Darren Groves Posted March 22, 2017 Report Share Posted March 22, 2017 So new, rebuilt engine in and it starts, oil pressure light stays on, so switch off quickly. Get out of the car to find it's dumped a load of oil which looks to have come from the pressure relief valve. The valve was definitely done up tight, so must have been under some pressure for it to leak past the copper washer. What do we think the problem is? Darren Link to comment Share on other sites More sharing options...
Clive Posted March 22, 2017 Report Share Posted March 22, 2017 You have got to take the valve off and inspect, or swap for another. Link to comment Share on other sites More sharing options...
Darren Groves Posted March 22, 2017 Author Report Share Posted March 22, 2017 You have got to take the valve off and inspect, or swap for another. Thanks for the reply Clive. My original post was done very quickly as I had to go off somewhere, so was going to add that I have another valve from the engine that I have just taken out, so a known good one, that I was going to try. Just wondered if a faulty valve would give way and dump what was a fair bit of oil or could there be anything else that might cause this? Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 22, 2017 Report Share Posted March 22, 2017 Could there be a problem with the face on the block pete Link to comment Share on other sites More sharing options...
Darren Groves Posted March 22, 2017 Author Report Share Posted March 22, 2017 Could there be a problem with the face on the block pete It's been freshly painted so maybe an uneven finish. Will clean off to bare metal and try again, but will use the valve from the engine that's just come out. Darren Link to comment Share on other sites More sharing options...
Clive Posted March 22, 2017 Report Share Posted March 22, 2017 There really is nowhere it could leak from, unless there is a problem with damage, or the mating surfaces. Maybe pop the plugs out (means there is very little pressure on the crank bearings) and get it spun over with you watching carefully. At this point it is a bit of educated guesswork, a gpod look should give some more clues. Link to comment Share on other sites More sharing options...
Ben Caswell Posted March 22, 2017 Report Share Posted March 22, 2017 Are you sure its not the oil pressure switch diaphragm that has let go? Link to comment Share on other sites More sharing options...
Clive Posted March 23, 2017 Report Share Posted March 23, 2017 Just had a thought (!) pop the dizzy plate off, oil pump/dizzy drive out and spin the oil pump with a drill, see how that pans out. Needs a simple "thingy" in the drill, bit like a screwdriver. That will save the engine any potential damage. Link to comment Share on other sites More sharing options...
djn Posted March 23, 2017 Report Share Posted March 23, 2017 Just a thought. When I rebuilt my 2500 (spitfire) the oil filter o ring didn't seat properly and lost a lot of oil on start up. Worth checking exactly where the oil came from. 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 23, 2017 Report Share Posted March 23, 2017 Getting that ring seated is a classic orrible design that works fine till you change it and dont get the seal down in the inner register you cant see. pete Link to comment Share on other sites More sharing options...
Darren Groves Posted March 23, 2017 Author Report Share Posted March 23, 2017 OK, so I have won the award for numpty of the week. Pete, you need to get a stock of new T-Shirts for me I think. Oil leak wasn't from the pressure relief valve, but from the 4 missing oil gallery blanking setscrews I forgot to fit, put those in and oil pressure light goes out immediately.....what a tw*t! On a slightly different issue, I started the engine and it was running nicely and had been for 5 minutes or so, then a strange noise and was only running on 3 cylinders. Identified it was No.3, popped the rocker cover off to find one of the rockers had jumped off the pushrod. I had set the valve clearance and the lock nut was tight so hadn't come loose, anyone had this before? Darren Link to comment Share on other sites More sharing options...
rogerguzzi Posted March 23, 2017 Report Share Posted March 23, 2017 Hello Darren the Numpty? A tight valve guide causing valve clearance to open and push rod falls out of the cup! What valve guides have you fitted? Roger Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 23, 2017 Report Share Posted March 23, 2017 Or the Tee shirt did not gap them correctly, especially if youre having a bad week Ha primark shrink to fit are cheap pete Link to comment Share on other sites More sharing options...
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