Engine Torque Specs

[HotRaud90]

In search of some torque specs that I haven't been able to dig up on the interwebz.

I'm looking for the following:

- Upper plenum to lower intake manifold
- EGR to upper plenum bolts
- Throttle body to plenum
- Cam covers to heads (I think this is somewhere in the 75-100 in-lb range)

I looked on late model restoration's website for some of the specs and found that plenum to intake manifold was 71-106 ft-lbs., but I promptly snapped one of the bolts in half while trying to torque it down to 100 ft-lbs. Figured it can't be right, but maybe it is and the bolt was weak. Could be the fact that some of the Mustang upper plenums aren't the same as the Marauder.

Couple of questions: can you reuse the metal gasket between the EGR and the upper plenum? I had to remove mine to get to the broken bolt.

Also, is it normal for the cam covers to not touch the head surface? I torqued them down to 100 in lbs and I can still just ever so slightly see the gasket in between the cam cover and the head. They're close, but definitely not touching.

Thanks in advance!

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[musclemerc]

100ftlbs? That's enough to hold a wheel in place.

You got the wrong information, why didn't you think to question it?

[Joe Walsh]

In search of some torque specs that I haven't been able to dig up on the interwebz.

I'm looking for the following:

- Upper plenum to lower intake manifold
- EGR to upper plenum bolts
- Throttle body to plenum
- Cam covers to heads (I think this is somewhere in the 75-100 in-lb range)

I looked on late model restoration's website for some of the specs and found that plenum to intake manifold was 71-106 ft-lbs., but I promptly snapped one of the bolts in half while trying to torque it down to 100 ft-lbs. Figured it can't be right, but maybe it is and the bolt was weak. Could be the fact that some of the Mustang upper plenums aren't the same as the Marauder.

Couple of questions: can you reuse the metal gasket between the EGR and the upper plenum? I had to remove mine to get to the broken bolt.

Also, is it normal for the cam covers to not touch the head surface? I torqued them down to 100 in lbs and I can still just ever so slightly see the gasket in between the cam cover and the head. They're close, but definitely not touching.

Thanks in advance!


100ftlbs? That's enough to hold a wheel in place.

You got the wrong information, why didn't you think to question it?

Yep.....100 in-lbs not ft-lbs.

[HotRaud90]

Yes, this is all very apparent now that I have a broken bolt to testify to that fact. Didn't question it because all their other torque values seemed relevant and correct. I was zooming through snugging down quite a few sets of fasteners and just read it off quickly and began to tighten. Simple mistake that is now realized.

Anywho, back to the original question(s) in the original post. Got answers? I need 'em! Thanks to everyone that is able to share their knowledge.



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[Joe Walsh]

In search of some torque specs that I haven't been able to dig up on the interwebz.

I'm looking for the following:

- Upper plenum to lower intake manifold : 89 in-lbs
-
EGR to upper plenum bolts : Couldn't find this in the service manual...I'll go out on a limb and say 89 in-lbs!

- Throttle body to plenum : Couldn't find this in the service manual...I'll go out on a limb and say 89 in-lbs!
- Cam covers to heads (I think this is somewhere in the 75-100 in-lb range) : 89 in-lbs
- Coil Covers are...you guessed it! 89 in-lbs

I looked on late model restoration's website for some of the specs and found that plenum to intake manifold was 71-106 ft-lbs., but I promptly snapped one of the bolts in half while trying to torque it down to 100 ft-lbs. Figured it can't be right, but maybe it is and the bolt was weak. Could be the fact that some of the Mustang upper plenums aren't the same as the Marauder.

Couple of questions: can you reuse the metal gasket between the EGR and the upper plenum? I had to remove mine to get to the broken bolt.

Also, is it normal for the cam covers to not touch the head surface? I torqued them down to 100 in lbs and I can still just ever so slightly see the gasket in between the cam cover and the head. They're close, but definitely not touching.

Thanks in advance!


See above in BOLD red.

[justbob]

Upper to lower 89 inch pounds like mentioned. All others snug. Yes you can reuse the gasket.


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[HotRaud90]

Thanks, fellas. Much appreciated.

Anyone else experienced the cam covers not fully mating to the head surface after the bolts have been torqued down properly? Seems odd, but it may be by design. I used the proper Fel-Pro gasket set recommended by Zack when doing a cam cover gasket refresh, so I know that it's not an improper gasket issue. The gap between the head and the cover is less than 1/8".

Wish I had noticed what the old gaskets looked like before I took the cam covers off, but I wasn't looking for such an issue at that time.

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[justbob]

If nothing got pinched you should have felt the soft rubber make contact. It will only compress down a very small amount. I hope you used RTV in the proper spots.

The metal spacers the bolts go thru will dictate a stopping point.


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[HotRaud90]

If nothing got pinched you should have felt the soft rubber make contact. It will only compress down a very small amount. I hope you used RTV in the proper spots.

The metal spacers the bolts go thru will dictate a stopping point.


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Rubber gasket is definitely making contact with the head. That's good to know about how much the gasket compresses. I did use RTV where the the cam covers, heads, and timing cover meet each other. Two places on each head, as far as I understand.

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[HotRaud90]

Double post

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