Quote:
Originally Posted by New2MB
I've been working on getting my engine (603) running again and recently decided to purchase a used IP as mine wasn't pushing fuel out of one of the DV's.
About a week ago I was cranking the car over and everything sounded great, no unusual noises.
Then I got the new used IP and installed it and at the same time I remembered that I had not primed my new timing chain tensioner so I did that as well.
I also installed a new output shaft seal on the transmission but this noise isn't coming from that area and I can't see any way that it is connected.
So today I got everything back together and cranked it over and I hear a hollow metallic sort of scraping with maybe a slight clangning. The noise is completely inconsistent, sometimes it goes away completely, sometimes it gets to the point where I think I should stop cranking. But there doesn't seem to be any relation to where in the rotation of the engine the noise occurs.
It's definately coming from the engine but I can't tell where, I tried listening for it on a mechanics stethascope that was touching the timing cover. The funny thing was that the noise was not very pronounced with the stethascope in my ears, it was much easier to hear without it which makes me think perhaps it is not internal to the engine.
I pulled the valve cover and I don't see anything out of the ordinary nor can I hear the noise any better with the cover off.
I'm not even sure where to look next but I figure it must either be related to the chain tensioner or the vac pump or some combination of the two.
Any ideas?
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I'm getting the same noise almost word for word out of my 617 in the 81.
I was going to post and ask about it but had no idea how to word it. I also pulled valve cover, vacuum pump and belts. The stethoscope was of no use on mine either. The noise comes from low in the block no rhythm almost like a chain on a ten speed when you pedal it backwards only more pronounced.
Through lots of searching I came across one on the oil pump chain getting slack. The outcome was a broken chain and a destroyed engine.
Not sure if the 603 has a chain on the oil pump but that's what I started searching the forum for on my 617.
The only symptoms I found where on the thread with the damaged engine.
The noise was present and they noticed the oil pressure gauge dancing around.
I wish I could remember the thread.
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