Another Manifold question...

[Blue60]

2/79 stock FJ40...manifolds off for blasting and painting...

(1) On the 90 degree elbows which slide on the center section of the exhaust manifold, there are two rings (similiar to pistion rings). Are there any wear tolerances for these?

(2) After the elbows have been cleaned and inserted back in, they are free to rotate with minimal force applied...is this normal and acceptable?

(3) The SOR catalog depicts the rings (#16 on SOR diagram, and call exhaust manifold ring), AND also depicts a circular spring (#15 on SOR diagram, labled exhaust manifold spring). Do I need to have these springs?

(4) I have the heat riser shaft and coil, but am missing the heat rise valve. Is there any place to get one?

This manifold elbow question has been bugging me for a week now, someone chime in with some good input and save my sanity! Even the Toyota mechanics couldn't give me an answer...



Cheers, and Keep on Cruising

Dave

 

[Poser]

2/79 stock FJ40...manifolds off for blasting and painting...

(1) On the 90 degree elbows which slide on the center section of the exhaust manifold, there are two rings (similiar to pistion rings). Are there any wear tolerances for these?

(2) After the elbows have been cleaned and inserted back in, they are free to rotate with minimal force applied...is this normal and acceptable?

(3) The SOR catalog depicts the rings (#16 on SOR diagram, and call exhaust manifold ring), AND also depicts a circular spring (#15 on SOR diagram, labled exhaust manifold spring). Do I need to have these springs?

(4) I have the heat riser shaft and coil, but am missing the heat rise valve. Is there any place to get one?

This manifold elbow question has been bugging me for a week now, someone chime in with some good input and save my sanity! Even the Toyota mechanics couldn't give me an answer...



Cheers, and Keep on Cruising

Dave

Thought this was coverd in a previous post...


#1- If you have noticed a massive amount of black exaust streaking from the joints, then you may need to replace the manifold sections, or use some high temp manifold sealer sold by Caterpillar to get them sealed up again. Typically, this is not the case. I have seperated many a multi-piece manifold section and not replaced the sealing rings, and not had any leaks.


#2- Sounds ' normal ' to me.


#3- The spring is under the sealing ring, if I am not mistaken. ' Need them? ' If you are replacing the sealing rings, you will need them.


#4-If SOR does not list it, odds on you will need to get one from someone willing to tear apart a manifold, but, considering the enviornment in which it lives, I can not imagine that a used one is going to be easy to get off, or even useable afterwards.


On your commentary about ' Toyota mechanics '....


Most dealership wrenches have no idea about anything older than 10 years, as it is not too often that people who own these older vehicles are going to be spending the money to have their vehicle serviced by Toyota. Look man, you probably know more about your truck than 80 percent of ALL the dealership mechanics in the USA...the thing is twenty-five years old...


Good luck!


-Steve

 

[Blue60]

Poser,

Yea, this was kinda covered earlier, but expected more "gurus" to offer some insight. Yours has been the most beneficial so far...appreciate it very much. I'll just slap it back together and see how it goes. There was no evidence of leaks before I cleaned it up, except by the EGR outlet gasket/flange fitting. Also no evidence of cracks anywhere, and it's been running in the cold Maine environment for quite awhile without the heat riser valve...

Thanks again

Blue60

 

[Poser]

If the gasket flange surface on the EGR tube is distorted even in the slightest, it will not EVER seal. SOR has a stainless option with a much thicker flange that will not distort...

Just FYI...


Good luck!


-Steve