Hi,
I bought a V8 engine that was smoking excessively when revved up, no problem ticking over.
In order to rule out over fuelling, fitted a manifold with SU carbs on, no different.
Stripped down and found that the 4.6 had 3.9 heads fitted. Engine was extremely clean inside.
I found 5 of the rubber washer type valve stem seals had split/come off and thought that that was the problem.
Pulled all pistons out and no broken rings, bores all looked ok. Fitted new Big End bearings while I was in there.
Rebuilt, new head gaskets, valve stem seals (Cup type) etc and no difference, still smoking badly. Tried to upload video, but can not seem to manage. Smoke is very smelly.
Look forward to hearing from you.
Michael
Excessive Smoke - Help
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Re: Excessive Smoke - Help
What colour is the smoke?
As a general rule of thumb, blue smoke is oil, black is fuel and white can be steam or brake fluid from the booster.
As a general rule of thumb, blue smoke is oil, black is fuel and white can be steam or brake fluid from the booster.
Cheers,
John
John
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Re: Excessive Smoke - Help
Difficult to distinguish. Blue black, probably more blue. Certainly not white
Re: Excessive Smoke - Help
Can you run a compression test and a leakdown test? Sounds like it could be rings not bedded in.
Chris.
Chris.
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Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Re: Excessive Smoke - Help
Yup - if the pistons were out, did you fit new rings and de-glazed the bores? But if it was doing it before, maybe not the answer. Have you checked all the the crankcase breather system is clear?
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
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Re: Excessive Smoke - Help
Hi,
I have ran it for a while this afternoon and things are better, rings may be bedding in as suggested.
I have also tested the Maf and voltages are higher than stipulated, so I think it is poss a conbination of oil getting past the rings and over fuelling.
I have ran it for a while this afternoon and things are better, rings may be bedding in as suggested.
I have also tested the Maf and voltages are higher than stipulated, so I think it is poss a conbination of oil getting past the rings and over fuelling.