Overtorque error
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Senior User
Joined: Jun 2005
Posts: 321
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From: Atlanta
Overtorque error
I did something stupid. Again. I amaze myself sometimes.
2007 Ford 4.6L (Crown Vic) motor. Putting it into a 77 F100. Took it apart to check the timing chains and look at valve wear. It was darn near flawless at 170k miles.
Putting it back together, I over torqued the head bolts. Way-way over torqued (like 3x). Don’t ask, I'm embarrassed enough to have to admit it.. Found out what I’d done and have undone it. Time to start over.
Question: I know I need new bolts; do I need to replace the gaskets? They are those multi-layer steel permatorque things. I know the conservative answer is ‘yes’ but I’m pissed off I just wasted $50 on bolts and $45 on gaskets.
Would you think the gaskets were OK? I can’t imagine them compressing – they are steel.
2007 Ford 4.6L (Crown Vic) motor. Putting it into a 77 F100. Took it apart to check the timing chains and look at valve wear. It was darn near flawless at 170k miles.
Putting it back together, I over torqued the head bolts. Way-way over torqued (like 3x). Don’t ask, I'm embarrassed enough to have to admit it.. Found out what I’d done and have undone it. Time to start over.
Question: I know I need new bolts; do I need to replace the gaskets? They are those multi-layer steel permatorque things. I know the conservative answer is ‘yes’ but I’m pissed off I just wasted $50 on bolts and $45 on gaskets.
Would you think the gaskets were OK? I can’t imagine them compressing – they are steel.
More Turbo
Joined: Aug 2015
Posts: 614
Likes: 1
Were the gaskets just a completely flat sheet of steel before you installed them?
Normally, they would have at least small indentations around important features such as the cylinders, water jacket and oil return passages. And these indentations get flattened a little when you torque the head down.
I'm pretty sure you should get a new set.
$45 now or $45 + a bunch more time later when you have low compression or oil/water leak...
Normally, they would have at least small indentations around important features such as the cylinders, water jacket and oil return passages. And these indentations get flattened a little when you torque the head down.
I'm pretty sure you should get a new set.
$45 now or $45 + a bunch more time later when you have low compression or oil/water leak...
Fleet Owner
Joined: Aug 2010
Posts: 21,254
Likes: 1,656
From: Reynoldsburg, Ohio
Get over being pissed at yourself for making the same sort of mistakes all of us here have made---at least those of us being honest! 
Like already said spend the money for new gaskets or be prepared to be pissed all over again when you're re-doing this for the THIRD time.
Like already said spend the money for new gaskets or be prepared to be pissed all over again when you're re-doing this for the THIRD time.
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