Quicksilver
Member
- Joined
- May 25, 2001
Exhaust valve damage
- Thread starter Quicksilver
- Start date
mikestertwo
Well-Known Member
- Joined
- Sep 13, 2006
turbodave231
Moderator
- Joined
- May 24, 2001
I've never personally had this type of failure, but the condition you are looking at is called "channeling" or "guttering". It can be caused by localized hot spots in the combustion chamber. Hard carbon deposits or anti-knock additives contribute to this condition.
Did you find any unusual deposits in the combustion chambers?
Dave
Did you find any unusual deposits in the combustion chambers?
Dave
Has anyone experienced damage like this before?
Does this count? LOL
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Quicksilver
Member
- Joined
- May 25, 2001
These valves are from a natural gas fueled, spark ignited, turbocharged large bore industrial engine. so no additives. the spark plus and combustion chamber were both covered with what appears to be "weld splatter". The top of the piston shows signs of Melting around the top edge but the rings were not wasted YET!
Quicksilver
Member
- Joined
- May 25, 2001
GSTOY,
That sure looks like the same type of failure. Was that from your engine? Was that from a 1/4 mile blast or a extended top end run?
That sure looks like the same type of failure. Was that from your engine? Was that from a 1/4 mile blast or a extended top end run?
