|
Post by davev6newman on Nov 15, 2012 19:16:36 GMT 1
If you click on the video you can see the smoke. This van has always been smokey ever since i bought it and very heavy on the fumes. The Co2 mixture is perfect and new carb 2 years back. What could be causing the smoke and fumes? Valve oil seals?
|
|
|
Post by muttleymk2 on Nov 15, 2012 19:40:19 GMT 1
Hard to tell colour, is it white/grey or blue. White/grey is not a problem, blue will be valve guide oil seals most likely but maybe the start of ring problems.
|
|
|
Post by FredTransit on Nov 15, 2012 19:41:06 GMT 1
cant see the vid (need flash on the phone) but from that pic I would say as you suspect valve guide seals. Is the engine using oil and no leaks?
|
|
|
Post by davev6newman on Nov 15, 2012 19:57:49 GMT 1
No ive no oil cosumption or leaks, but then again i dont do hardly any miles. the fumes is what gets me tho, ive recently had to extend the exhaust pipe as it finished under the van and the fumes in the cab were terrible. Infact driving home during the summer at night with the windows open this year the carbon monoxide alarm in the van went off
|
|
|
Post by gpw on Nov 15, 2012 20:00:37 GMT 1
you running dino multigrade Dave?
If so, it might be the cause of the problem.
Once your rings / pistons get a bit worn, the oil on the cylinder walls temporarily stops being multi-grade and turns into thin oil.
That thin oil gets past the oil rings and burns to make smoke.
I know urban legend reckons multigrade is good for worn engines, but the downside is that it gets past the oil rings and makes smoke.
My answer is to live with it. Oil burners run for ever. ;D
|
|
|
Post by davev6newman on Nov 15, 2012 20:04:24 GMT 1
Running 20/50 and changed every 12 months and only done 800 miles last year
|
|
|
Post by gpw on Nov 15, 2012 21:35:50 GMT 1
It's probably the dino multi that's doing it Dave, not to worry I'd say. Oil burners last for ever. They used to reckon something something like a pint per 100 miles was normal for new Jags driven fast sometime last century. ;D
|
|
|
Post by FredTransit on Nov 15, 2012 22:52:55 GMT 1
oil burners run forever as long as they are topped up ;D Sounds like Dave is on top of it though!
|
|
|
Post by gpw on Nov 16, 2012 9:05:38 GMT 1
oil burners run forever as long as they are topped up ;D Sounds like Dave is on top of it though! Yup ;D
|
|
|
Post by davev6newman on Nov 17, 2012 12:01:44 GMT 1
I wish i were, looks like a head off job to me. A job for the up and coming winter months. I used to have the head off more times than i care to remember on my old Cortinas to replace camshafts.
|
|
|
Post by gpw on Nov 17, 2012 14:13:29 GMT 1
How much piston blow-by have you got Dave?
|
|
|
Post by FredTransit on Nov 17, 2012 15:49:18 GMT 1
How much piston blow-by have you got Dave? would a compression test tell you?
|
|
|
Post by gpw on Nov 17, 2012 18:08:29 GMT 1
How much piston blow-by have you got Dave? would a compression test tell you? If you take the oil filler cap off Fred, normal engines suck and blow.
Engines with blow-by just blow.
You can use a compression tester or you wish.
Do a straight forward test; note the results.
Squirt a bit of thickish oil through one plug hole; compression test; compare the results with the dry comp tests. If the dry test gives a noticeably lower reading than the wet test, there's probably blow-by on that piston.
Now test and compare the other cylinders.
My punt is that more than 10% change stuck rings / worn bores are likely. Between 5 and 10% could be. Less than 5% not significant.
But I'm not up to speed on Pintos, Muttley may well give you better figures.
|
|
|
Post by davev6newman on Nov 17, 2012 19:11:36 GMT 1
I will give a compression test tomorrow and see. I get a suck suction from the filler spout i cleaned the wire gauze in the cap, you can still hear the sucking of air through the cap.
|
|
|
Post by RDTranny on Nov 17, 2012 19:31:24 GMT 1
Looking at the fumes it looks like it may be water vapour which would be more obvious when the weather is cold. Usually reduces as the engine warms up but if there is water in the exhaust pipe it would cause it to happen as well. Have you taken the van on a long run lately?
|
|