VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => IDI Engine => Topic started by: thomcat on March 26, 2009, 05:36:59 pm

Title: head gasket with 1mm over bore
Post by: 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.

Title: head gasket with 1mm over bore
Post by: truckinwagen 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 :D

Title: head gasket with 1mm over bore
Post by: thomcat 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?

Title: head gasket with 1mm over bore
Post by: truckinwagen 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

Title: head gasket with 1mm over bore
Post by: Rabbit TD 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.

Title: head gasket with 1mm over bore
Post by: Vincent Waldon 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.

Title: head gasket with 1mm over bore
Post by: fatmobile 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.

Title: head gasket with 1mm over bore
Post by: zukgod1 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.