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Old 08-28-2007, 11:04 AM   #1
rogue
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Question Torque spec for cam cap bolts?

Arg!

I'm reassembling an old EJ25 DOHC, and have all the specs for head bolts and timing belt and such... but I'm missing the torque spec for the cam cap bolts (small bolts that hold the cam shafts in place on the heads, 6 per cam)

Anyone? Theory is 7-11 ft-lbs.

Thanks!
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Old 08-28-2007, 11:20 AM   #2
conker69
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EDIT!!!


7.0 ft/lbs for the two bolts near the belts. It's 14 ft/lbs for the 4 bolts towards the car body. The order is middle two bolts, front-most bolts, then rear-most bolts. See below and remember to tighten them in at least 2 stages.

G C L
E A K


F B J
H D I

Last edited by conker69; 08-28-2007 at 03:28 PM.
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Old 08-28-2007, 12:15 PM   #3
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Quote:
Originally Posted by conker69 View Post
7.0 ft/lbs.

I assume you know they should be tightened in two stages and in a specific order??
I guessed as much...

Any info on the order? Just rotating around like the head bolts?

I don't see why it would matter too much what order they're done in, since it's three separate cam caps being held down. Not like with the head when you have one giant mating surface.
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Old 08-28-2007, 12:46 PM   #4
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For 2.5 I only have what's in the Haynes manual.
According to it, the tightening sequence is
5 1 3
6 2 4
for each of the camshafts.
Left is front.
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Old 08-28-2007, 12:49 PM   #5
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Quote:
Originally Posted by avk View Post
For 2.5 I only have what's in the Haynes manual.
According to it, the tightening sequence is
5 1 3
6 2 4
for each of the camshafts.
Left is front.
So pretty much like the head. Thanks, I appreciate it guys!
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Old 08-28-2007, 01:05 PM   #6
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WAIT!!!


Just did it on mine.

The front caps, behind the cam gears are only 84-96IN lbs, and the middle and rear are just over 120in lbs, or 10 - 11ft lbs.

Kinda wierd but that what SOA recommends.
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Old 08-28-2007, 01:15 PM   #7
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Quote:
Originally Posted by fishheadback View Post
WAIT!!!


Just did it on mine.

The front caps, behind the cam gears are only 84-96IN lbs, and the middle and rear are just over 120in lbs, or 10 - 11ft lbs.

Kinda wierd but that what SOA recommends.
Okay, I'm not surprised to hear that... speculation was the fronts were different because of the cam seals.

Though really, the difference between 90 in-lbs and 120 in-lbs is pretty darn small. But I'll keep that in mind, thanks.
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Old 08-28-2007, 03:26 PM   #8
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CHECK MY EDITS!!!!

Sorry.
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Old 08-28-2007, 04:01 PM   #9
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Quote:
Originally Posted by conker69 View Post
CHECK MY EDITS!!!!

Sorry.
Got it!

Thanks a lot, I appreciate the level of effort you guys put in. I will follow the instructions diligently (breaks out in-lb torque wrench)

However, for the sake of argument, I'd guess that doing about 90 in-lbs all around in any random order would PROBABLY work fine. These are very small forces at play. Not that I want to be the guy to test it.
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Old 08-28-2007, 06:51 PM   #10
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How old is old? The 96 EJ25D uses smaller bolts and a lower tq value than the later EJ25D. The smaller bolts are very prone to stretching as well. Check yours before you put them back in to make sure they aren't stretched or they won't hold correct tq (if they even make it there).

Just a heads up!

Jay
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