Loyale exhaust studs

[jpdukes]

1992 Loyale. I'm dealing with the classic problem of stripped threads for the exhaust y pipe to the engine. Having looked through the forum, the agreed upon solution seems to be tap new threads at 7/16. I just want to confirm that this is the best solution.

 

So: new threads at 7/16 inches

 

The heads are aluminum?

 

No need for one of those expensive coiling threading systems?

 

Thanks for your thoughts...

 

jpd

[jpdukes]

Oh, another question: Don't ask me how but I seem to have lost the studs for the two unstripped bolt holes for the other y pipe flange.

 

These are 10mm studs, yes? Anybody know what kind of threads?

 

-JPD

[idosubaru]

10x1.25 threads

 

any auto parts store will have those, although they will NEVER have them listed for a subaru. you just have to look and grab. if you find the ones (very common) that have an unthreaded portion in the midsection of the stud, then you want the short side (side with the least number of threads) to go into the engine block. they work great that way, then the unthreaded portion just ends up where the exhaust manifold is. if you don't do it that way your exhaust nut will run into the unthreaded portion.

 

no point in asking "is 7/16" the best way" - that has been a topic of contention in the past and ends up in arguments (you've probably seen them). read through the info here and make the decision yourself.

 

the 7/16" thread and repairing the threads both work, your choice!

[beataru]

Yeah, the unthreaded studs are called shoulderd studs, there much much stronger. let us know when you get her fixed.

[Andy FitzGibbon]

OEM Subaru studs are continuous thread, for what that's worth.

Heli-coils are not that expensive, I think the last time I bought one it was around $15. I haven't ever tried doing the 7/16" trick.

Andy

[jpdukes]

Thanks for all the responses. I neglected to mention that I pulled one of those coils out of the hole when I was cleaning it up a few days ago. I figure that if it was tried once, and is failing to hold again, that the threads must be beyond even that solution. Maybe I'm wrong about that, but I'm going to try retapping.

 

However, instead of trying 7/16 studs and tap, I bought a 12mm tap--just slightly larger than the 7/16. The value of it is that I can use the exact same thread guage as the original, 1.25, which might help the tap work true. I'll let you all know how it goes.

 

Just to note: I'm fixing this problem and then hoping to sell the wagon. I love it, but I'm a busy freelance reporter who needs a reliable car, and doesn't have enough time or money to keep it running. I'd like to own another one some day when I have more time. It would be a perfect canoeing and surfing attack vehicle.

[Andy FitzGibbon]

Just to note: I'm fixing this problem and then hoping to sell the wagon. I love it, but I'm a busy freelance reporter who needs a reliable car, and doesn't have enough time or money to keep it running. I'd like to own another one some day when I have more time. It would be a perfect canoeing and surfing attack vehicle.

 

Sent you a PM- I might be interested in the wagon.

Thanks,

Andy