 Head gasket Theory Question, not a question for the average guy (like me) |
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| 76-914 |
 Feb 23 2012, 03:03 PM
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Repeat Offender & Resident Subaru Antagonist  Group: Members Posts: 13,507 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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I have one 914-2.0 w/ head gaskets and one 914-2.0 w/o head gaskets. I'll probably find out eventually but I have the patience of a charging Rhinoceros so I'm hoping someone w/ the experience can answer me this; I've read that a valve is cooled somewhat by the brief time it is in contact with the head. If this is correct, it makes me wonder if the head gasket plays some roll in arresting heat transfer from cylinder to head?? Stupid question but it will help me sleep better. TIA, kent
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Replies(1 - 3)
| VaccaRabite |
Feb 23 2012, 03:36 PM
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Head gaskets are copper, and copper conducts heat very well. So, no.
If they were copper for sealing sandwiched with asbestos or some other barrier, then yes. But, they do nothing to arrest heat between head and cylinder. Zach |
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| URY914 |
Feb 23 2012, 03:44 PM
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,967 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
The cylinders also contact the heads on the sides not just the top of the cylinder. They fit into the head. So the gasket wouldn't stop heat transfer.
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| Dave_Darling |
Feb 23 2012, 04:12 PM
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#4
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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QUOTE(Vacca Rabite @ Feb 23 2012, 01:36 PM)  Head gaskets are copper, and copper conducts heat very well. So, no. Stock ones are layered white metal, not copper. I am told that if you use the copper ones, you need to periodically (or at least once) re-torque the head nuts. Not so with the stock gaskets or with none. --DD |
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