Valves to piston gap

[desmo888]

Originally posted by newsh
IMHO you should never "torque to spec" with old bolts, they are already stretched and may crack the block, I've seen it happen on Golf motors.

Nipping it down to 50% on the old gasket should be enough to check clearances though, don't you think?

Hmmm, I vever heard of a used stretch bolt cracking a block. Learn somethng new everyday, eh?

50% would be fine now that you mention it. Excellent suggestion.

[Greg_S]

Stretch bolts are a single use anyway and should be replaced each time

[desmo888]

Originally posted by Greg_S
Stretch bolts are a single use anyway and should be replaced each time

No need to replace them when you are going to remove them again right away. Just checking for clearance, gotta get your Play-Do out of the cylinder!

[Doug_RS2]

Originally posted by desmo888
Just checking for clearance, gotta get your Play-Do out of the cylinder!

Where does a grown man(without kids) find play-doh. I think I will use blue-tac with some oil on it to stop it sticking.

I'm going to do this just for peace of mind and to know how much of a gap there is - thanks.

[desmo888]

Originally posted by Doug_RS2
Where does a grown man(without kids) find play-doh.

Sorry, with a 3 and 5 year old in the house Play-Doh is quite common.
Good luck.

[s2avant]

Originally posted by Doug_RS2
Where does a grown man(without kids) find play-doh.

Imagination, Douglas. Me and the missus don't have kids but we have loads of toys (tin can alley, R/C cars, etc). Basically any kids toys we like the look of. We even have kandoo:eek2: . We've decided that if we don't get married we can have far more gadgets and fun stuff. Plus I get to spend what I like (can afford) on the S2 and she gets to buy shoes and handbags to her hearts content.

Ben

[desmo888]

Originally posted by s2avant
Plus I get to spend what I like (can afford) on the S2 and she gets to buy shoes and handbags to her hearts content.

Ben

Just wait Ben - DINKs to SILKies, it will happen

DINK - Dual Income No Kids

Silky - Single Income Lots of Kids

BTDT

[Mark Halligan]

Doug,

you think you have worries about valve to piston gap.

I got my cylinder head back today after having the pressure test and valve work done and when they resurfaced it they had to take a massive amount off to get it straight .
The upshot of this is that it is on the limit (just) as stated in the Audi workshop manual, the head was warped apparently in a couple of directions.
Problem is I am using 7A inlet and exhaust cams and this certainly isn't going to help any clearance issues.
I am going to definately do something I think with the head gasket, with a new thicker laser cut centre piece possibly, @ Lee you have a PM.

If that goes well it'll be on another thread.

This tuning hobby is getting a bit expensive, bit pissed off at the moment :mad: .

Mark.

[Doug_RS2]

Mark - here is a pic of my head before it had 8 thou taken off. Can you show me a pic that shows were that line is on your head(that line will move more towards the centre of the chamber, the more that is machined off) - be interesting to see the difference.

Cheers

[SteveH]

Doug,

Here's a pic of my head. It's been skimmed at least once. I'm waiting for the engineering company to re-cut a valve seat and check it's face for warping. Should be up and running soon

[Doug_RS2]

That looks nice and shiny Steve

I am worried now - becasue yours does not have that edge (I highlighted in my pic) overlapping your seats? Is the correct or is your pic too shiny to see that edge

Did you do the polishing yourself? Any pics of your inlet ports?

[Mark Halligan]

OK just took some pics, here are some from different angles:

[Mark Halligan]

Another, probably not a good angle though:

[Mark Halligan]

And with valves dropped in:

[Doug_RS2]

how can you be pissed off Mark when your head looks like that - Just put it on your mantlepiece