Funkykipper

Funkykipper

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Hi all. Well the weekend is here at last and I am after some devine guidance.

Replaced the head gasket on my Disco 300 tdi and after putting it all back together the engine is misfiring and chucking out blue smoke.

I thought i'd set the tappets but I really do not think that I have got it quite right.

Can anyone tell me what the correct gap setting is and fool proof way of setting them properly?

Cheers one and all.
 
Its a manual IIRC..Jack passenger wheel up, whack it into 5th so you can turn wheel with yer foot and watch the valves opening.
 
8 thou ,and you need to watch valve opening and stop as soon as its fullt open (rocker stops moving for split second ) if you go past that point keep going till another valve is just fully open,set gap on what ever number valve is fully open to add uo to nine ie 3 open set 4 open set 5 etc number 1 been at front of engine ,mark each one as you set it as they dont go in 1 to 8 order
 
Funkykipper said:
Ahhhh So I set them when the valve is fully open and not closed?
Click to expand...


No mate, you set them fully closed, as guru has said, if #1 valve is fully down (open) you set #8. It's called rule of 9. So when #2 is fully down (open) you set #7. #3 set #6. #4 set #5 etc
 
And get some tipex or similar and mark them as you set them it is easy to get lost if your not doing it regular
Dev
 
You can turn the engine over using a socket on the alternator bolt so that you can watch the tappets move (open/close) and yep good tip about the tipex. I put a small spot on the rocker when i have done the gap so you can see easily if you have done em all.

Daz
 
Suris said:
No mate, you set them fully closed, as guru has said, if #1 valve is fully down (open) you set #8. It's called rule of 9. So when #2 is fully down (open) you set #7. #3 set #6. #4 set #5 etc
Click to expand...

Brilliant, thank you. That makes sense now.

I basically went from front to back setting them all at 0.2mm as they were closed.
i.e when they became loose on the cam.
 
Sunday update:
Engine running quite nicely, except an air lock in the water which will not shift.

Misfire was due to a rogue valve cap lodged down in the pushrod tube and stopping the cam lifter returning onto the cam.
Very strong telescopic magnet and a gentle push on an old pushrod retrieved it.

Thank you everyone for your help and assistance. Much appreciated.
 
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