Hi to all
1998/9 swb Pajero v6 3000 petrol. I have just had my heads skimmed and the gaskets replaced due to a gas leakage into the coolant detected (by silverton radiators) while servicing my radiator. The engine rebuilders told me that the heads were now reconditioned, valve guides were redone? and as one of the lobes on the camshafts was badly pitted both the shafts were ground smoothly again. I got my vehicle back yesterday and out of curiosity I performed the recommended procedure to see if any oil was leaking past the valve guides by driving down hill, taking my foot of the accelerator and running against compression for a few seconds, and then as I acceleated again smoke puffed out of the exhaust for a couple of seconds.
Can this indicate that the valve guides/ seating was not done properly or will there always be some oil being sucked into the piston chamber by the vacuum when running against the compression? I am of the undestanding that new valve stem seals were installed as the existing ones had hardended and lost their flexibilty?
I also had silverton do the gas check on the coolant system again after the refitting of the heads but this time it was negative and the testing fluid did not discolour.
Tks
Affiliate Member
In theory you should not have any oil past the stem seals, the big question is what colour is the smoke? White smoke would indicate oil being burnt and black/blue smoke would indicate a rich mixture
Henk Bannink
Some people are wise, some people are otherwise
Some people are wise, some people are otherwise
Henk tks for the feed back. As far as I could see im my side mirror the smoke was a dark colour as it immediately caught my eye. Which could then indicate a rich micture? Can one set the mixture yourself or can it only be done with special equiment as what the workshops should be using? How do I get them to show me that their is no leakage past the valve stems?
Tks
Tks
Affiliate Member
There is a company that sells an interface and software that you can plug in to the management on your mitsu bu believe me if you are not clued up it is Greek to try and understand. My 5c worth would be to take it to a good tuner and have the baby dyno tuned.
The best way to see if there is oil past the stem seals would be to keep an eye on oil levels and to drive behind the pajero and look for tell tale signs of white smoke after prolonged idling or running against compression for a bit, unfortunately that is also the ideal conditions for a rich mixture
The best way to see if there is oil past the stem seals would be to keep an eye on oil levels and to drive behind the pajero and look for tell tale signs of white smoke after prolonged idling or running against compression for a bit, unfortunately that is also the ideal conditions for a rich mixture
Henk Bannink
Some people are wise, some people are otherwise
Some people are wise, some people are otherwise