EGR Revival question

[Grandavi]

I am rebuilding my engine and noticed that the gasket for my EGR system was blown out which had the exhaust gases basically cooking the hose at the back of the block (coolant elbow) and split the egr hose as well.
My mechanic says that i can delete it if I want although it will raise my EGT (which has been proven.. so not questioning it).

However.. this is kind of a difficult part to find so far. I think I have replacement gaskets (aftermarket) although I do not trust their quality and want to avoid a revisiting later on. I can't find the hose anywhere yet.

Does anyone have a vendor or recommendation on fixing my EGR system? It looks like I may be able to just get a generic shielded hose for the system...
I am thinking I would rather not block off the EGR system solely because a 100 deg diff in EGT is not really smart.

 

[Poodles]

If you're speaking of the EGR cooler gasket, get it from the dealer. It's not a cheap paper gasket like all the gasket sets (even fel-pro).

The pipe is simply a rubber hose with some heat resistant braiding around it. Can buy it from the dealer if you want, or just make your own.

 

[Grandavi]

Thanks Poodles : ) (sorry.. I like typing Poodles... there.. I did it again...)
There are no other EGR parts that are serviceable that I should change out while the blocks out of the car? From what I can see its only the hose and the gaskets that would be "wear" points.

 

[Poodles]

Besides cleaning out the carbon buildup in the components, not really. The TSRM shows how to check them IIRC, so if you have the time, just check their operation.

 

[Grandavi]

Now.. I have done a lot of research and was just checking DM to see if they had anything with the EGR system and saw this:

"3. 7M EGR Block Off Plate Set

This is Arizona Performance's EGR block off plates, these are very high quality and will allow you to remove your restrictive, power hogging EGR system. Now sold as a 2pc set, and the plate for the back of the intake plenum has a 1/8" npt hole so you could install an additional vacuum fitting if needed! The other plate goes on the back of the head, and removing the EGR cooler plate is required. The hole where the plate covers is on the back of the head on the exhaust side. If you leave the EGR cooler plate and just block the hole on the intake side of the head, it causes heat buildup in the head and the #6 cylinder, leading to blown head gaskets! This is the only version we offer because it will not cause engine problems. "

Out of all my research, I have not seen anything that states this is the case. 88 MK3 does not monitor the EGR so it can be deleted, but from my understanding, your asking for problems with detonation due to the EGR keeping the EGT's cooler. Mechanic says its okay to delete because its not monitored, however, he also agreed with the larger chance of detonation. But heat buildup in the head and #6 cylinder??
Is there truth to that?

 

[3p141592654]

"Power hogging", LMFAO.

 

[Poodles]

Only the cali. spec supras had an EGR temp sensor. It won't hog power as it's not open at WOT (well, unless there's something wrong with the system), and the issue is more that the ECU expects it to be there and is tuned accordingly.

 

[adampecush]

I've got a few OEM EGR gaskets kicking around. PM me if you want one.

I've also got an extra cooler plate if you need it.

 

[Dan_Gyoba]

"Power hogging", LMFAO.

This.

There is no reasonable explanation for heat buildup in the head from an EGR delete, except for the potential increase in EGT, which NO delete system can prevent. This is also only under part throttle where this can happen, since that's the only time that the TCCS should have the EGR system open at all.

Get the OEM gasket, check the operation of the valve, and put it back together. Particularly with your driveability goals, the EGR is a good thing for you all 'round.

 

[Grandavi]

yeah, going to stick with the EGR

 

[adampecush]

This.

There is no reasonable explanation for heat buildup in the head from an EGR delete, except for the potential increase in EGT, which NO delete system can prevent. This is also only under part throttle where this can happen, since that's the only time that the TCCS should have the EGR system open at all.

Get the OEM gasket, check the operation of the valve, and put it back together. Particularly with your driveability goals, the EGR is a good thing for you all 'round.

If you delete the EGR at the intake runners instead of removing the cooler and installing a block plate there, you are still blanketing the back of your head with hot exhaust (which there may or may not be cooling system provisions in the head for), hence the heat buildup comment. It is essentially the same as running with EGR functional.

 

[Grandavi]

the initial idea was to install block plates, but I think I would like to keep the EGR...

 

[adampecush]

if you're on the stock ecu, its a good idea. Cracked ringlands on #6 of my engine sure suggest I should have left it on...