Blue Or Gray Smoke

[Guest jelleyhead]

Hi all

 

Yet more problems.

 

When accelerateing am not sure what i was seeing.

 

If it was blue or gray smoke pooring from the exhaust.

 

So i have done a compression test all cylinders were giveing me 130 psi as they were all around the same i am thinking this is ok or should this be a higher readying am not sure what the compression should be on this engine it's a ford 2.0 dohc.

 

When taking the plugs out one of the plugs had oil all over it the other 3 were ok

 

I don't want to start pulling the head off just yet till i am 100% sure what the problem is.

 

Darren

[philshelton]

Valve stem seals?

[Guest jelleyhead]

Ok thanks

[kevin the chicken]

Check ignition system first. Might just be a lead or plug failed. If all the pressures are the same unlikely to be a ring or valve. Don't panic and start pulling the engine to bits without checking basics first

[Guest lotusPaul]

Don't panic and start pulling the engine to bits without checking basics first

 

I second that

Edited May 13, 2017 by lotusPaul

[knights_templar]

a compression check does not check the oil rings, so is of no use.

 

130 is lowish but if even is not a problem, I agree with philshelton

[ivorbigun]

find a hill and coast down with foot off the throttle then accelerate if you get loads of smoke then valve stem seals or oil control rings.

my old mini used to completely engulf the road before I rebuilt the engine,and it needed new valve stems as well as seals.

[Guest jelleyhead]

Hi all just an update I have taken the head off and this is what I have found.

 

Any advice on what to do thanks.

Edited May 28, 2017 by jelleyhead

[jaimo]

I had similar symtoms and photos to yours after alot (dont start guys)

I changed bottom end and no more burning oil now just chucks it out aux shaft seal all over engine

So check bottom end mine looked good but some was amiss

[Guest mcramsay]

Hang on a moment, don't go near the bottom end yet, the first and second photo show what looks to be oil coming through from the valve seat, this would point to the valve stem seals, go for the easy things first, stem seals and rebuild, see how it runs, if no change then easy to assume its bottom end.

 

To me it definitely looks like you have oil coming down through some of the stem seals into the valve

 

Have a look at the stem seals, check they all have the small springs around the top, generally they tend to go crispy and crack

[Guest lotusPaul]

I agree with the above. Valve stem seals first. If you want to have peace of mind then spin the crank so all pistons are at same level ish, chuck in a small amount of diesel into all bores and leave to soak in. Any that drop different to the others may need a look at.

Actually your heads dont look bad apart from first picture. Perhaps yours can be saved with a little refurb in the right places.

Sort out head then id look at rings if i were you.

[tractor]

Yep I can see your problem there seems to be two valves per cylinder missing!!!!!!

[knights_templar]

second Mcramsay and lotuspaul

 

its a known problem with the Pinto, and other engines, with rubber valve stem seals.

[cb750]

I'm intrigued with the valve reliefs on the piston tops. They look like they are designed for a 16 valve engine. What engine is it?

[Guest jelleyhead]

Engine is 2 ltr 8 valve dohc from the sapphire.