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Posted: Sun Nov 13, 2005 11:21 am 
Getting Side Ways
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Location: Rosebud
VIC, Australia

why does the tourque of the headbolts matter so much? cant you just go to factory specs?

 

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Posted: Sun Nov 13, 2005 5:13 pm 
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maybe they loosen... the torque specs from the factory were not intended for use with a turbo
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Posted: Mon Nov 14, 2005 1:30 am 
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Ride: eb falcon

Location: kadina
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if youve read the article on this car you will know they had big trouble holding the gasket in, they came up with their own torque which had not yet failed, after 40+ 400m runs

 

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Posted: Mon Nov 14, 2005 7:16 pm 
Getting Side Ways
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ah ok, thanks for that fellas.

 

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Posted: Tue Nov 15, 2005 11:38 am 
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Its the head bolts that stretch anyway..Causing head to lift...

 

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Posted: Tue Nov 15, 2005 5:51 pm 
Getting Side Ways
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Location: kadina
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EBXR8380 wrote:
Its the head bolts that stretch anyway..Causing head to lift...

whats your point?

apparently the problem can be fixed with a different torque

 

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Posted: Tue Nov 15, 2005 5:52 pm 
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Ride: Falcon EB-s

Location: Manjimup
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Does anyone know what grade the headbolts are? Id be wondering whether getting grade 9 bolts would solve some of the problems or something?

 

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Posted: Tue Nov 15, 2005 11:57 pm 
Getting Side Ways
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ebs_4l wrote:
EBXR8380 wrote:
Its the head bolts that stretch anyway..Causing head to lift...

whats your point?

apparently the problem can be fixed with a different torque

With the expansion and contraction of alloy which is heaps, it breaks down the stretch or elastisity of head bolt..
BUT on high power boost engines the bolts simply stretch and head lifts!!
Often head gasget gets blammed, multy layer metal gagstes helps this issue as they don't blow out..But the issue with head bolt stretch or head lifting is still an issue... Ford have upgraded there head bolts lately anyway and ALWAYS use new head bolts!!! With molly grease under threads and washer...As the alloy tends to grab ....
If you think the 6's have issues the V8's with boost its a real concern 3/8 " bolts and there's four of them....

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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Posted: Wed Nov 16, 2005 1:19 am 
Getting Side Ways
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yes, i realise all that, but, regardless of all the theories involved, using the different settings stopped the gasket blowing problem

 

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Posted: Wed Nov 16, 2005 3:28 pm 
Getting Side Ways
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Power: 315 rwkw

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ebs_4l wrote:
yes, i realise all that, but, regardless of all the theories involved, using the different settings stopped the gasket blowing problem


Or more likely delayed it
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Posted: Sat Nov 19, 2005 1:20 am 
Getting Side Ways
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We used aftermarket bolts from memory we torqued to 40 Lb then 90 *...With a bloody long 2" bar....

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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Posted: Sun Nov 20, 2005 10:14 pm 
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Joined: 14th Jun 2005

Ride: EB

Location: sydney
NSW, Australia

If i was building an engine or had the head off the car,i would use arp head studs...they would be stronger than most bolts...
what about using XR6 turbo head bolts? do they fit?
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Posted: Mon Nov 21, 2005 12:42 am 
Getting Side Ways
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Ride: eb falcon

Location: kadina
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i rekn the head bolts r metric, so arp is out of the question... dunno bout 6t bolts, ill look into it

 

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