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NG900 & OG9-3 Workshop NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible Technical Forum

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  #1  
Old 25th September 2007
screamingreen97 screamingreen97 is offline
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Default vlave train noise

okay so im down to this....my nechanics say that valve train noise is fine for now because the head has just been rebuilt and everything has to get worn in.


anyways...the valve train noise only starts after it reaches normal operating temp....any suggestions?
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  #2  
Old 25th September 2007
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NahumCC NahumCC is offline
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Air still in the lifters possibly. How long has this been going on. If its only been a short bit give it a little more time before you suspect you have bad lifters or insufficient oil flow.
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Old 25th September 2007
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If it was the other way around it would make sense. There's a check ball that holds oil for the lifter upon startup, if they get clogged the oil will drain and the lifter will make some noise upon startup the next time but not the other way around?
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Old 25th September 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by NahumCC
Air still in the lifters possibly. How long has this been going on. If its only been a short bit give it a little more time before you suspect you have bad lifters or insufficient oil flow.

its been about 200 miles since i got the car back....how would the air get out of the lifters? should i change to a thicker oil? or use seafoam?



and yes its after warm up....i know, weird....
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Old 25th September 2007
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I had the same problem after I replaced the head gasket. New lifters did not fix the problem either. What did fix it was replacing the cam chain tensioner, seems it was leaking oil through the tensioner and taking flow and pressure away from the lifters. The oil supply galleries for the tensioner and inlet lifters are very close together.
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Old 25th September 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by Presto
I had the same problem after I replaced the head gasket. New lifters did not fix the problem either. What did fix it was replacing the cam chain tensioner, seems it was leaking oil through the tensioner and taking flow and pressure away from the lifters. The oil supply galleries for the tensioner and inlet lifters are very close together.
cam chain tensioner???? u mean the timing chain tensioner?
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Old 25th September 2007
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Timing chain cam chain same thing. The tensioner is at the back of the head. Can simply be unscrewed, just be careful not to lose the small plastic piece in the end of the tensioner. You will have to remove the serpentine belt and pulley to get to it.
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Old 25th September 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by Presto
Timing chain cam chain same thing. The tensioner is at the back of the head. Can simply be unscrewed, just be careful not to lose the small plastic piece in the end of the tensioner. You will have to remove the serpentine belt and pulley to get to it.
ive unscrewed it before with the belt on lol...i have small hands...i guess ill try it with another one from my friends 900 while his car is down...would too much oil in the engine do it too?

i know the tensioner isnt leaking oil...but maybe the adjustment is out of wack since i had it laying in a box for a while
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  #9  
Old 25th September 2007
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I doubt too much oil would be the problem and the tension on the tensioner resets automatically. When I said the tensioner may be leaking oil I meant back into the engine by passing through the tensioner. The tensioner is a mechanical/hydraulic unit.
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Old 25th September 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by Presto
I doubt too much oil would be the problem and the tension on the tensioner resets automatically. When I said the tensioner may be leaking oil I meant back into the engine by passing through the tensioner. The tensioner is a mechanical/hydraulic unit.

ooo, aight, i am hoping you are right about this...if not, im dropping my oil pan and seeing if my pick up screen is clogged up...oil pain has leaks around it, wanted to fix that any ways
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  #11  
Old 26th September 2007
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Sending a PM.
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