mantaboy89 Posted April 13, 2013 Share Posted April 13, 2013 Just bought a manta fitted with a 2.0 8v ohc engine. When checking it over I found there's some crankcase pressure from the oil filler when removed. Also from the dipstick tube. And it is spitting oil out of the tube. Don't know if this is normal for the ohc as ive only potched with the cih before. Engine has only done 4,000 miles and was bought from vauxhall. Fitted with an oil catch can if that makes a difference. Thanks for any help guys. Josh Quote Link to comment Share on other sites More sharing options...
Sutty2006 Posted April 13, 2013 Share Posted April 13, 2013 Could be an internal problem with the engine. Check the breather in the cam cover. Its removeable and cleanable. Failing that, its possible piston ring failure. Exhaust gases seeping through the rings pressurizing the crank case blowing the oil out of the dipstick tube.. Quote Link to comment Share on other sites More sharing options...
manta88 Posted April 14, 2013 Share Posted April 14, 2013 I would do a compression test first on the engine before taking it appart,if it tests ok then check the breather system ,it may be a simple fault. You can get a reasonable compression tester from Halfords. 1 Quote Link to comment Share on other sites More sharing options...
Rapierdave Posted April 14, 2013 Share Posted April 14, 2013 Agree with Manta 88, check that the breather system's not blocked, as hoses sometimes collapse internally or get filled up with mayonaise. & do a compression test. With a bit of luck it'll be a blocked breather causing the excessive crankcase pressure. Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted April 15, 2013 Share Posted April 15, 2013 the oil catch can is not sealed is it by any chance.ie just a pipe from engine into one pipe on can ? normal crankcase pressure will then build up with nowhere to go except blow out where it can Quote Link to comment Share on other sites More sharing options...
mantaboy89 Posted April 16, 2013 Author Share Posted April 16, 2013 It has a breather from rocker box to can. And one from the can to manifold. Quote Link to comment Share on other sites More sharing options...
manta88 Posted April 16, 2013 Share Posted April 16, 2013 What happens if you remove the pipe from the manifold. Quote Link to comment Share on other sites More sharing options...
dynamytedan Posted April 16, 2013 Share Posted April 16, 2013 i got the same engine , rebuilt with 8,000 miles now. it also had a lot of pressure . More at first until the rings bedded in . to combat it i put an oil catch tank in and then a breather filter where the old mechanical fuel pump fitting is . 1800gte cam carrier . that seemed to do the trick . Quote Link to comment Share on other sites More sharing options...
Sutty2006 Posted April 17, 2013 Share Posted April 17, 2013 I had to fit a catch tank on my 2.0 SEH engine... Mainly because the 1.8 air box wouldn't fit, but I think the rings were shot too. Quote Link to comment Share on other sites More sharing options...
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