Threaded studs on TJ oil pan screws
 

About half of the oil pan screws on my TJ are plain cap screws, and half
have a threaded stud projecting. None of the studs do anything that I can
see.

What are these studs for?

Re: Threaded studs on TJ oil pan screws
 

Alignment would be my guess. It is a pain to get a pan and gasket
started square so studs sound better than tying the gasket in place with
thread.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Richard J Kinch wrote:
>
> About half of the oil pan screws on my TJ are plain cap screws, and half
> have a threaded stud projecting. None of the studs do anything that I can
> see.
>
> What are these studs for?

Re: Threaded studs on TJ oil pan screws
 

Alignment would be my guess. It is a pain to get a pan and gasket
started square so studs sound better than tying the gasket in place with
thread.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Richard J Kinch wrote:
>
> About half of the oil pan screws on my TJ are plain cap screws, and half
> have a threaded stud projecting. None of the studs do anything that I can
> see.
>
> What are these studs for?

Re: Threaded studs on TJ oil pan screws
 

Alignment would be my guess. It is a pain to get a pan and gasket
started square so studs sound better than tying the gasket in place with
thread.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Richard J Kinch wrote:
>
> About half of the oil pan screws on my TJ are plain cap screws, and half
> have a threaded stud projecting. None of the studs do anything that I can
> see.
>
> What are these studs for?

Re: Threaded studs on TJ oil pan screws
 

Mike Romain writes:

> Alignment would be my guess.

This has nothing to do with gasket alignment. The studs are outside the
pan, on the screw heads.

Re: Threaded studs on TJ oil pan screws
 

Mike Romain writes:

> Alignment would be my guess.

This has nothing to do with gasket alignment. The studs are outside the
pan, on the screw heads.

Re: Threaded studs on TJ oil pan screws
 

Mike Romain writes:

> Alignment would be my guess.

This has nothing to do with gasket alignment. The studs are outside the
pan, on the screw heads.

Re: Threaded studs on TJ oil pan screws
 

Richard J Kinch wrote:
>
> Mike Romain writes:
>
> > Alignment would be my guess.
>
> This has nothing to do with gasket alignment. The studs are outside the
> pan, on the screw heads.

Then I would guess that the last person that took the engine apart lost
the pan bolts and just made do with what he found lying around on the
floor or bench.
This usually means those 'studs' have to go back into the 'same' holes
unless he got really lucky and the threads were the same. Most times I
see that, the threads have been chewed out to only fit the replacement
bolt. This is bad for oil leaks and future gasket replacements usually
too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: Threaded studs on TJ oil pan screws
 

Richard J Kinch wrote:
>
> Mike Romain writes:
>
> > Alignment would be my guess.
>
> This has nothing to do with gasket alignment. The studs are outside the
> pan, on the screw heads.

Then I would guess that the last person that took the engine apart lost
the pan bolts and just made do with what he found lying around on the
floor or bench.
This usually means those 'studs' have to go back into the 'same' holes
unless he got really lucky and the threads were the same. Most times I
see that, the threads have been chewed out to only fit the replacement
bolt. This is bad for oil leaks and future gasket replacements usually
too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: Threaded studs on TJ oil pan screws
 

Richard J Kinch wrote:
>
> Mike Romain writes:
>
> > Alignment would be my guess.
>
> This has nothing to do with gasket alignment. The studs are outside the
> pan, on the screw heads.

Then I would guess that the last person that took the engine apart lost
the pan bolts and just made do with what he found lying around on the
floor or bench.
This usually means those 'studs' have to go back into the 'same' holes
unless he got really lucky and the threads were the same. Most times I
see that, the threads have been chewed out to only fit the replacement
bolt. This is bad for oil leaks and future gasket replacements usually
too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)