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Valve Clatter or ticking
Hi Im a newbie here, but did try a search for my issue before bothering you guys ( Valve noise, valve, clatter etc).
I have a 1989 626 ( non-turbo) 4 cyl, with 127,000miles. Car was running fine before sitting for about 1 week. Had my daughter start the car and it ran and idled fine, had her shut of the car and restart, then heard a loud ticking or clattering noise. The noise frequency increases when we accelerated slightly. Have started the car several times and noise is constant. Used a long handled screwdriver to try to determine where on the engine noise is coming from, and think it is arouind the #2 cyl intake valve. My question is are valve problems ( sticking), or timing belt problems common on these cars? Has anyone had this or a similar problem? Any recommendations on how to proceed with diagnosis, and then repair? just want to save time effort and $ , so any tips appreciated. |
'Sounds entirely possible. That or a chunk of carbon is holding things up in there. But w/o actually being there, it is hard to know what it is you are hearing. How's the oil? I am not aware of any serious timing belt issues with these cars, and if it seems to be only one cyl in the middle of the block then I think you could rule that one out. You may just have to go a little deeper on your own. e.g. remove the valve cover and start the car, but drape a rag (or two) over the exposed head so oil doesn't splash every where as it's running. |
Sounds like the HLA's just bled down. I have had good luck with Marvins marvelous mystery oil in the crankcase to flush them out. About 4 bucks a bottle. A bottle of Techron in the gas tank could'nt hurt either.
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Valve cover
Thanks Virgin1 and hixx. The oil looks fine, (recent change). I'll pull the valve cover off on Monday and give it a look to see what I can see. I may run it if there's nothing obvious. I'll post a picture if I find anything.
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You're welcome. While I have never tried it personally I have known a number of people that swear by Marvel's Mystery Oil. It can be used in an almost infinite number of ways it seems. In the '80's when I was still in the business, we had a rotory supercharged BMW 2002 and we used MMO as a supercharger lubricant. I also know of those that swore using it as a valve cleaner by slowly pouring it down the throat of the carburetor w/the engine running, but I would not recommend trying that in a modern FI car, so please don't go there. Though rather old-school, it just might be your answer here too. |
Marvel mystery oil
I think I'll still pull the valve cover first. I am very curious to see if I can see whats sticking, but also if there is something broken I want to find it fast and not run the risk of more damage.
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Cover off
4 Attachment(s)
OK got the valve cover off, pulled the coil wire and began bumping the motor through a revolution or two, checking each rocker for play. Bingo found an exhaust valve (on cyl 2 I think its 2) with play. Here is a shot of the whole valve train and the suspect part.
Attachment 149 Attachment 150 Attachment 151 It looks as though there is a little insert in the end of rocker that is moving back and forth. Bad Hydralic lifter? OK next question How to replace ?Attachment 152 |
Remove the rocker assembly and pull the HLA out with pliers but it may not need one if it got a little trash/carbon in it and just bled down since it sat a week. Pumping them back up requires holding the rpm at 2000 for 2 minutes.
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Thanks but 2 questions
Questions removed
Hixx you nailed it! Put it back together ran it up to 2000 rpm and after a couple of min running smooth and quiet. I'll probably put a little trans fluid in the cracnk case, run it a little then do an oil change, just to clean things out. Thanks for the tip, you saved me from myself ( love to tear things apart). |
Still ok
a week after sitting still ok.
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