http://forums.turbobricks.com/showthread.php?t=34987
SO, something in my head screwed up today.
The history is: I stopped at the post-office to fetch and drop someting off, and 5 mins. later when I was done and started the car again, it ticked insanely instantly after startup. That noise wasn't there when I stopped.
So I think, "**** **** **** **** valve shim on the run", decide to not give a ****, cause I'm not popping the hood at the post-office, in front of a whole crowd. I drive home, it runs fine on all cylinders, nothing strange except the ticking/clacking. At home I immediatly pull the head cover, and look at the shims...none missing. WTF? I then pull the cam, and hey presto!, the exhaust valve bucket on cyl#4 stops 5mm lower than the others...
What could cause this?
1. Bent valve? (WTF? how's that possible?)
2. Loose valve seat? (After 2 years of running, 10000kms? Oh noes! 3 angle valve job gone!)
3. Valve stuck in valve guide? Due to extreme carbon-buildup? (Ehhh......)
4. Valve spring has worn into head, due to lack of spring seats etc.? (Ehhh2......)
hmm.....Guess I'll find out when I yank the head, but just wanted to figure this out now....so I can get some sleep.
-EDIT-
531 head, double valve springs
SO, something in my head screwed up today.
The history is: I stopped at the post-office to fetch and drop someting off, and 5 mins. later when I was done and started the car again, it ticked insanely instantly after startup. That noise wasn't there when I stopped.
So I think, "**** **** **** **** valve shim on the run", decide to not give a ****, cause I'm not popping the hood at the post-office, in front of a whole crowd. I drive home, it runs fine on all cylinders, nothing strange except the ticking/clacking. At home I immediatly pull the head cover, and look at the shims...none missing. WTF? I then pull the cam, and hey presto!, the exhaust valve bucket on cyl#4 stops 5mm lower than the others...
What could cause this?
1. Bent valve? (WTF? how's that possible?)
2. Loose valve seat? (After 2 years of running, 10000kms? Oh noes! 3 angle valve job gone!)
3. Valve stuck in valve guide? Due to extreme carbon-buildup? (Ehhh......)
4. Valve spring has worn into head, due to lack of spring seats etc.? (Ehhh2......)
hmm.....Guess I'll find out when I yank the head, but just wanted to figure this out now....so I can get some sleep.
-EDIT-
531 head, double valve springs