Are head and cylinder gaskets compression gaskets? |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Are head and cylinder gaskets compression gaskets? |
stevegm |
Oct 22 2016, 01:04 PM
Post
#1
|
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. |
Mark Henry |
Oct 28 2016, 12:49 AM
Post
#2
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
My personal engine, 102mm X 78mm, nickies with JE pistons.
Built the heads myself, 12mm plugs, 44mm X 38mm SS valves 8mm stems, new seats, dual springs , CrMo retainers, hardened keepers, shimmed, bit of exhaust porting 9mm X 8mm exhaust studs, bored to 103 register, 9.2 CR. No head gaskets, nothing really trick about the sealing surface.... I have about 20K on the engine now, my summer DD. Attached image(s) |
KeithVonLaws |
Oct 28 2016, 02:23 AM
Post
#3
|
Member Group: Members Posts: 57 Joined: 19-July 16 From: Napoleon , Ohio 43545 Member No.: 20,205 Region Association: North East States |
My personal engine, 102mm X 78mm, nickies with JE pistons. Built the heads myself, 12mm plugs, 44mm X 38mm SS valves 8mm stems, new seats, dual springs , CrMo retainers, hardened keepers, shimmed, bit of exhaust porting 9mm X 8mm exhaust studs, bored to 103 register, 9.2 CR. No head gaskets, nothing really trick about the sealing surface.... I have about 20K on the engine now, my summer DD. Nice Work Mark, I love the smaller 12mm plug work. Thats also part of my plan. I also see that you unshrouded the valves quite a bit. Do you do anything special when installing your valve seats ? (Thermally) Such as warming the heads and chilling the seats before installing them ? Most of my experience has been in the Diesel world or old school Small Block Chevrolet stuff.... Thanks Keith |
Mark Henry |
Oct 28 2016, 07:48 AM
Post
#4
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
"nothing really trick" of the four engines sitting om my bench, none of them look like that when i tear them down. those heads all look refreshed, and newly machined. new valve seats new valves, fly cut,new guides, etc. really? Yes really. The "nothing really trick" comment is about the sealing surface just being machined flat and no head gasket. As far as Len's heads being expensive...quality costs. I've used Len's heads a few times, very high quality work and worth every penny. Needless to say I know exactly what goes into building a set of HAM heads. Nice Work Mark, Do you do anything special when installing your valve seats ? (Thermally) Such as warming the heads and chilling the seats before installing them ? Thanks. I warm the heads a bit and cool them slowly. I've tried freezing the seats, but by the time I get my poop in a group they're warm anyways. Good eye on unshrouding the valves. |
Lo-Fi Version | Time is now: 1st June 2024 - 02:59 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |