Beb Help!!!!!

[kup99]

Hey guys.. Newbie here..but I was replacing my BEB on my HDT this Sat. and when I went to re-torque the bolts to 76lbs plus a 90 the bolts just kept stretching out on me and eventually would have broke had I not noticed that something was up. I was having to turn these things way too many times to get them to spec. I figure my BEB were done once before as they looked really good while I was pulling them out. Anyway I need a new set of bolts.. and idea as to where I can get them?? how much... please help... Darren

 

[CJF]

WTF is a BEB???

 

[medtro]

Big End Bearing

 

[GXO]

As in birfield? I am assuming you are talking about the bolts on the trunion bearings or the calipers? I can't recall any others that require that many fps.

 

[Japan4X4]

Part number 13265-39025

If you are in Canada try:

G&S in the B.C. Lower mainland.

ABET in Burnaby.

4WheelAuto in Edmonton

ENS industrial in the really flat parts there in the middle.

The 1HZ and 1HD-T share this part.

I have never heard of reusing con rod bolts. Even the cheap Chevy stuff is taken into the plastic region, always replace them.

Also posting in the 80 series section with a 1HD-T question will do you little or no good, try the diesel tech forum.

 

[crushers]

you can reuse the con rods, it is done all the time when replacing the BEB...

FSM EM-111 section 9B:
Install the contecting rod bolts
HINT:
the connecting rod bolts are tightened in two progressivve steps.
if any of the bolts break or deform then replace them.
(a) apply a light coat of engine oil on the threads (important) and under the heads of the connecting rod bolts
(b) 1st using a SST install and alternatively tighten the bolts of the connecting rod cap is several passes.

TORQUE: 375 kg-cm (27 ft/lbs)
if any of the connecting rod bolts does not meet the torque specification, replace the cap bolts.
(c) mark the front of the connecting rod bolt with paint
(d)2nd retighten the connecting rod bolts by an additional 90 degrees
(e) che4ck the painted mark is now at a 90 degree anle to the front
(f)check the crankshaft turns freely...

comparing this to a chevy is just wrong...

 

[kup99]

thanks to those who know what they are talking about!!

Japan4x4 thanks for the part number and the list of retailers..

Crushers... thanks again for the steps.. the only thing I have a question about is the torque value that you put.. 27ft/lbs ??? please clarify if you can... I thought It was 76ft/lbs plus 90.. thanks for the help!!!

Also I am in Calgary Alberta, and appreciate all of the help guys.. thanks again!!

 

[crushers]

that is the torque spec in the manual...

76 ft lbs is the main cap bolts, not the rod caps

 

[kup99]

Thanks again.. really appreciate the help...

 

[Japan4X4]

Wayne is correct, the manual does not indicate that this is a non-reusable part.

However. I suspect that the rod bolts are a 1.25mm pitch, the 90 degree rotation is a stretch measurement. If the span from the base of the bolt head to the nut is say 30 mm this equates to a 1% strain. This is a pretty large strain and depending on the steel may or may not be out of the linear elastic range and into the plastic range.

These bolts are not expensive. I would replace them.

You can find a lot of opinions both ways:

http://www.google.com/search?hl=en&lr=&q=reusing+conrod+bolts&btnG=Search

However the best opinion is to measure your old bolts and compare to new ones, if you have permenantly stretched them then toss them. Simple enough.

 

[kup99]

thanks again for the help... turns out I was torquing to the wrong specs.. I was torquing the rod caps to the 76ft/lbs plus 90 which I now know that I should only be torquing to 27ft/lbs...oops on me.. big oops... but I will replace them and start again as soon as I get new bolts.. thanks for the trouble shooting help..

 

[kup99]

so just so I read this right the rod caps should go 27ft/lbs then a 90 degree turn?? thanks guys!!

 

[JDMGoodness]

Darren

Yes. That is correct. It is quite clear in the FSM about that value. I wish I had that manual at the shop instead of the Ellery. Not that the Ellery was wrong it's just in black and white in the FSM.

Check your PM's.