Date registered: Jun 2004
Vehicle: 1984 w123 230ce
Location: Leic, UK
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RE: w115 oil pressure...
thanks for the reply... I brought the car cheap as the engine wouldnt start. I replaced the battery and away it went, but there was a terible screaching noise, similar to a really knackered alternator/waterpump, which I tracked down v.quickly (like 30sec's) to the top end; there was no oil getting to the cam-shaft/valve-stems and I think the top end may have siezed which is initially why it wouldnt start. I poured some oil over the cam shaft, started it up and the screaching went away (engine ran like a dream). I have inspected the top end and everything seems to be in good shape and running freely.
I have checked if there is any oil mist in the top of the engine, and there isnt. The tube which runs oil over the cam shaft is clear and not cracked, and the galleries seem to be open. I stripped the oil pan/pump and that seemed to be fine, and is turning correctly with the engine and pumping oil. I have stripped the oil filter head and that appears to be working correctly. I replaced the filter as the one fitted was really old (prob 10000miles or more) and re-ran the engine, then removed the oil filter again... there was no oil reaching the filter, so I removed hoses one at a time from the oil cooler to check for oil-flow. There is oil flow at the one hose (from filter head to cooler) but not at the return hose (cooler to filter head) so I think the issue might be a blocked cooler (it looks like the original one from 1972). I am guessing its blocked so bad that the oil is not passing through the cooler, back to the oil filter head (where the line to the oil pressure gauge is... ...which is working fine; I checked with an air line) and up to the top end of the engine
My plan now is to rig something between the hoses to bypass the cooler, and then run the car to see if that sorts the issue.. ..I dont want to shell out on a new cooler, as the only place I can find one is MBUK and they want Ã‚Â£430+vat!!!..
I am thinking if the oil cooler is the culprit, I will either get one from a breakers and flush-it/re-paint it, or get an std aftermarket one (mocal or similar) and fit infront of the radiator at the bottom of the grille rather than replace with a Ã‚Â£500 part!
Any further thoughts greatly appreciated