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Please help with engine diagnostic
Posted: Thu May 20, 2004 4:34 pm
by RiceThief
I was driving on the highway and when I took an exit I notice smoke coming out of my bonnet, so I pulled over and had a look and theres smoke coming out of the breather, lots of it. When I took it home and open up the oil filler cap and heaps of smoke came out, only thing is theres no smoke coming out of the exhaust. I did a compression test and i've got 150psi +/- in cyl 1,2,4 but only 70psi in cyl 3. Does this mean the piston/rings in cyl is stuffed or could the valves not be sealing? Is there a way to tell without pulling off the head. Sorry about the long post and thanks in advance.
Mai
Posted: Thu May 20, 2004 4:40 pm
by Cookiemonster
Was it smoke or steam?
REPLY
Posted: Thu May 20, 2004 4:41 pm
by davidbek95
TAKE IT BACK TO BLOKE WHO BUILT THE MOTOR AS THIS IS ONLY A FRESH MOTOR,THIS DOESN'T SOUND TO GOOD.
REGARDS DAVID
Posted: Thu May 20, 2004 4:48 pm
by RiceThief
Its smoke, i've checked water and its fine, oil is full to but then its only just happened.
Posted: Thu May 20, 2004 5:03 pm
by Cookiemonster
Could be a bad valve guide.
Do the compression test again but this time put of bit oil into number 3 cylinder via the spark plug hole. If the pressure comes up then that indicates bad rings. If the pressure remains the same then its valve guides or headgasket.
*Edit: if this is a new engine then I would be taking it straight back to the builder and get him to diagnose and fix it.