EGR Spacer Coolant Line

Calypso Pony · Jan 2, 2004

My bro recently purchased a 93 notch and is on his way to the modifications. He purchased a GT-40 Intake to bolt on to the engine and found the coolant line going to the EGR spacer was caped off. What is the purpose of deleting this on a 5.0 engine? We found where the line goes to the front of the EGR spacer, but the other line coming out the back of the spacer goes to what? where? Are there any advantages to keeping the deleted coolant line to the EGR spacer or would he benifit from reconnecting the lines where they are supposed to go? Thanks Peeps

Mustang5L5 · Jan 2, 2004

The rear line goes to a port on the lower intake manifold.

The reasons for and against capping these lines off have been and will be debated for years.

I prefer to leave the lines in place, but other think it's better to cap them

Calypso Pony · Jan 2, 2004

What are the reasons though? Thanks

Mustang5L5 · Jan 2, 2004

Some say it helps cool off the hot EGR gases and others say its to help prevent icing which can damage a motor.

Calypso Pony · Jan 2, 2004

Is ther any where I can get a diagram on how the lines run? I know the line coming from the front is coming off that coolant line near the fuel lines and it's also capped off. You said the other one is going to the intake. Are the line's much different from the stock intake to the GT-40 set up? The intake the car had before this one was the Cobra intake and as far as we know they have been capped ever since the stock to Cobra intake swap.

jrichker · Jan 2, 2004

The stock Mustang manifold had one coolant line running from the steel tubing that connects to the heater core inlet. The other coolant line came from a fitting on the RH rear of the lower manifold. It tapped into the water passage in the lower intake manifold.

The Explorer manifold whick is very similar to the GT 40 (same lower manifold) has both coolant lines coming off of the steel heater tubes. One coolant line comes from the top tube and the other from the bottom tube.

If you area has emissions inspections, you will need a functional EGR to pass. That means you will need the EGR coolant lines to work.

Calypso Pony · Jan 2, 2004

The Explorer manifold whick is very similar to the GT 40 (same lower manifold) has both coolant lines coming off of the steel heater tubes. One coolant line comes from the top tube and the other from the bottom tube.

Is the second line conected to the same tube the first line comes from?

Mustang5L5 · Jan 2, 2004

Ok, bottom intake is the GT-40/Cobra/Explorer lower intake.

Look at the left side. That is the rear of the intake. Pay attention to the two corners of the rear of the intake. The rearwardmost holes are for the bolts that hold the intake down. The next to holes are threaded. THESE are the two ports where the coolant line returns into the manifold. Usually there is a threaded nipple in one and the other is just blocked off. Reason where there are two is because on the Cobra, the throttle body is on the passenger side while on the SVT Lightning (1st gen) with the GT-40 intake the throttle body is located on the drivers side.

The same holds true for the stock intake. 5.0 HO's have it on passenger side while 5.0 Standard output (passenger cars) have it on drivers side.

Take a look and see what are in those two ports on your intake

Calypso Pony · Jan 2, 2004

Both ports on the intake are blocked off with plugs. What's my next step?

Calypso Pony · Jan 2, 2004

Anymore takers on this?

90mustangGT · Jan 2, 2004

The EGR coolant lines may cool the hot EGR gasses but it does heat up your TB and intake. Some say that you will loose power because of the hot EGR gasses heating up the intake charge but for the life of me I would like someone to explain how EGR temps will effect power when everyone knows that the EGR closes at WOT or low vaccume.

Calypso Pony · Jan 2, 2004

I just want to know how I can reconnect all the lines back to normal. I also wanted to know what the ups and downs are to having the line capped off and why someone would do this in the first place. Advantages to dis-advantages. Thanks to jrichker and Mustang5L5 for the previous info. Keep the knowledge flowing peeps.

Mustang5L5 · Jan 2, 2004

90mustangGT said:
I would like someone to explain how EGR temps will effect power when everyone knows that the EGR closes at WOT or low vaccume.

Do you drive around at WOT all the time? No, you drive at part throttle in which case the EGR IS OPEN. So you drive around and the EGR is opening because who drives at WOT all the time. So after a few mins of it, your upper intake is heatsoaked from the EGR opened. You see some punk kid in a civic and you go WOT to teach him a lesson. Yes the EGR closes at this point, but the last half hour you were driving around, it was working and generating heat in your intake

Mustang5L5 · Jan 2, 2004

Calypso Pony said:
Both ports on the intake are blocked off with plugs. What's my next step?

Do you have access to a junkyard?

What you need to do is remove the passenger side plug.

No on ANY junkyard car with a 5.0L in it, look for the plug with a nipple in it's place. On cars with the throttle body on the driver's side, it will be on the drivers side. On cars with it on the passenger side, it will be on the passenger side.

All you need is that threaded plug with a tube nipple on it. I beleive if you go to Pep Boys or Autozone they may have one on those little racks where the keep all the pipe and flare fittings and such. I forget the thread but i *think* it's 3/8th NPT. Not sure though. Take the threaded plug you remove with you

Calypso Pony · Jan 2, 2004

So I take it that the other line coming out of the back of the EGR spacer goes into the lower intake at this pluged area, but with a fitting on it? Any more takers on this? Thanks for all the info , but please keep it coming.

Mustang5L5 · Jan 2, 2004

Yup, just get a short peice of rubber hose like the front and run it from the rear of the EGR spacer down into the nipple that threads into the lower intake.

That's it really.

Calypso Pony · Jan 2, 2004

Thanks a bunch Mustang5L5.

Black331Stang · Jan 3, 2004

Mustang5L5 said:
Do you drive around at WOT all the time? No, you drive at part throttle in which case the EGR IS OPEN. So you drive around and the EGR is opening because who drives at WOT all the time. So after a few mins of it, your upper intake is heatsoaked from the EGR opened. You see some punk kid in a civic and you go WOT to teach him a lesson. Yes the EGR closes at this point, but the last half hour you were driving around, it was working and generating heat in your intake

so is this Pro blocking off EGR or Anti blocking it? or it doesnt matter?

Calypso Pony · Jan 3, 2004

90mustangGT said:
The EGR coolant lines may cool the hot EGR gasses but it does heat up your TB and intake. Some say that you will loose power because of the hot EGR gasses heating up the intake charge but for the life of me I would like someone to explain how EGR temps will effect power when everyone knows that the EGR closes at WOT or low vaccume.

I think he was trying to get answers to why EGR temp affects power.

Mustang5L5 · Jan 3, 2004

Black331Stang said:
so is this Pro blocking off EGR or Anti blocking it? or it doesnt matter?

It depends really. you NEED it for emmissions so if you need to pass the sniffer then you can't remove it...at least permanently.

If it doesn't matter, block it off at the heads and it will keep your intake cooler. When you do this then you don't need the coolant lines anymore.

There are downsides to removing it though. SOme claim you lose a little part throttle drivability without it.

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