Thread: Valves touching Pistons

I have not pulled a TD5 apart but have pulled many other engines with timing chains and the answer is yes the chain can move of the sprocket. How is the fuel pump set up on the TD5, because if it dosen't need to be timed you could get away with it as long as the crank didn't move. motors with mechanical pumps you will have to remove the rest of the timing cover and redo it properly.

I think the chain could move off the pulley, but I would be suprised if it did without some sort of outside influence.

Did the coloured links go back on the camshaft sprocket as they were when the head was removed?

Good luck
Pete

After looking at that picture, I'm not so sure...

If it were timing, I'd expect to see it on ALL of the pistons.

M

do these things stretch when over-reved?

though again,, should be on all.

im with camel landy on this one, a timing issue should have all the valves touching all the pistons.

run a straight line accross the head face and check its flat. i have seen alloy heads that have been machined with a bow in them from being clamped down the wrong way in the facing machine. so it could be possible that there has been .015'' machined off the front and back of the head and up to .060'' from the center. if this is the case your valve face to head face will be all over the show.

cheers phil

Originally Posted by discowhite

im with camel landy on this one, a timing issue should have all the valves touching all the pistons.

i have seen alloy heads that have been machined with a bow in them

Another is gudgen? pins being worn ... (Conrod to Piston) ... = piston being thrown (slapping) into the head

Move / rock the crank left to right and see if you have piston slack

Mike

Originally Posted by mike 90 RR

Another is gudgen? pins being worn ... (Conrod to Piston) ... = piston being thrown (slapping) into the head

Move / rock the crank left to right and see if you have piston slack

Mike

had a tdi 300 in the workshop wich showed n*2 and n*3 N*4 all had valve marks on pistons all were inlet valves (guess bad adjustment at one stage) but N*1 had the piston hitting the head marking things it should'nt. the cause was worn gudgen and bad wear in big end. strange only one showed signs of wear , maybe a cheap rebuild at one stage.
But end of the day measure warpage on the head and block every one forgets the block. Gaskets can chafe the surfaces of blocks I see it alot on bigger Diesel motors

I don't think it could be the adjustment as the td5 has auto adjusting valves. Unless the auto adjusters are mot working correctly.