how to de-coke????

[V8 BJC]

Originally Posted by craggle

Hey, I need my beauty sleep OK, Wide awake now anyway.

I was up at 6 yesterday morning and had to endure a train ride across Munich, and a delayed Aerlingus flight back. The spicy sausage and potato salad for dinner was good though And the big glass of local beer.

We all got on the already late plane and the Pilot (in an Irish accent) says there was some damage to one of the main tyres and they are inspecting it. 20 minutes later he said we were going to change the tye but they had pulled a nail out of it and it hasn't gone down yet so were going to give it a go!
Got us home just fine though.


Craig.

Bet you were all clenching on landing!!!!!!!

[craggle]

Ha, I bet a few people were.

Luckily I know a little bit about planes and a burst tyre doesn't usually cause too many problems.

Craig.

[ldtopham]

Originally Posted by Gonch

Hi,
Does anybody have any good recommendations for de-coking valves. Ive tried lotox and acetone and its not done much. What about diesel? or is it just a load easier to take it to a engine shop for hot tanking

Cheers

Fraz

Fraz, are they removed from the head? They need to be to do a proper job. I use a wire wheel on the bench grinder to clean them up. Make sure you keep them in order of removal if you're only cleaning up and re-lapping. A drill with a wire wheel attachment will achieve the same results.

I did a set last week but as there was a quite a lot of pitting on the valve faces I had to re-face each valve. Don't forget to check runout and guide wear whilst it's apart.

HTH

[cliffords]

Wash them in brake and clutch cleaner.
Buy a gallon from your local motor factor

It cleans them very well with little effort if you soak it a bit

[Purple AK]

Originally Posted by Gonch

Hi,
Does anybody have any good recommendations for de-coking valves. Ive tried lotox and acetone and its not done much. What about diesel? or is it just a load easier to take it to a engine shop for hot tanking

Cheers

Fraz

Just hazarding a guess as I've not tried it. But I would have thought a good soaking in Oven Cleaner would shift it. And it's cheap (if you don't get caught borrowing it )