bigpest88

Hey guys, I was wondering what causes a head gasket to blow? I replaced my head gasket on my 95 4Runner a year and a month ago, and it gave out on me again. It blew out when it han about 143,000 miles on, now 16,000 miles later(159,000) it blows again!!! It has never over heated on me since I replaced it the first time. I drove to lunch fine, then when I got out of lunch I went to turn it on and all it did was click twice, then started fine. But after i backed out of the parking lot, and was about to get on the street, a bunch of white smoke came out of my exaust. I pulled in to the parking lot next to it, open the hood and checked the radiator, and sure enough, it was low. So im more than sure its my HG. This FREAKEN SUCKS!!!! So back to my question,what causes it to blow?

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__________________
Dont you just love it when they go down on you,
But hate it when they go back up....
Damn those gas prices.....

ChickenLover

I'm assuming that you're talking about the 3.0. Did you replace the head bolts during your first repair?

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95 4Runner, 3VZE , 141k, 4WD, Auto. (Head gaskets replaced at 106k)

Tecxasdave

I'm in the same boat. I've got the 3.0 and losing water fast. Looking forward to learning as to why, I just bought mine, so I can only assume that the previous owner got it hot before.

Chicken, I understand that it is a must to use new bolts when replaceing the heads. I'm curious as to why this is so important?

bigpest88

Yeah, I did replace the head bolts.

__________________
Dont you just love it when they go down on you,
But hate it when they go back up....
Damn those gas prices.....

regularguy412

The head bolts from the factory are torque-to-yield. Once they stretch, they don't go back.

Mike in AR

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1992 3.0 A340H auto tranny 4Runner, 31 x 10.50 Michelin LTX M/S tires on stock aluminum wheels, P235 Yokohama Geolandar G051 tires on stock silver steel wheels. 4.56 Gears Bone stock.

1999 4-cylinder Camry auto tranny (daughter's car)

2002 4-cylinder Camry Solara VVT auto tranny (my car)

1976 Chevy SWB Pickup Inline 6-cylinder, 1-Barrell carb w/ auto tranny [came stock with NO dome light] (weekend hauler)

RustBucket

Really? Is this the case with the 22re as well? Did I screw up bigtime by reusing my head bolts?

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Rust-Free '88 Runner. Stay-at-home truck.

AH64ID

Nope, your OK reusing 22RE bolts

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-John
'05 Dodge 3500 SRW 4x4 SLT 5.9 Cummins QC LB NV5600
2003 SR5 4Runner, V6 4WD. 1" cornfed lift
Previous Toyota's '92 Red Truck NALA

Speed doesn't kill, its the sudden stop that hurts.

RustBucket

*phew*!

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Rust-Free '88 Runner. Stay-at-home truck.

ChickenLover

Good. Two more questions: What brand of gasket did you use ? Did you check for head and block warpage?

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95 4Runner, 3VZE , 141k, 4WD, Auto. (Head gaskets replaced at 106k)

Cebby

The headgasket issue on the 3.0 is caused by the stock exhaust manifold and crossover pipe superheating the rear driverside of the engine (can't remember which cyl # this is). Headers alleviate this problem.

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UZswap.com
A site dedicated to sharing info for swapping the Toyota/
Lexus UZ (V8) engines into Toyota Trucks and 4Runners.

My 4Runner
1993 4Runner, 1UZ (V8) auto dual ultimate crawler, double locked, 35's on beadlocked SR5 alloys,
low lift, hacked fenders, tubbed firewall, custom armor

TOOLandFAB.com
A discussion forum dedicated to tools, fabrication & workshops. See my JD2 Bender Hydro Conversion

Snorkeldepth

Jasper uses these on their "remanufactured" engines. I heard that these are the new gaskets that Toyota uses. Is it? Whether or not, have 3.0 owners had good experience with them?


From the Jasper website:

GRAPHITE HEAD GASKETS:pliable material that does not tear when casting
expand and contract. Graphite gaskets transfer heat evenly and will
not deteriorate around water passages like Kevlar gaskets do.

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1990 SR5 V6 Standard Cab Short Bed 4X4 5 Speed

bigpest88

I cant remember, I think they were the ones from O'reillys. I also had my heads machined.

__________________
Dont you just love it when they go down on you,
But hate it when they go back up....
Damn those gas prices.....

bigpest88

Bump...

__________________
Dont you just love it when they go down on you,
But hate it when they go back up....
Damn those gas prices.....