LLY Thermostat housing Bolts

[JAG91761]

Wondering if this has happen to anyone else? I am replacing my thermostats and when putting everything back together the 4 bolts that hold the thermostat housing just spins. Tried new bolts and still the same issue. I am guessing that I have to re thread the holes?

 

[Foxtrott4646]

Could be chewed up threads, what does the start of the threads on the bolts look like?

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[JAG91761]

The start of the bolts look fine. But I’m just a regular joe with basic mechanic skills lol

 

[Foxtrott4646]

Is this the first time the bolts have been out of the block?

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[JAG91761]

3rd time

 

[Foxtrott4646]

Are the bolts going all the way into the holes?

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[JAG91761]

Yes they are and when I try to tight them up so I can torque to spec they just keep spinning

 

[Foxtrott4646]

I would bet that theyre stripped out, time to tap new holes

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[JAG91761]

Thanks fox trott 4636, just left harbor freight with tap kit.

 

[duramaxzak]

Probably stripped out, it would be best to use a helicoil kit so you can still use the factory size bolts.

 

[JAG91761]

I was not successful in taping the holes. Can I replace the bottom half of the housing?

 

[Foxtrott4646]

You mean where they bottom out in the manifold?

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[frankenstien]

The bottom of that is a big Y it goes to each head, yes you can replace it, just more work

 

[JAG91761]

Found my answer guess I can replace it


https://www.ebay.com/itm/01-02-03-0...-LLY-LBZ-LMM-Thermostat-Housing-/202615672957

 

[Capt. Jim]

@duramaxzak has the easiest solution. Get a helicoil kit for that size bolt.

 

[JAG91761]

I need to replace my thermostat housing crossover, dealer says my part is discontinued. I did find a part that match up, my only concern is for an LMM. My truck is LLY.

 

[Bdsankey]

I need to replace my thermostat housing crossover, dealer says my part is discontinued. I did find a part that match up, my only concern is for an LMM. My truck is LLY.

Or do what others have said previously in this thread, use a helicoil kit.

 

[JAG91761]

Thanks for the feedback. But I messed up and I need to replace or make bigger holes. My mechanic skills are not the greatest

 

[duramaxnate]

What year truck?
I might have one here at the shop if you need one.



MODS: If not appropriate, please remove.

 

[JAG91761]

It’s a 2004