Exhaust Manifold Removal

[Slowtoy]

I have to take off my exhast manifold because i fear there is a hole in it the size of texas, and its leaking exhast into the truck. I need some help getting it out, i took off the air cleaner and i am looking at the top of the air rail and carb. I kinda want to do a desmog at the same time... any suggestions would help!

 

[worldspan]

take your time

Search "My desmog thread" for help on emissions removal and study the multiple diagrams carefully....they'll get easier the more you look at them and your engine bay at the same time.

Manifold removal - Get Felpro gaskets and remove bolts...be sure to spray them down with PB Blaster first and let sit...you dont want them to break on ya. There are a lot of useful tools here on this site so do some searching and you'll find what not to do and what problems might arise. Get the FS manual or at worst the Haynes manual.

When i did my I/E removal 1 month ago the best thing i did was desmog my engine at the same time. I had everything off and it was easier to do and my 84 fj60 runs better now.

Good luck and take your time labeling your vacuum hoses and how you take off your carb. It might be a while before you put everything back together so take pictures and label, label, label.

 

[2mbb]

You should probably do a search. But before you to to the trouble of removing the exhaust manifold you should check for leaks elsewhere, specifically where the EGR pipe meets the exhaust manifold. There is a gasket there that often fails.

What makes you think the manifold is leaking and not the exhaust pipe or catalytic converter or muffler? I had another car with a bad in-cab exhaust problem and it was a hole on top of one of the mufflers (there was a access hatch in the floor right above the muffler, so...

I know on my FJ60 if I drive around with my rear liftgate open the exhaust gets sucked in really bad. I have to open a front window and have the blower on high to make it home from Home Depot with a sheet of plywood in the back.

I remove the carb but not the air rail to remove the exhaust manifold. It comes off as one piece with the intake manifold. It's easier if you loosen or remove the vacuum piping manifold. Do a search and you'll find more detailed information.

 

[Slowtoy]

I know what you mean, its like a wasps nest in there! I unfortunately have the haynes manual so i have been searching for somehting beter, the sad part is, my rig is my main source of transportation, i have a 89 fj62 that im running back in forth to work is undercover of dark bec. i have no inspection sticker and i have to get the brakes replaced. Where can i get a good diagram of my carb so ill be able to lable the hoses?

 

[Slowtoy]

I work at a dodge dealership, so i got my truck up on the lift and i felt all up and down from the upstream of the cat all the way down to the end of the tail pipe and nothing was wronge, another thing was, i only got exhaust in the cab when i had my windows down, when they were up i dodnt have much of a problem, unless my a/c vent was on open and not rec.

 

[Slowtoy]

any thoughts about running a rich/lean fuel gauge?

 

[cando john]

rich/lean "fuel" gauge ????? vacume gauge ....maybe

 

[FJ40Jim]

any thoughts about running a rich/lean fuel gauge?

An air/fuel gage is a handy tuning aid in the dash.
But... If there are any leaks in the exhaust system, the gage readings will be off because of the dilution of exhaust gas by atmosphere.

Find the exhaust leak first, then repair the leak, then do the A/F gage.