Exhaust manifold bolt size?

[dhaumann69166]

Quite a few of the exhaust manifold bolts have come loose and fell out on my 6.5 in my Humvee. Does anyone know what size they are? I haven’t had much luck looking them up online. I think they are 10.9x1.5....maybe???? Any help would be greatly appreciated

 

[porkysplace]

Do you know the NSN number ?

https://www.parttarget.com/

Running the NSN through parttarget usually gives you the bolt specs , I've really never worked on 6.5's
so not much help without a part number or NSN.

 

[Action]

Do you know the NSN number ?

https://www.parttarget.com/

Running the NSN through parttarget usually gives you the bolt specs , I've really never worked on 6.5's
so not much help without a part number or NSN.

If he gets in the TM to get the NSN, he may as well just read the description.

 

[HoveringHMMWV]

My search at KASKAR using the part # / NSN yields the following result....

Bolt, Flange, M8-1.25 x 60

Real4WD - 5744435 - Bolt, Flange, M8-1.25 x 60 5306014382322, NSN 5306-01-438-2322

real4wd.com

HTH,
- HoveringHMMWV

 

[juanprado]

If 10.9 is on the head of the bolt, that is the hardness in metric like grade 8 in sae.

 

[dhaumann69166]

My search at KASKAR using the part # / NSN yields the following result....

Bolt, Flange, M8-1.25 x 60

Real4WD - 5744435 - Bolt, Flange, M8-1.25 x 60 5306014382322, NSN 5306-01-438-2322

real4wd.com

HTH,
- HoveringHMMWV

Those aren’t the right bolts. The factory bolts have a round head and take an Allan wrench.

 

[gringeltaube]

If it's a N/A 6.5L (non-turbo) the bolts are Allen-head 12.9-grade M10 x 1.5 x L25mm.
The turbo version HMMWV 6.5L takes 10.9 flange hex-head bolts, 10.9 M10 x 1.5. Shorter ones are 45mm long; the longer ones measure 65mm.

 

[dhaumann69166]

Than

If it's a N/A 6.5L (non-turbo) the bolts are Allen-head 12.9-grade M10 x 1.5 x L25mm.
The turbo version HMMWV 6.5L takes 10.9 flange hex-head bolts, 10.9 M10 x 1.5. Shorter ones are 45mm long; the longer ones measure 65mm.

View attachment 844411

Thank you!!!!