Diagnosis help - Cold Lash Adjustment??
Posted: Wed Nov 25, 2009 2:48 pm
Hi guys,
My 98 NB8A has developed a noise which I believe is the 'ticking' of lifter clearances being incorrect. This is just my internet diagnosis as I have sweet flower all knowledge of engine internals. To me it sounds like someone pouring a small cup of water onto the floor but a little more mechanical (if that makes sense?). Research led me to use the ticking term but I don't want to throw ppl down the wrong path.
I had my engine replaced earlier this year with another stock BP-4W. Papers say 69,000kms done (if you believe that). Ran like a dream until recently I would hear the sound only during the first two gear changes or so when the engine is still cold and disappears afterwards. For instance, I could rev it up to 3k rpm once in the morning just in my garage to iron out the noise and it wouldn't make a noise for the rest of the trip. Lately I noticed it's getting louder (not LOUD) and it lasts a bit for longer - maybe the first 3-4 gear changes.
There's recommendations for HLA's to use lighter oil but the NB8A has solid lifters so I don't see how that would help. I currently use magnatec 10w-40, don't track it, and yes, there's enough oil
1. Has any NB's had to adjust theirs after 70k kms and is it difficult to do? My old engine made it up to 95k kms with no ticking.
2. What happens if I leave it?
Pat.
My 98 NB8A has developed a noise which I believe is the 'ticking' of lifter clearances being incorrect. This is just my internet diagnosis as I have sweet flower all knowledge of engine internals. To me it sounds like someone pouring a small cup of water onto the floor but a little more mechanical (if that makes sense?). Research led me to use the ticking term but I don't want to throw ppl down the wrong path.
I had my engine replaced earlier this year with another stock BP-4W. Papers say 69,000kms done (if you believe that). Ran like a dream until recently I would hear the sound only during the first two gear changes or so when the engine is still cold and disappears afterwards. For instance, I could rev it up to 3k rpm once in the morning just in my garage to iron out the noise and it wouldn't make a noise for the rest of the trip. Lately I noticed it's getting louder (not LOUD) and it lasts a bit for longer - maybe the first 3-4 gear changes.
There's recommendations for HLA's to use lighter oil but the NB8A has solid lifters so I don't see how that would help. I currently use magnatec 10w-40, don't track it, and yes, there's enough oil
1. Has any NB's had to adjust theirs after 70k kms and is it difficult to do? My old engine made it up to 95k kms with no ticking.
2. What happens if I leave it?
Pat.
Also a mechanics stethoscope might work, especially when you get close. 