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Replacement Of Head Bolts. Possible?

MJTru

By MJTru,
in Engines & Forced Induction

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MJTru Mentor

MJTru

Posted
Posted

I would like to know if anyone has done this before. Recently i installed a MLS head gasket on my rb26 but reused the stock head bolts. I was reading around the net and learned that these stock head bolts can stretch and cause the head to lift at around 25psi.

What im wondering is can i drain the coolant out the block and remove one stock bolt at a time and replace them with ARP head studs, torque all to factory specs first then after all is replaced move on to the arp torque specs. Im wondering if this will work insted of approaching it like a head job. Engine is fresh with only 2300km on it. I never new these bolts were that limited so never thought to use ARP Studs. Funds were also an issue at the time.

Thanks in advance.

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https://www.sau.com.au/forums/topic/458363-replacement-of-head-bolts-possible/
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r32-25t Grand Master

r32-25t

Posted
Posted

You can't reuse Nissan head bolts any way. They are torqued to yield and don't clamp the head down properly if reused

But yes you can replace them one at a time, infact this very question was asked in this section only a couple of weeks ago

Franko07 Enthusiast

Franko07

Posted
Posted

While on this subject which is a better way of putting in the arp studs. Is it better to take one out at a time in order of how the fsm says to remove the bolts or the way arp wants you to install them? Or doesnt it matter? In other wards do you put them in from the outside in or the inside out?

GTRPSI Mentor

GTRPSI

Posted
Posted

Head bolts are tightened down from the middle outwards.

Id be starting from the middle and working my way outwards like the OEM tightening sequence to keep to this method.

Just like when you go through the steps as you torque up the bolts.

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Franko07 Enthusiast

Franko07

Posted
Posted

Kool makes sense to me. So whats the theory behind doing one stud at a time? Wouldnt it be easier to loosen the entire head and put them all in? Seeing as you dont have to take the cams out like sr's or are people trying to do this with coolant still in their engines and dont want it to leak out or something?

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