Author Topic: head gasket with 1mm over bore (Read 2381 times)

thomcat · « **on:** March 26, 2009, 05:36:59 pm »

Well I got my freshly faced pistons back from the machine shop, assembled the short block, then started looking at my 1.6 head gasket fit.
Its close to the pistons , I wouldnt worry if it had alighnment dowels to hold it it place . But without them it can get a little close to the pistons.
The engine is bored 1mm over, 1.6 na mech. Do I have anything to worry about? Any suggestions not involving spending a bunch of money too center the head gasket? I usualy use a little sealer despite the victor reins suggestion not too. but that wont help me with this prob lol.

truckinwagen · « **Reply #1 on:** March 26, 2009, 05:42:45 pm »

if you have a pair of the old head bolts you can hack the head off of them, cut a slot(so you can unscrew them with a flathead scewdriver) and use them as alignment dowels.

just screw them in, put the head on, install the rest of the headbolts, remove the two with a screwdriver and magnet, and put in the final two bolts.

or you could buy a set of studs

thomcat · « **Reply #2 on:** March 26, 2009, 05:49:10 pm »

Im running studs; I think ill back two of them out slightly to expose the larger diameter threaded part. put the head on, snug it down. then run the studs back in . Sound like a plan?

truckinwagen · « **Reply #3 on:** March 26, 2009, 05:50:36 pm »

sounds good to me, I wasnt sure if you were running studs or not.

yeah, since the studs can be tightened down after the head is on that should work good

Rabbit TD · « **Reply #4 on:** March 26, 2009, 05:56:49 pm »

If you are a little concerned about the gasket covering the bore just have piston 1 and 4 at TDC and when you drop the gasket on you will know it is clearing the bores.

Vincent Waldon · « **Reply #5 on:** March 26, 2009, 07:44:25 pm »

AFAIK the gaskets are sized in such a way as to handle standard overbores... and I've never seen "overbore" gaskets available... so you're probably good to go.

fatmobile · « **Reply #6 on:** March 26, 2009, 10:31:39 pm »

I pulled a head off and found the piston was smashing the gasket.
Looked like it had been doing this for a long time. I pulled the head because of a leaking headgasket.

Nowadays I set a headgasket in place and see how the edges line up before I set the head on it,..
then check the edges before I bolt it down tight.

zukgod1 · « **Reply #7 on:** March 27, 2009, 08:37:08 am »

Quote from: "fatmobile"

I pulled a head off and found the piston was smashing the gasket.
Looked like it had been doing this for a long time. I pulled the head because of a leaking headgasket.

Nowadays I set a headgasket in place and see how the edges line up before I set the head on it,..
then check the edges before I bolt it down tight.

1st time I've ever heard of that happeneing.