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N/A Power
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Discussion Starter #1
Well today I decied to retorque my head while I was swapping out my injectors.
8000km ago a new gasket was put on and both of the surfaces were machined. The arp bolts were torqued somewere in between 80-90 ft/lb.

So i set the wrench at 85 ft/lb and I could turn each bolt at least 1/4 turn, is that normal?

I would also like to hear your exp. in retorquing the head

Thanks
 
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sorcereur said:
Well, u didn't retorque it properly. U're suppose to loosen all the bolts in the proper order, then torque them again.
Loosen the head in this order: 3rd pic on this page... http://www.cygnusx1.net/supra/library/TSRM/em/EM_39.gif
And then retorque then in this order: 3rd pic as well...
http://www.cygnusx1.net/supra/library/TSRM/em/EM_55.gif

Don't go straight to 85ft/lbs. Start at 30ft/lbs, then 50, then 65, then 75, then 85. Go to 90ft/lbs if u're using ARP bolts.
Are you supposed to loosen all the bolts at the same time or loosen one bolt then torque it down to spec? Then go to the next bolt in order loosen it and retorque?
 

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To get a proper torque reading when you tighten them back down because it takes more then 85ft/lbs to break the bolts loose from thier current position.
 
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yeah i just did the same...but I did mine on a stock hg...retroqued to 72ft lbs...i know you dont loosen the stockers b4 u retorque..not sure about the arp's
 

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i dont think that method would kill anybody. However, isnt 85-90 ft. lbs a bit high for a stock HG?
 

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greensupra_87 said:
Actually it is a stock hg, I figured it should br enough since I'm not planning to go turbo. Is 90 ft/lb really too much?

Main consern here is that they were loose...
I have a turbo and I torqued my ARPs to 85ft/lb for a MHG as recommended by the ARP company. The reason being that the max is reached at that # to avoid warping our aluminum heads. If you want to supercede the manufacturer's recommendation and risk warping then tighten away.
 

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greensupra_87 said:
Main consern here is that they were loose...

I dont know how much a quarter turn means, but it is sometimes common for head bolts to need a retorque after about 500 miles, after you do it the first time the gasket seats, everything kinda settles into place, letting some stress off the bolts. I dont think you have to worry about them rattling loose on you though.
 

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OK, I'm planning on retorquing my stockers w/stock bolts, so this is what I get from this thread.... I follow the untorquing sequence, then retorque following the retorquing sequence. Is this right? I plan on retorquing my stockers to 72 ft/lbs.
 

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loosening or not is a big debate, so....

if you decide to loosen:
1. follow the correct sequence
2. slightly loosen first one, tighten to preferred torque
3. slightly loosen second one, tighten to preferred torque
4. and so on
 
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