Headgasket failure on all 4 cylinders, improper torque or ?, Exhaust sides only, normal? |
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Headgasket failure on all 4 cylinders, improper torque or ?, Exhaust sides only, normal? |
Mueller |
Jul 3 2016, 04:52 PM
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#1
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
Doing some reading and it seems that not installing the head gaskets are the thing to do when rebuilding a TypeIV.
That being said, could the damage below be one of the reasons for a poor running motor? I was told that after the motor was rebuilt the PO had nothing but running issues and kept replacing fuel injection components on the Djet trying to hunt down the problem. Finally got fed up and threw a 2.0 from a wrecked car. |
Mark Henry |
Jul 3 2016, 06:00 PM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I don't use head gaskets, if those were leaking then yes it can cause issues.
But I've seen much worse. |
forrestkhaag |
Jul 3 2016, 06:21 PM
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#3
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Senior Member Group: Members Posts: 935 Joined: 21-April 14 From: Scottsdale, Arizona Member No.: 17,273 Region Association: Southwest Region |
Agree with Mark Henry as does a long time type 4 mechanic here in Costa Mesa: Don't use them and they will not blow.
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bdstone914 |
Jul 3 2016, 06:37 PM
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#4
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bdstone914 Group: Members Posts: 4,673 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Saw some original factory installed head gaskets and one cylinder sucked in one of them I heard Porsche issued a bulliten to stop using them.
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forrestkhaag |
Jul 3 2016, 06:56 PM
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#5
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Senior Member Group: Members Posts: 935 Joined: 21-April 14 From: Scottsdale, Arizona Member No.: 17,273 Region Association: Southwest Region |
good info Bruce / that is what Norm at Mesa West has used for years as his rebuild set-point on head gasket use / dont do it.
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914Sixer |
Jul 3 2016, 07:00 PM
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#6
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914 Guru Group: Members Posts: 8,989 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Shouldn't you lap the barrels into the heads if not gasket is going to be used?
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DBCooper |
Jul 3 2016, 07:30 PM
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#7
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
Saw some original factory installed head gaskets and one cylinder sucked in one of them I heard Porsche issued a bulliten to stop using them. It wasn't Porsche, actually, it was a VW bulletin from 1992. Porsche never said not to so the people who insist they're Porsche engines and not VW take that to mean you should use them. You shouldn't. Adjust your deck height and compression with gaskets under the cylinders to make up for what you lose from removing the (compressed) head gaskets. And yes, lap the cylinders into the heads. |
stugray |
Jul 3 2016, 07:32 PM
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#8
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
1 - Is everyone sure those are head gaskets? They dont look quite right
2 - Those sharp edges in the comb chambers could easily cause detonation. Detonation for no apparent reason might cause one to retard the timing trying to get it to stop. Retarded timing results in poor performance. 3 - I dont use head gaskets |
Mueller |
Jul 3 2016, 08:47 PM
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#9
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
1 - Is everyone sure those are head gaskets? They dont look quite right 2 - Those sharp edges in the comb chambers could easily cause detonation. Detonation for no apparent reason might cause one to retard the timing trying to get it to stop. Retarded timing results in poor performance. 3 - I dont use head gaskets I was able to remove all four, none of them have a round ID, material is squished inward like more tension on the exhaust valve side. |
r_towle |
Jul 3 2016, 08:50 PM
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#10
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
So you were able to remove the head gasket?
All clean with no visible damage from leaks? |
Mueller |
Jul 3 2016, 11:46 PM
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#11
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
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Mueller |
Jul 3 2016, 11:53 PM
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#12
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
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DBCooper |
Jul 4 2016, 06:36 AM
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#13
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
You said fail, but the gaskets all look intact. That divot is odd, but all in all it doesn't look bad. Or abnormal. When a gasket "fails" the combustion gases will erode a path across the sealing surface of the head. I don't see anything like that, can you feel it, like with your fingernail?
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Mueller |
Jul 4 2016, 10:55 AM
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#14
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
I removed something from the divot, grain of sand sized something.
Surface for sure needs to decked, you can feel high and low spots where the gaskets had been. |
DBCooper |
Jul 4 2016, 11:10 AM
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#15
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
I removed something from the divot, grain of sand sized something. Surface for sure needs to decked, you can feel high and low spots where the gaskets had been. There are always machining lines left around the circumference, but are there any lines radially, across it? That's an actual fail, when the gasses cross where the gasket was, and not just carbon deposits or discoloration, but actual erosion of the metal. Doesn't mean it's not there, but I can't see that in the photos. Minor irregularities will come out when you lap the cylinders into the head. |
Mueller |
Jul 4 2016, 11:14 AM
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#16
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
I removed something from the divot, grain of sand sized something. Surface for sure needs to decked, you can feel high and low spots where the gaskets had been. There are always machining lines left around the circumference, but are there any lines radially, across it? That's an actual fail, when the gasses cross where the gasket was, and not just carbon deposits or discoloration, but actual erosion of the metal. Doesn't mean it's not there, but I can't see that in the photos. I get what you are saying, I guess headgasket "failure" is the wrong terminology here, of course who knows if that would have happened in the near future if ran like that. |
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