Head gasket fail / winter upgrade

[nouseforaname]

Gasket failed with no knock . Motor was freshened up only 10k ago. The gasket I used was a felpro 9441 . I was tuning when the gasket let go but the a/f was around 11.5 and 0.0 kr on scan tool . I had minor knock when I was lowering the boost after a new boost controller installed . I'm upgrading a few items while I'm in there poking around . Next few weeks ill be replacing the stock mounts with HR poly mounts, RJC head gasket kit, iac angle kit , air distribution plate , metco drive shaft loop. I'm also replacing the power master with a hydro boost setup . Between power brake service and hydraboost any preference in either company. Both sell new Bosch and both seem like a good product hydraboost is 855 for their setup while PowerBrake service is about 1000 . Just want some input from some people on the board.

 

[nouseforaname]

Double post removed

 

[forcefed3.8's]

0 knock on a scantool doesn't mean there isn't knock. I am working on a car right now that had a bad fuel pump at the beginning of last summer. On Alky, 25psi, no knock retard, .810 O2 on the scanmaster. When I put a wideband on it, it was 16.9 to 17.5AFR. Put a new fuel pump in it, and it went to 10.8AFR. 4 months later he called me saying it is using coolant. I pulled the heads, the gaskets were slightly leaking (stock gaskets with o-rings in the heads). I pulled the pan, and the2 center mains were toast. Off to the machine shop, the piston pins were galled, needed oversized pins, rods were distorted on the big end, and a cylinder was collapsing from the pressure, needed a sleeve.

 

[nouseforaname]

I have a wideband a/f gauge and I was under 12.0 . My oil pressure is also 20psi at idle and 65-70 psi when driving under load . I had no water in my oil and it still idled but it seemed as though I blew a header gasket but that was what I found

 

[nouseforaname]

0 knock on a scantool doesn't mean there isn't knock. I am working on a car right now that had a bad fuel pump at the beginning of last summer. On Alky, 25psi, no knock retard, .810 O2 on the scanmaster. When I put a wideband on it, it was 16.9 to 17.5AFR. Put a new fuel pump in it, and it went to 10.8AFR. 4 months later he called me saying it is using coolant. I pulled the heads, the gaskets were slightly leaking (stock gaskets with o-rings in the heads). I pulled the pan, and the2 center mains were toast. Off to the machine shop, the piston pins were galled, needed oversized pins, rods were distorted on the big end, and a cylinder was collapsing from the pressure, needed a sleeve.

Sounds like it had some serious knock to cause that kind of carnage . Did he run out of meth when this happened . I was turning the boost to 17 psi and it let go after the I let off the gas. What kind of gaskets do you use . I heard felpro are not as good as they once were

 

[turbo nasty]

Countless times I have heard knock on these cars and never see a thing on SM or gauges or even PL for that matter.

 

[SHADOWII]

It might be a good idea to check for surface flatness and continue w/the fel. 9441's until things get sorted out. They make for good insurance
against unintended crank removal.

 

[Ttype6]

Sounds like it had some serious knock to cause that kind of carnage . Did he run out of meth when this happened . I was turning the boost to 17 psi and it let go after the I let off the gas. What kind of gaskets do you use . I heard felpro are not as good as they once were

Do you run meth injection?

 

[turbo nasty]

Also, ad a extra washer (total of 2) on the midlength studs as they are on the verge of being to long, otherwise you will be torquing on the shoulder of the studs vs the threads.

http://www.jegs.com/i/ARP/070/200-8530/10002/-1

 

[nouseforaname]

Yeah I have meth and it was on and full . I run it with the premium 91 the chip I ordered had 94 octane rating . The 2nd washer is a very good tip . I'll order that right away. I had the heads sent to the machine shop and they found they were out 3.5 thousand so I had them both plained flat . That's for the info folks updates will follow