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Removing head bolts to fit bracket
Posted: Tue Feb 02, 2010 7:19 pm
by Rangie Thing
Hi all i am changing engines at the movent and the alt, ac, ect on the old engine bracket is bolted with two head bolts, would it be worth unbolting the two head bolts and then touque them back down or would it be better to make a new one.
Thanks Rick
Posted: Wed Feb 03, 2010 1:29 pm
by mikesmith
are the bolts on the head torque to yield?? if they are prob not the best idea.
Posted: Wed Feb 03, 2010 7:12 pm
by beinthemud
What engine, what age
Posted: Wed Feb 03, 2010 7:35 pm
by PJ.zook
I wouldnt be touching them head bolts at all for the sake of a bracket.
Posted: Wed Feb 03, 2010 9:03 pm
by Rangie Thing
The engine is a nissan sd33-t 1984. I think i will make a new bracket and mod the old one as it also bolts to the front of the water pump making it a big job to change the that too.
Posted: Wed Feb 03, 2010 10:52 pm
by mavzilla
I would pull them out and then just retorque to specs. have done plenty of times on old stuff, never had any problems
Posted: Thu Feb 04, 2010 11:38 am
by mhgill
If ist just 2 bolts in a SD33, I'd remove them and re tourqe to spec + a smidge more to be safe
Posted: Thu Feb 04, 2010 12:34 pm
by LuxyBoy
Head bolts are meant to be done in a specific sequence; if you are going to remove two you should remove ALL and then re-torque the whole head in sequence to factory spec.
Posted: Thu Feb 04, 2010 4:00 pm
by RAY185
LuxyBoy wrote:Head bolts are meant to be done in a specific sequence; if you are going to remove two you should remove ALL and then re-torque the whole head in sequence to factory spec.
For initial torque down this is true. I don't think it's going to worry it to remove 2 bolts and retorque to spec. The 2F cruiser motor is similar in that the air cleaner bracket is retained by 2 head bolts. I have removed and refitted as above with no dramas. Either way, if you solve your problem without removing them easily enough then don't.
Posted: Thu Feb 04, 2010 9:31 pm
by Rangie Thing
Been looking at the bracket tonight and think i will be able to make it fit without removing the headbolts, and it should make much easier to remove the head or water pump without pulling half the engine apart too.
Posted: Sat Feb 06, 2010 4:05 pm
by PGS 4WD
mhgill wrote:If ist just 2 bolts in a SD33, I'd remove them and re tourqe to spec + a smidge more to be safe
Never over tighten a head bolt, a torque to yeild bolt will loose massive amounts of clamping force if tightend beyond specification. Clean threads and an appopriate lube are all that is required.
Joel