EGR Hex Bolts

[Turbobum]

Can anyone make sense of this (photos)?

Courtasy of shotimes.com...

"On the manifold, find the port where the EGR valve connects. Nearby is a large hex bolt lieing flush with the manifold surface. This bolt is just an end-cap for the machining work which drilled out the EGR tube in the manifold - remove it (this bolt faces the firewall with the manifold in the car). Following the tube along for 8 or 10 inches, you will see the tube meets a cross-tube, drilled as a separate machining step. One end of this cross-tube is blanked by another, similar hex bolt - remove this (this bolt faces downwards with the manifold in the car). The other end of this tube narrows down, and lets out as two small jets inside the air intake, just inside the throttle body mouth. It is here that the flow will be obstructed by coke deposits. "

I've got my intake completely apart (for cleaning) and can't find the two hex bolts listed.

 

[Rubix]

As your quote there says, the EGR passage is where the EGR bolts onto the plenum, it's on the underside.

One where my thumb is in the top left


Follow that raised tube across the plenum to behind where the throttle body attaches... it can barely be seen here, it's behind those coolant hoses. If the intake was horizontal, it is facing downward. It is the ******* of the intake, hanging downward, right next to the taint of the plenum.

 

[Turbobum]

Great pics, thanks. I don't have those bolts on my intake, and I think I know why...is it true MTX SHOs (mine's a '91) don't have EGRs?

 

[SHObill]

It is the ******* of the intake, hanging downward, right next to the taint of the plenum.

HaHaHa! good description!

 

[LJRuddy]

Great pics, thanks. I don't have those bolts on my intake, and I think I know why...is it true MTX SHOs (mine's a '91) don't have EGRs?

All MTX SHOs were non-egr UNLESS they were sent to California to be sold.

89-95 MTX Non-cali SHOs did not have EGR
89-95 MTX cali cars and 93-95 ATX SHOs had EGR.

 

[mattsho1993]

ok i took the throttle body off, now what gets clogged exactly i see the hex nuts or w.e. i also see inside the plenum on each side of the crotch two holes are those jets? idk what exactly has to be cleaned....

 

[mattsho1993]

i got the rear plug "hex bolt" out is this the tube?

 

[mattsho1993]

will it hurt to clean out tube on the car? (not taking intake off?)

 

[riden2low]

will it hurt to clean out tube on the car? (not taking intake off?)

I wouldn't as I had to run degreaser inside of mine and with all of the stuff coming out and into the intake, no I would give it a good cleaning with the intake off. Unless you can keep the stuff from coming out of the openings that runs into the intake. And it depends how bad yours is, as for mine, it was totally plugged up.

 

[Wade]

I had to take mine off more then once because I did not get it cleaned properly the first time, I do not think I could of possibly cleaned it out properly without removing and dismantling the intake. When you look down the throttle opening, those 4 nostril opening can be completely closed due to all the deposits. It takes some time and patience to really get it all out. Lots of spray cleaner, a few different sized brushes, coat hanger, and an air compressor did the job well.