Are head and cylinder gaskets compression gaskets? Options

[stevegm]

I need to remove the heads off of a newly rebuilt engine (4-cylinder) I built (never run). They have already been torqued. Are the head gaskets and gasket between the cylinder and block, compression gaskets that should be thrown away (i.e., replaced with new one) after I untorque the heads?

The head gaskets will be easy to replace. But I'd have to pull the cylinders to replace the ones between them and the block.

[KeithVonLaws]

I bet more failures occur due to Pre-ignition or detonation from poor tuning or other build mistakes like Mark's reference to the 96mm gasket overhang/hotspot.
Its plainly obvious clamping issues and surface finishes make a difference.
Besides clamp load - bore distortion and surface finishes and all the usual
hurdles we have to look at for a racing engine.....If your building a mild street application I would lean to focusing on proper build techniques attention to small details..... Lap the head to the cylinders... measure and equalize everything
and use proper tuning .


In my case Personally, I would like to see for myself if I can build a
reliable 250 hp Type IV engine for track day events and some limited road driving for under $6000.00 - Thats my goal...pretty lofty I know. I am slowly getting my components together.

[Mark Henry]

In my case Personally, I would like to see for myself if I can build a
reliable 250 hp Type IV engine for track day events and some limited road driving for under $6000.00 - Thats my goal...pretty lofty I know. I am slowly getting my components together.

Well that's a topic for another thread, but I'd say no to the 250hp. You're expecting too much from a pushrod engine based on a 90 year old design.
I have well over $8K in parts into my long block alone, count my EFI and exhaust close to $12K for 180hp.
That's just in parts.

If 250hp is your goal I'd forget about the T4 and /6 and go straight to a V8. Even then your budget might be a tad light.

[DBCooper]

In my case Personally, I would like to see for myself if I can build a
reliable 250 hp Type IV engine for track day events and some limited road driving for under $6000.00 - Thats my goal...pretty lofty I know. I am slowly getting my components together.

Well that's a topic for another thread, but I'd say no to the 250hp. You're expecting too much from a pushrod engine based on a 90 year old design.
I have well over $8K in parts into my long block alone, count my EFI and exhaust close to $12K for 180hp.
That's just in parts.

If 250hp is your goal I'd forget about the T4 and /6 and go straight to a V8. Even then your budget might be a tad light.

You could do that, or go turbo Subaru, a half-ton lighter and still a flat four.