1g arp head stud clearance

[trillatl]

Hello everyone. I've searched for for this question but nothing helps. I'm limited to where I can post so here we go. I have a 95 TSi with a 1g motor in it. I've had it for about a year now and i've slowly been taking care of the mantance on it. I just got my 1g head back from the machine shop and I have the ARP head studs out of the block. When I put one of the studs through the head its a very tight fit. Not tight to where they wont pull through, but to the point where I was thinking its not going to fit right. This is only happening on one of the studs. So here is my question. Does the head stud have to have some play in it for some reason? Or is it ok to torque it down with molly lube? The head that I took off (A 1g head as well) had a lot more play then this one...

 

[Brandon Mau]

You should be fine. When I installed mine I had to use some elbow grease to get the head set on the block. I think it's normal to be honest with you. Just use your molly lube, Do the correct torque sequence and you should be good to go.

 

[trillatl]

Yeah I just didn't want to torque it down before I was sure... I heard some head studs need clearance for oil issues... After I get this handled I still have to pass smog lls... Thanks...

 

[BogusSVO]

It sounds like you have a 6 bolt short block with a 7 bolt head.

Even the 1g 7 bolt used 11mm bolts/studs.

The head studs should just drop right thu the head bolt holes..

http://www.dsmtuners.com/forums/newbie-forum/341028-4g63t-head-oil-port-mod.html

http://www.dsmtuners.com/forums/cylinder-head-short-block/341885-oil-port-mod-2-4g63t.html

If you have a 1g head, with the big intake runners, the head bolt holes will measure around .500

 

[WizardTSi]

The oil "issue" you are talking about is the oil supply for the head. The oil does get forced around a head bolt. I believe it's on the timing belt side, closest to the front of the engine. It's only an issue if you're putting a 7 bolt head onto a 6 bolt block as the 6 bolt studs are slightly bigger


edit: bogussvo beat me to it. Need a faster phone

 

[BogusSVO]

The oil "issue" you are talking about is the oil supply for the head. The oil does get forced around a head bolt. I believe it's on the timing belt side, closest to the front of the engine. It's only an issue if you're putting a 7 bolt head onto a 6 bolt block as the 6 bolt studs are slightly bigger

You are close, it is the last head stud on the exhaust side, passanger side.. furthest from the timing belt

 

[trillatl]

Yeah like I said the other ones slide right through... It's just the one on the passanger side top one thats was kinda not going throgh but I tried it again this morning and it went throgh... So I guess what i'm asking is does there need to be any more clearance besides whats needed to for the stud to fit snug through the head?

You are close, it is the last head stud on the exhaust side, passanger side.. furthest from the timing belt

Ok i've heard about this one... Is it ok for the stud to have no play. Is a really snug fit but it moves through...

 

[WizardTSi]

The top as in the firewall side? Than as long as it goes in. The oil one is closest to exhaust. Only one you need clearance for is by the Turbo feed line

 

[trillatl]

The top as in the firewall side? Than as long as it goes in. The oil one is closest to exhaust.

Yes the top one(Intake side/Passanger) was a really snug fit...

 

[BogusSVO]

Read both links I posted above, that should explain it in detail.

Nothing should be snug.

Basicly you are dropping a 12mm stud thu a 13mm hole.

If it is snug, it sounds like you are dropping a 12mm stud, thu a semi loose 12mm hole.

If the stud is sorta snug when just passing the stud thu the hole, then once the studs are in the block, you will have to force the head down over them, this is wrong.

Find a 1/2 drill bit and see if that passes thu the head bolt holes..

 

[trillatl]

Read both links I posted above, that should explain it in detail.

Nothing should be snug.

Basicly you are dropping a 12mm stud thu a 13mm hole.

If it is snug, it sounds like you are dropping a 12mm stud, thu a semi loose 12mm hole.

If the stud is sorta snug when just passing the stud thu the hole, then once the studs are in the block, you will have to force the head down over them, this is wrong.

Find a 1/2 drill bit and see if that passes thu the head bolt holes..

Understood and thank you!

 

[trillatl]

I'm when I was at work on my break I grabbed my ARP book and looked up the specs on the bolts that I have and they are the right ones. Its just that one had me thinking. Called them and they said its fine. I hope there right...

 

[BogusSVO]

Have you checked the head bolt holes in the head with the .500 drill bit?

 

[trillatl]

Thanks everyone that head is on and the car is no longer over heating! And the power has increased... How do you mark this as resolved???