351 head bolt torque specs

[climbinggod]

Anyone know the torque specs for a Ford 351w HO Indmar engine. I had to undo the 2 bolts that hold the throttle cable bracket on.

[Covi]

I am a huge fan of tightening per torque specs! I don't know the answer, but I'm sure it will be along shortly! Great question!

[BrianM]

According to my Ford small block rebuilding book it should be 55 -65 ft lbs

[climbinggod]

Originally Posted by BrianM

According to my Ford small block rebuilding book it should be 55 -65 ft lbs

Thanks Brian

[Laurel_Lake_Skier]

Looking at my Indmar manual, the 55-65 is for the 302. 351 says to tighten in steps. First to 85 ft/lbs then a final to 95 ft/lbs. The 351 uses larger 1/2" bolts. Also, there is a tightening sequence, starting in the center and moving out.....not sure what effect pulling out one or two bolts will have on needing to follow the sequence.

[JLeuck64]

I am thinking those 351's used INTAKE manifold bolts to hold the throttle cable bracket in place. If so, the specs for them would be a lot less than a cylinder head bolt...

[climbinggod]

Check this info: http://www.marineparts.com/mpf/mpf520.aspx

[denverd1]

make sure you have head bolts not intake manifold bolts. did you take off a valve cover? or go below it?

head bolts should be tightened in sequence to torqued to specs. USING NEW BOLTS. YOU CAN'T REUSE HEAD BOLTS.

My guess is you have intake bolts, not cylinder head bolts. post a pic, we can help.

[TRBenj]

Originally Posted by JLeuck64

I am thinking those 351's used INTAKE manifold bolts to hold the throttle cable bracket in place. If so, the specs for them would be a lot less than a cylinder head bolt...

Agreed- I would say that they used an intake manifold bolt as well. I guess its possible that they used a valve cover bolt, but definitely not a head bolt!

[climbinggod]

Here is a picture of the rear of the engine. You can see the black throttle cable bracket mounted on the top of the engine. Any help to you? Manifold or head bolt??