Missing intake manifold bolt stud/bolt?

[dkmcgowan]

This is an 89 40L Renix...

 

I am tracking down a low/rough idle issue and went to tighten my intake/exhaust manifold bolts.

 

I noticed what appears to be a stud missing?

 

It's the lower bolt hole on the front exhaust manifold.

 

[rearview]

One of those known jeep defects.

 

I ran mine for 20 years without the stud .

 

It tighens the exhaust side, so you won't find a vacum issue, 

 

Easy to get out once you have a direct straight line access to the broken stud. Not machine grade metal.

[dkmcgowan]

I don't seem to have an exhaust leak...  Seems like I would have to take everything out to get at it, going to leave it for now.

[rearview]

I waited until  the head come off in a rebuild.

[87Warrior]

My guess is the stud is not missing, it is snapped off. My 86 is in the same boat.

[Strokermjcomanche]

You can use a bolt instead of the stud without removing anything as long as the stud is not broken off in the head . Use something to stick inside the hole or a mirror on a stick to see if it's missing or broke .

[reubj]

Mine had been twisted off flush with the block. Eventually the gasket deteriorated and caused an exhaust leak. When I replaced the gasket I drilled it out and re-tapped it for a new bolt.