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Broken Connecting Rod Bolts

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Old 02-16-2011, 07:18 PM   #1
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Broken Connecting Rod Bolts

Well, I started a rebuild on my 3.4l, installed the first piston and torqued the rod caps to 25fp then 45fp and snap. I broke the second bolt I tried to torque down. I have never had this happen on a 22re. I was wondering if this was a common problem. Does anyone know if Toyota has just the bolt set like LCE or should I just get all new rods?

Last edited by trx125; 02-16-2011 at 07:19 PM.
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Old 02-16-2011, 07:41 PM   #2
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You may be overtorquing those bolts. Confirm the torque spec in the appropriate FSM:
http://www.ncttora.com/fsm/index.html
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Old 02-16-2011, 07:50 PM   #3
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I have the FSM. I am going by the book on this one, intstead of just throwing it together and see what happens!
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Old 02-16-2011, 07:59 PM   #4
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Does your FSM jive with this or am I in totally the wrong place?

From the 95 FSM for the 5vz-fe:

INSTALL CONNECTING ROD CAPS

(a) Apply a light of engine oil on the threads and under the nuts of the connecting rod cap.
(b) Install and alternately tighten the nuts of the connecting rod cap in several passes.

Torque: 25 Nm (250 kgfcm. 18 ftlbf)

If anyone of the connecting rod cap nuts does not meet the torque specification. replace the cap nut.

(c) Mark the front of the connecting rod cap nut and bolt with paint.
(d) Retighten the connecting rod cap nuts 90 degrees as shown.
(e) Check that the painted mark is now at a 90 degree angle to the front.
(f) Check that the crankshaft turns smoothly.
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Old 02-16-2011, 07:59 PM   #5
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Ooops, I goofed! Nevermind! I did over torque the bolts the main rod bearings are 45fp and 90, the rod bearings are 18fp and 90! AHHHHHHHHHHHHHHHHHHHHH!
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Old 02-16-2011, 08:01 PM   #6
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Never, ever, work on motors after 14 hrs at work and no coffee to wake you up!
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Old 02-16-2011, 08:02 PM   #7
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I wonder if I can get the rod bolts from Toyota.

Last edited by trx125; 02-16-2011 at 08:04 PM.
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Old 02-16-2011, 08:03 PM   #8
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Yup.....that happens!
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Old 02-16-2011, 08:07 PM   #9
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It's my sons fault! I can not be held responsible!
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Old 02-16-2011, 08:11 PM   #10
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Quote:
Originally Posted by trx125 View Post
I wonder if I can get the rod bolts from Toyota.
Yes, you can....about +/- $4 each...see PNC 13265 under Engine, Crankshaft & Piston. I randomly pulled up the '96:

http://www.toyotapartszone.com/Page_...ponentsIndex=9

Last edited by rworegon; 02-16-2011 at 08:23 PM.
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Old 02-16-2011, 08:19 PM   #11
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Thanks!
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22re, 34, 5vzfe, bearing, bolt, bolts, breaking, broken, connecting, install, press, rod, stud, torque, torqued, toyota

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