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-   -   Strange cooling system problem - exhaust gas entering system?? (http://www.peachparts.com/shopforum/tech-help/28208-strange-cooling-system-problem-exhaust-gas-entering-system.html)

msyoder 01-09-2002 05:40 PM

I must agree with Dave.

I have the OM603 engine and I've been there. Two and a half failed (on the same trip) last winter and nearly disabled the car. Luckily the ones that had to be changed coincided with the ones I COULD change. It was cold and I had places to go. It was a huge pain.

Consequently when the shut-off valve failed a month later I had them change out the remaining GPs while the (intake) manifold was off.

Please carry spare (80amp) GP relay fuses with you. If you let the GP nut and wire twist to the side (easy when changing the GP under the manifold) and touch the engine -- poof there goes the fuse. It was a 45deg day when it happened and my car would NOT start without glow plugs.

engatwork 01-13-2002 08:10 AM

I was wrong about it being normal
 
on the 300D. After reading/thinking about this thread for awhile I got out there and started nosing around under the hood. What I found was that if I opened the reservoir cap and squeezed the top radiator hose it actually felt and gave indications that it had air in it. In addition, I did not have the reservoir up to the "full" line and looking closely it seemed the top radiator hose was higher than the coolent level that I was running in the reservoir. I topped the reservoir up to the full line, squeezed the top hose alot to insure that it was full of coolant and now when it cools off there is absolutely no pressure in the reservoir just like some of you suggested on a properly working system. Oh yea, my aux water pump does not leak anymore either.

P.E.Haiges 01-13-2002 11:10 AM

GSXR,

I looked at my 603 engine and I agree that GP #3 and #4 look extremly hard to replace and I would agree to put new GP in those two ` if the intake manifold was off. However, I still would not replace any of the other 4 untill they failed. I would keep the 2 from #3 and #4 for spares.


Good idea about the GP relay fuse. They are so inexpensive from Fastlane that it doesn't cost much to carry a spare. I have never needed a GP relay fuse in 11 years and 170,000 miles but I still do carry a spare. I also carry a spare GP or 2.

P E H


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