Intake manifold rear stud

[LXMarksTheSpot]

I was removing my intake manifold tonight. The rear driver side stud came off with the nut. There is no damage to the stud, it came out clean. From the looks of it, it seems the nut on the stud might not be OEM and might have been torqued down to the part of the stud with no threads. I need a new stud and an OEM nut.

Here is what I pulled of:

And this is the nut that came off the front driver side stud:

I was having trouble finding the part number in the explosion chart.

2000 Lexus LX470.

Thanks everyone.

 

[2001LC]

partsouq 00XL manifold


Nut w/washer

Google Search

www.google.com

 

[LXMarksTheSpot]

Thank you! I got a new stud and washer coming!

 

[LXMarksTheSpot]

I see the stud is probably a class 4T in the service manual. Any idea which torque specification I should use?

 

[2001LC]

I typically torque studs to ~60 to 70% of its nuts torque spec. Nut is 13ft-lbf, so ~9ft-lbf.

 

[LXMarksTheSpot]

How do I torque down the stud? I put two bolts and back them down on each other but the bolts kept spinning and I didn’t want to ruin something.

I measured the studs with a micromoter. The comparison stud is 27.86 from top to surface. And the new stud is 27.71 from top to surface. The two front are within a .10 of the other two.

 

[LXMarksTheSpot]

Update on this. I tried to torque the stud down with two nuts. Backed the bottom nut into the top nut. Didn’t really work great. I had bout lock tite on the stud so I gave it 24 hours to cure. When I put the manifold back on I had no problem torquing the nut/washer combo to 13 ft pounds. I’ve been checking periodically and everything looks good.

So I guess the answer is just get the stud in to the same dept as the other. Let the blue loc-tite cure, then torque the bolt to spec. Worked me for.