Too much boost, too weak head gaskets
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My condolences for your hardship...
How much boost? Were they stock 4.0 head gaskets?
Is there anything better than the 4.2 gaskets and some arp head studs?
I've put my +4 lower back on which ran 18-19 psi. I'm a little worried about the head gaskets, but who was I kidding at keeping my car at "only" 13 psi?
I figure if it does blow a head gasket, I'll just upgrade to the 4.2 gaskets and that should end that worry.
How much boost? Were they stock 4.0 head gaskets?
Is there anything better than the 4.2 gaskets and some arp head studs?
I've put my +4 lower back on which ran 18-19 psi. I'm a little worried about the head gaskets, but who was I kidding at keeping my car at "only" 13 psi?
I figure if it does blow a head gasket, I'll just upgrade to the 4.2 gaskets and that should end that worry.
Last edited by WaterDragon; 03-28-2014 at 11:11 PM.
#7
![Default](/forum/images/icons/icon1.gif)
My condolences for your hardship...
How much boost? Were they stock 4.0 head gaskets?
Is there anything better than the 4.2 gaskets and some arp head studs?
I'm putting my +4 lower back on which ran 18-19 psi. I'm a little worried about the head gaskets, but who am I kidding at keeping my car at "only" 13 psi?
How much boost? Were they stock 4.0 head gaskets?
Is there anything better than the 4.2 gaskets and some arp head studs?
I'm putting my +4 lower back on which ran 18-19 psi. I'm a little worried about the head gaskets, but who am I kidding at keeping my car at "only" 13 psi?
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#8
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They were two years old stock 4.0 composite gaskets, which are easy to burn. Boost was just too high for them. I was testing AFR sensor/gauge when big BUM happened. There was grazy high pressure in the coolant system and upper radiator hose gave up. Funny that system was pressure tested and coolant analysed for possible gasket damage just day before and they did not tell anything about possible problems . At least right side gasket is badly damaged. Next gaskets will be MLS ones and maybe go for waterless coolant at the same time.
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Please tell me more about which head gaskets you are planning.
Did you know that the Evans water less coolant is FLAMMABLE
This is good info
This helps me start planning for if/when I blow a head gasket too. I won't claim to have been the first...
Did you know that the Evans water less coolant is FLAMMABLE
This is good info
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Last edited by WaterDragon; 03-29-2014 at 09:55 PM.
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My gaskets blew too and the photo of your jag on the flatbed is unfortunately familiar.
That being said, what's the best/strongest head gaskets I should replace mine with? I have a 98 XJR so it's whatever was the crappiest OEM one.
I see the 4.2 ones being touted... are these the gaskets for the 4.2L engine? Do they fit well?
Thanks.
That being said, what's the best/strongest head gaskets I should replace mine with? I have a 98 XJR so it's whatever was the crappiest OEM one.
I see the 4.2 ones being touted... are these the gaskets for the 4.2L engine? Do they fit well?
Thanks.
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Thanks! Have you fixed yours yet? You recommend going the route of those 4.2 gaskets? They should fit my '98 xjr right?
Last edited by poisonpill; 04-14-2014 at 10:27 AM.
#19
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Detonation is the enemy.
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