Head Bolt Torque Confusion

Hi TacomaWorld. Ive been stalking this place for a few years, but figured I better join when my head gasket started to leak. After a lot of painfully rusted bolts, its all going back together. Problem is confusion with head bolt torque. Factory service manual isn't 100% clear. My interpretation is different from two other advisors who have both spent a large amount of time working with engines and machines. This is the first time i'm doing a head gasket so its a learning curve.

Could I get opinions on the correct way to torque these bolts? I have already torqued it down to 29 ft-lb, then turned it 45degree's, torquing it to 40 ft-lb. Then under pressure from advisors went to installing camshafts. I am doubting if the torque was enough or too much. My engine is a 2005 2.7L 2TR-FE.

 

45 degrees and 40 ft/lbs?
Where did you get that?

The directions say, 29 ft/lbs in the order shown.
Then turn the bolts 90 degrees in the order shown.
And then one more additional 90 degrees again, in the order shown.

If done correctly, the you will have turned the bolt 180 degrees.
I used to use a dot of paint on the bolts to help me track the “degrees”.
My paint was “white out”

 

Not sure what the confusion is, it tells you exactly how to torque them in service info which you posted.

 

its 29, 90 degrees, 90 degrees, thats it. I just paint marks as a reference, no fancy tools.

 

You’re 1,350 degrees short.

135 (180 minus the 45 you did turn them) x 10 head bolts.

Turn them an additional 45 degrees in order.

Then turn them an additional 90 degrees in order, and you’ll be there.

In other words, get your head screwed on straight man!

 

Thanks you all, so its the same thing I keep reading. I torqued it 45degree's, which brought it to 40 ft-lb, so the final "torque spec" would be around 70 ft-lb?

I think my confusion is the fact a torque spec has been given, but its only half of what the torque is supposed to be.

 

Initially torque to 29 ft. Lbs. Then put the torque wrench away. You won't need it again.

Mark the bolt heads. Then rotate the bolt heads 90 degrees in the correct order. Then rotate an additional 90 degrees, in the correct order. At this point bolts should be 180 degrees from where they started.

There is no final torque spec given in the specifications. Just the 29 ft. Lbs and the two 90 degree rotations.

 

OK thank you, had I just followed the instructions I wouldn't be asking this...

This leads to my next question. If I have already tightened to a weird value that makes no sense, should I go back and re-tighten the bolts as described by landphil, or should I take the head back off, reset the FIPG and put the head back on with the proper torque then 2 quarter turns with a regular wrench? Im asking since it will be almost 24 hours since I initially put the FIPG down.

 

Start over. 100% easy enough to redo the sealant as well.

 

You need to do this. ^

There is no other right way.

You need to forget about final torque numbers. The head bolts were designed to be tightened to a certain “stretch” point. Not a torque number. That’s why you are using degrees.