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B6304 ticking/knocking sound...

Nick

Nick

New member
Joined
Jan 31, 2004
Location
Winter Park, FL
So lately I've noticed my 960 has an interesting set of issues. The guy that started this thread: http://forums.turbobricks.com/showthread.php?t=54058 describes the issues I'm having perfectly. I've gone through and done all the possible little tricks (marvel mystery oil, 4000rpms, thicker oil, etc. etc.) to try and remedy this issue but have not been able to figure it out. To be perfectly honest, it seems like rod knock at first. You start the car and theres an audible tap tap tap tap.... and even with the mechanics stethoscope it seems to be coming from the lower end (cylinder 1). Whats interesting though is that once at operating temperature, it almost dissapears. The motor revvs smoothly and there is only a faint sound that appears at idle. I do get a little smoke upon takeoff sometimes like that other poster, but it seems to be an unrelated issue (motor has 160k). I really want to say its lifter noise, but I've not had the stethoscope lie very often. I took the car on a trip to boca raton the other day (400 miles) and there was no issues at all. It drove like a dream and got good gas milage.

Anyone with a 960/*90 having any similar issues? I could look for a lower mileage long block, but I really don't want to bother with that kind of stuff right now. I'm just too busy between work and school.
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wow so you are getting smoke sometimes and the engine only has 160K on it? hmm smoking allready is kinda unheard of i mean hell my car has almost 250k on the engine and no smoke ever.i am running the Mobil-1 full synthetic 10w30
 
My 960s engine makes the exact same noise @ 64,000 miles. Sounds exactly like lifter noise, but debatable whether it is or not. Mine will smoke on startup depending on the last time it was ran, sometimes quite badly.

You engine sounds like it's in better shape then mine if your gas mileage is good. I've tested the compression on my engine and it was terrible... Currently looking for a new engine. :-( I hope you can figure out your problem! I'd really like to know what is causing the knock as well.
 
My son's 89 740 GLE 16V made an unpleaseant noise like that. I ran a quart of Gunk engine flush though it and it shut up and stayed that way. It is not recommended for turbo applications, but it worked fine on the B234. Your results may vay.
 
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