemblies. Can you measure the ring end gaps? Can you post pictures of the pistons and rings?

Hopefully you'll hear from Revmaster soon.