Fiat 126 Chat > Fiat 126 Mechanical Problem Solving

Avoiding burnt valves?

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phreak97:
I’ve just done some head work on my 1990 air cooled after losing compression on my second motor. I discovered both motors plus my parts motor had heavy pitting on the exhaust valves which caused leaks.

Is this a well known issue on these cars? Is there any preventative?

Xylaquin:
Could it perhaps need some lead replacement additive?

phreak97:

--- Quote from: Xylaquin on March 20, 2019, 10:11:18 PM ---Could it perhaps need some lead replacement additive?

--- End quote ---

Possibly, I thought that affected the seats but I guess both?

126Simon:
Running lean resulting in high combustion temps?

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phreak97:

--- Quote from: 126Simon on March 31, 2019, 07:40:35 AM ---Running lean resulting in high combustion temps?

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--- End quote ---
I don’t think so, it’s happened on three different engines (and carbys). one wasnt even from my car.

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