LT1 vs LT4 Head Gasket differences

Reply Subscribe

Thread Tools

Search this Thread

Jul 24, 2018 | 07:07 PM

FYREANT

Thread Starter

I'm Batman..

Joined: Apr 2014

Posts: 6,142

Likes: 921

From: Lehigh Acres FL

Tech Contributor

LT1 vs LT4 Head Gasket differences

The LT1 uses head gasket part number: 12659260 (old number: 12622331)
The LT4 uses head gasket part number: 12654622

The LT1 head gaskets are silver with red and the LT4 look to be silver with black. I know there is more to the LT4 other than the color difference. Does anyone know specifically what is different between them exactly? Thanks

Ant

Sep 19, 2018 | 01:53 AM

Corvette4ever

Drifting

Joined: Jun 2000

Posts: 1,577

Likes: 99

From: Dubai, UAE

hi Ant, were you able to identify the differences? Would LT4 head gasket work with LT1 heads?

Sep 19, 2018 | 07:32 AM

FYREANT

Thread Starter

I'm Batman..

Joined: Apr 2014

Posts: 6,142

Likes: 921

From: Lehigh Acres FL

Tech Contributor

Quote:

Originally Posted by Corvette4ever

hi Ant, were you able to identify the differences? Would LT4 head gasket work with LT1 heads?

They will work. If I remember correctly from when I looked, the LT1 head gaskets are 5 layer and the LT4’s are 7 layer.

Sep 19, 2018 | 04:56 PM

thrilled

Safety Car

Joined: Mar 2014

Posts: 4,482

Likes: 668

From: Kilmarnock Va

There are multiple things different with the LT4 to the LT1.It’s on this site I saw it.But it’s been awhile.

Sep 19, 2018 | 09:39 PM

FYREANT

Thread Starter

I'm Batman..

Joined: Apr 2014

Posts: 6,142

Likes: 921

From: Lehigh Acres FL

Tech Contributor

Quote:

Originally Posted by thrilled

There are multiple things different with the LT4 to the LT1.It’s on this site I saw it.But it’s been awhile.

I have them both here. I’ll lay them on top of each other and check the differences. I can’t imagine they are any different since the blocks for the LT1 and LT4 are the same, the gaskets would have to be the same as well.

Sep 19, 2018 | 10:14 PM

robert miller

Team Owner

Joined: Jan 2007

Posts: 29,063

Likes: 1,839

From: cookeville tennessee

Quote:

Originally Posted by FYREANT

I agree maybe thicker & maybe a little diff stuff that the LT4 gasket is made of due to the lowing the comp on it, plus a little better stuff to help it not to blow out due to the blower being on the car.

Ant please check the thickness of them due to my motor build I may go with a set of the LT4 with this is the case... If you dont care give me a message on what you find out or see from the diff's. Robert

Last edited by robert miller; Sep 19, 2018 at 10:15 PM.