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head bolt tension 

 

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 Post subject: head bolt tension
Posted: Thu Jul 07, 2005 4:50 pm 
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just replaced my Headgasket on my EF with an AU metal gasket,
which head bolt tension should i use EF spec OR AU spec.

 

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Posted: Thu Jul 07, 2005 4:54 pm 
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I dont know the answer to your question, but can I ask how much was the headgasket ?

 

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Posted: Thu Jul 07, 2005 5:08 pm 
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emerald ford: $177 including intake and exhaust gasket and Au rocker cover gasket which does not fit ef rocker cover.

 

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Posted: Thu Jul 07, 2005 10:23 pm 
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i got just the gasket for $60

 

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Posted: Fri Jul 08, 2005 1:25 am 
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i have eb2 i just did what the ford book said cant be much different i hope
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Posted: Fri Jul 08, 2005 2:22 am 
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think its 40nm then 1/4 turn
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 Post subject: Re: head bolt tension
Posted: Fri Jul 08, 2005 2:31 am 
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voids wrote:
just replaced my Headgasket on my EF with an AU metal gasket,
which head bolt tension should i use EF spec OR AU spec.


AU Spec, most of the EF/EL head gasket issues were due to insufficient torquing anyhow.

All of my heads are done to 90nM and 180*, rather than 45nM and 90*

 

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 Post subject: Re: head bolt tension
Posted: Fri Jul 08, 2005 12:56 pm 
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Waggin wrote:
voids wrote:
just replaced my Headgasket on my EF with an AU metal gasket,
which head bolt tension should i use EF spec OR AU spec.


AU Spec, most of the EF/EL head gasket issues were due to insufficient torquing anyhow.

All of my heads are done to 90nM and 180*, rather than 45nM and 90*

90nM and 180* dont you fear of snapping the head bolts, rang ford and they recon to use AU spec of 30nM and 120*

 

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Posted: Fri Jul 08, 2005 1:15 pm 
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As a matter of interest, about 7 years ago when I had to do the head gasket on my ED (due to water leak at the exhaust side of the head) I had to use a blood big piece of pipe on the end of my 1/2 inch drive breaker bar to loosen the bolts - they each came with a loud "SNAP" and "CREEaaaK!". Every single one was DRY on the threads - in fact there was light rust on the threads.

In short - IMO my particular head gasket blowing was due to FACTORY f**k!!! The bolts are meant to be torqued with the threads lightly oiled - put in dry there's no way they ended up with sufficient clamping force on the head.

 

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Posted: Fri Jul 08, 2005 8:16 pm 
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all bolts being torqued are meant to be lightly oiled to avoid binding, the bolts on the exaust side will always be harded to undo due to that side being alot hotter than the intake.
Torquing the head up to 90nm then another 180 deg turn, your head would be like a crinkle cut chip!!!
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Posted: Sat Jul 09, 2005 3:06 am 
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Stage 1 40nm
Stage 2 80nm
Stage 3 110nm
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Posted: Sat Jul 09, 2005 10:06 am 
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What about a turbo motor? I want to re-torque mine and am wondering if I should go alot tighter?
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Posted: Sat Jul 09, 2005 11:22 am 
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These are torque to yield bolts.Go over there stretch and they loose tension properties...
On some engines the the bore can be pulled in all directions...Distortion is an issue...

 

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Posted: Sat Jul 09, 2005 3:01 pm 
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joolz wrote:
all bolts being torqued are meant to be lightly oiled to avoid binding, the bolts on the exaust side will always be harded to undo due to that side being alot hotter than the intake.
Torquing the head up to 90nm then another 180 deg turn, your head would be like a crinkle cut chip!!!


My point was that I wonder seriously if the EA-ED "Notorious for blown headgaskets" syndrome hasn't been due simply to factory stuffup - ie. my car's engine was definitely assembled with the head bolt threads dry so no, there's no way they'd have had sufficient tension.

As far as the specific torques then obviously it'll depend on the type of gasket being used - those procedures of 90/180 or even 30/120 I'd suspect are for the metal type AU gaskets - tho I've gotta admit that 90/180 seems extreme even for that. I'd use the most recent Ford recommendation.

 

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Posted: Sun Jul 10, 2005 6:47 pm 
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