With reference to the EGR pipe going from the top of the right exhaust header(before cat.) to the back of the intake manifold: has anyone here either replaced it, seen it done, or talked to someone who did???????

I do have a leak in mine[ in the expansion bellows, that is in the horizontal portion behind the engine]. Have known for a while--but was 'hoping' it would go away.
It is obvious when the engine is cold but seems to go away when it warms up. This is contrary to manual that says the EGR valve is closed below 157 degrees and open above 157 SINCE it also says it is CLOSED at idle. Why would the noise reduce if the valve is still closed at idle after it warms up !!? Anyway, that is not the issue.

I would like to replace the pipe myself[I have a Autolifter and can raise the car about 7' off the floor--so I have access] . Do you have to drop the transmission or pull the engine--heaven forbid !!!!?

Need to know if you can rotate the pipe to get it out[it looks very tight w/ the bends at the top]; also, does it come out the top or bottom; do you have to remove the right cat. if it comes out the bottom. Does the intake need to come off

TKS for any help--just curious what may be involved in this--or do I just have to ignore it!!!! Does anyone know FOR SURE??

 

lol..

I had the same problem with my EGR. I'm sorry to say yes you have to drop the tranny.
My mechanic did mine for me, I didn't have my car for 3 days.

 

changed mine as well... i did it when i changed my starter

 

Coupe--did you also have to drop the transmission?????

Anyone do it without dropping the tranny??

 

No he didn't drop his tranny. He had his starter replaced, at the same time he did his EGR since it was clearly visible from the top with every thing off. Just in case you don't know the starter sits on top the engine in the back by the firewall underneath the air intake. That's the only other way to get to the EGR, both time comsuming.

 

Then I understand that there are 2 ways to change it: 1) drop the tranny 2) pull the intake

Think I would rather pull the intake if these are only options.

Yes, I do have the 2 shop manuals--wouldn't touch anything without them !!!!!

TKS

 

Just curious ....... does the pipe "break" due to corrosion (internal or external) or does it fail due to vibration fatigue?

And .... is it one of those inevitable repair items?

 

Just about every LS has this problem. The pipe works under very high temps. It is also exposed to constant vibrations from the engine. My mechanic looked at it and said that he could probably change it with out dropping the tranny, IF the two bolts that hold the pipe to the exhaust don't break during removal. However, there is a very good chance that they will break, since they are also exposed to high temps and corrosion.
BTW, it is much easier to drop the tranny than to remove intake, and cheaper too.

This usually happends around 100K miles, so, 98LS, your pimpin' ride is good for another 60K, no problem.

 

My Lexus mechanics charged me 4 hours to replace the EGR pipe last year. I believe that he didn't remove the intake.
tvd51

 

Am I allowed to do this??

Same question and a simple answer I just saw on Lexus owners club.

 

joyous pm me i can give you some help

 

For a 94 LS this is part #25601-50010
EGR Pipe Assy.

Sooner must be a very able mechanic. In an old post he said that he can usually install this part in 30 minutes or so. Obviously without dropping the tranny or removing the intake. I think the key is to remove the catalytic converter on the right side of the engine where these parts are located. Rice has some very valid points about the condition of the bolts surrounding this area. due to extreme heat.

Wish I were closer to Washington!!

I need to replace my cracked EGR Pipe and also need new motor mounts. My guess is that I should take care of the mounts before ( or during ) the Pipe replacement or it is likely to break again.

94 LS 151,181
Hey Rice, I'm not near done yet! I want to keep going!

 

on a 94 u dont need to remove the cat

 

Would it help if I tell you that in my College Years I resided at 1320 Chataqua in Norman?

PM me or post , but I would love to get input on how to do this.

Thanks, damon

 

How did you discover the EGR pipe was broken?