Are head and cylinder gaskets compression gaskets? |
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Are head and cylinder gaskets compression gaskets? |
stevegm |
Oct 22 2016, 01:04 PM
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#81
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Advanced Member Group: Members Posts: 2,111 Joined: 14-July 14 From: North Carolina Member No.: 17,633 Region Association: South East States |
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. |
N_Jay |
Oct 28 2016, 11:17 AM
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#82
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Member Group: Members Posts: 283 Joined: 2-March 16 From: Chicago NW Burbs Member No.: 19,720 Region Association: None |
This has ben fun and educational.
Thanks to those with the experience to lend. OK, who wants to go in a engine with a machined grove for an o-ring sealing gasket? The best of both worlds. Cylinder to head contact AND a crush seal? |
914_teener |
Oct 28 2016, 11:47 AM
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#83
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914 Guru Group: Members Posts: 5,245 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
This has ben fun and educational. Thanks to those with the experience to lend. OK, who wants to go in a engine with a machined grove for an o-ring sealing gasket? The best of both worlds. Cylinder to head contact AND a crush seal? Well....I'll put my engineer hat on and my experience to add: Point of failure, especially critical to failure. Ask the Morton Thiokol engineers what they think about O rings. There is really no argument here, it really depends on the conditions and the failure mode...how many of them are critical. Economic viability drove them to engineer the O ring solution. If money weren't an object...it wouldn't have been there. When they identified the failure point (32 degrees) politics and money took precedence over the engineers. In context to our passed friend John Larson whom I had to pleasure of meeting on several occasions I'll share a story and if some of you have heard this one before please indulge me a little. One of the last things he built was my spare transmission before he passed. I was with him in his garage while we were fitting the nose cone on and the shift lever cover has a small little O ring where it fits into the case. He took GREAT pains to make sure it was clean...seated properly...and wasn't pinched at all. It was a pleasure to watch him work. I asked him why most people put silicone in there and he replied: "...because most people don't know what the phuck they are doing and it makes them feel better". So if it makes you feel better, use gaskets. But know there is a risk to failure. Maybe there is a life lesson here about feeling good and doing good.....maybe? |
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