Hi all,
I've just fitted a 200Tdi motor into my 90, complete with Allisport intercooler. The question I have is, while dring normally, ie 10 miles of A roads, the oil pressure reads 45-50 psi. However on a v long run
30+ miles or when towing the oil pressure drops as low as 35psi. Now as I write this the differnce seems negligable but it is very disconcerting when you see the oil pressure edging downwards when you've got 2 tonnes or weight on the back heading out for a days trialling! So, has anyone else got an oil pressure gauge in their 200 so I can compare these values? I suspect, if the gauge is accurate, that the oil may be wrong for the engine, getting thinner and thinner and altering the pressure. It's Granville 15W/40 and although I was assured it met the spec i;m not so sure now, any ideas on that one? Also does anyone think that the oil temp thermostat may be dodgy, I only ask because I had my sticky fingers in there while I had the engine out! Any suggestions greatfully recievedDave