Bolt and spring for spherical joint exhaust (1 Viewer)

[petegangies]

Does anybody have a part number for the bolt and spring kit to suit the front spherical joint mufflee on an fzj80?

Thanks
Pete

 

[CharlieS]

I'm pretty sure mine are studs and nuts with gaskets, not spherical joints.


Here a pic I grabbed off the web that shows tha
t area:

 

[petegangies]

I'm pretty sure mine are studs and nuts with gaskets, not spherical joints.


Here a pic I grabbed off the web that shows thartarea:
View attachment 3824912

I'll take some pictures of mine in the morning and post them here
.

 

[CharlieS]

Might be different where you live. Partssouq has some good model and country specific diagrams that might help you find what you're looking for.

 

[Rifleman]

Here in the states the exhaust manifold to head pipe on a 1994 fzj80 uses studs, nuts, and round donut gaskets, I know this for a fact because i just replaced 4 of those studs on my truck, along with both head pipe gaskets, Part number for the studs here in the states is 90080-12007, and head pipe to exhaust manifold gaskets are 90080-43036
One other difference i noticed in your photo of your head pipes and muffler, the faces of the head pipe flanges on your setup doesn't have a counter bore to locate the flat gaskets like what we use in he states, You can also see that counter bore in the face of the right manifold in the photo below

 

[mudgudgeon]

Does anybody have a part number for the bolt and spring kit to suit the front spherical joint mufflee on an fzj80?

Thanks
PeteView attachment 3824897
View attachment 3824898

Definitely no springs on my Aussie market '93

Do you have aftermarket pipes?

 

[petegangies]

Definitely no springs on my Aussie market '93

Do you have aftermarket pipes?

Factory headers, but the front Muffler is aftermarket..but was supposed to be a standard replacement item.

"Standard Replacement - Toyota Landcruiser FZJ80 4500 Front Muffler × 1"

 

[petegangies]

Here is a video of my exhaust setup:


and a picture of joints:

No flex joints or anything either. Big gaps have formed and leaking. This was installed in Feb 2020.

Looks like the factory headers have studs..so don't see how spring and bolt setup is supposed to work. Might have to pull these off and see if there's a gasket in there...

 

[petegangies]

All good. They use a ring gasket. Here's the part number.

 

[petegangies]

should I replace those exhaust nuts with stainless ones? does anyone know the size/thread I need?
I beleive the factory nut part number is: 90179-10070

Thanks, Pete

 

[Rifleman]

does anyone know the size/thread I need

Here in the states the thread size on the stud nuts is 10mm by 1,25, You can use plane steel nuts, but I'd put some copper anti seize on the stud threads before you install the nuts if you want to be able to easily remove them in a few years, Per the factory service manual the torque to fasten those nuts is 46 foot pounds,

 

[petegangies]

Here in the states the thread size on the stud nuts is 10mm by 1,25, You can use plane steel nuts, but I'd put some copper anti seize on the stud threads before you install the nuts if you want to be able to easily remove them in a few years, Per the factory service manual the torque to fasten those nuts is 46 foot pounds,

thank you! I believe the genuine ones are designed so they dont back out or loosen with vibration. I think the correct part number is 90179-10070.

 

[Rifleman]

thank you! I believe the genuine ones are designed so they dont back out or loosen with vibration. I think the correct part number is 90179-10070.

Per Mega Zip the part number you listed is the correct part number for the nuts you need,

 

[alia176]

I can see the flange ears are bending which might be exasperating the situation. See if the donut gaskets are toast and i know some have doubled up on them in order minimize the leakage.

 

[petegangies]

I can see the flange ears are bending which might be exasperating the situation. See if the donut gaskets are toast and i know some have doubled up on them in order minimize the leakage.

well that's pretty s*** considering it's only 4 years old and has probably done 10,000kms if that. I guess I'll need to replace the flanges if I want a proper seal then?

 

[alia176]

well that's pretty s*** considering it's only 4 years old and has probably done 10,000kms if that. I guess I'll need to replace the flanges if I want a proper seal then?

Nah, that's normal! People crank down on the hardware trying to stop the leaks and this happens. Just take it apart and see what's up before making assumptions

 

[petegangies]

Nah, that's normal! People crank down on the hardware trying to stop the leaks and this happens. Just take it apart and see what's up before making assumptions

I've got it booked into an exhaust shop for them to take a look on Saturday morning. Do most places have the right ring gaskets, or should I grab some from Toyota and take them with me? A whole new pipe with gaskets is $280 delivered. I'm going to ask him to give me an idea on price straight up, as I don't want to spend a fortune when I can buy a whole new pipe and try to replace it myself. Even though those rusty nuts look like they're going to be an absolute PITA to remove... will soak with 50/50 acetone + ATF for a couple of nights.

 

[alia176]

If you look at one of your picture closely, you will notice the gap between the two flanges are not equal. They are pretty thin towards the edges of the flange, but get a little bit more substantial towards the center.

In any case, I say purchase two OEM donut rings just to have on hand before you go to the shop.

 

[petegangies]

yep, I can see the left hand side pipe has a gap in the centre, suggesting it was overtightened, I reckon they used an impact gun to install, as it was dad's friend and he's always overzealous with his Makita gear. Hopefully with new gaskets and some high temp exhaust sealant goop, it'll be enough to create a seal again. Otherwise the exhaust place may need to remove the pipe and either try to bend them straight under heat and use a dye to confirm they're flush again, or chop and weld new flanges. I will try to save them some time by loosening those rusty exhaust nuts myself.. if there wasn't the issues of the bent flanges, I'd have just done the entire job myself, but not if more needs doing to make sure they're flush and sealed properly. I'll be working on the ground and not with a hoist. Though I do have access to a blow torch and bench vice..

If you look at one of your picture closely, you will notice the gap between the two flanges are not equal. They are pretty thin towards the edges of the flange, but get a little bit more substantial towards the center.

In any case, I say purchase two OEM donut rings just to have on hand before you go to the shop.

 

[CharlieS]

This is a place where Toyota gaskets matter. My custom exhaust guy insists on Toyota gaskets. He says the aftermarket don't last. I've found that to be true.