: Does the w4m heat exchanger replace the stock one?

04-01-10, 09:45 PM
Or does it need to be installed in conjunction with the stock one?

04-01-10, 09:54 PM
Or does it need to be installed in conjunction with the stock one?


04-01-10, 09:55 PM
Any install tips?

04-01-10, 10:02 PM
Was I supposed to get extra hose?

04-01-10, 10:03 PM
I would search this forum I remember seeing some discussions on it. Give Jessie a call.

04-10-10, 12:34 PM
I too had many questions as others had when ordering the w4me heat exchanger , As jesse noted it does not come with any hardware or hoses or instructions. My first reactions when I received the exchanger and opened the box was I was impressed of the quality of the welds and the very solid construction of the unit , even the nipples have barbed fittings so hoses do not slip off. As I proceeded to do the install I was watching the youtube vid of Jesse's install on another members car and followed it but was very hesitant of the positioning of the unit as it remains pushed off to the drivers side about 4 inches. I drove the car a few days but it not being centered drove me nuts. So for those who will want to recenter it here is what you will need.

2x "U" 3/4 " heater hoses
1 3/4" straight connector (shorter the better)
1 Napa Part ##### heater hose <-- will provide part number as soon as I verify

All work is performed from underneath the vehicle and a lift is required.
The bottom splash shield is held on by approx 8-10 plastic clips and 2 10mm Bolts.

Once removed there are two clips on the bottom of the bumper connected to air baffles/shields which should be removed in order to allow the bumper to be pulled down slightly.

Remove the lower hose from the pump to the exchanger outlet and discard.
I used a razor blade and cut the upper hose as is it was very tight between the two coolers and this was alot easier then prying it off.

Now slide the cooler over to your right and be sure to reposition the air baffle on the left that had gotten pushed over due to the heat exchanger being pushed against it.

next remove the clip on the right side air baffle (PITA) and fold it up and to the side so that the inlet and outlet on the new heat exchanger are clearly visible.

The pics do a better job explaining how the two U hoses and the connector in the middle of them connect the outlet to the inlet and the bottom NAPA hose is nearly a perfect fit as it is molded in the shape to connect the pupm to the outlet although about an inch on each end of the hose needs to be trimmed.

The pics below display how the cooler originally sat and after it has been repositioned , The upper hoses are not pretty but there are no kinks and no contact with the cooler. The entire cooler surface is now taking advantage of the lower grill opening.
Be sure to bleed the system after , I ended up adding approx 3/4 of a gallon coolant and used a 50/50 premix of dex cool.

04-10-10, 12:40 PM
The lower pre molded napa hose installed

04-10-10, 12:43 PM

The heat exchanger in this picture should be moved over to the passenger side more. Nice write up though.

04-10-10, 12:45 PM
Yes that is how it previously sat before my re-install

04-10-10, 03:13 PM
Benny, I already have my car on the ramps with all hoses disconnected and see exactly what you are saying. I need to go and get a 3/4 connector. I got everything else. I was looking for an S shaped hose but having a tad bit of problem at the moment. I think I'll get the 3/4 connector like you did. Thanks for the write up and giving me the ambition to center mine!!!!


04-10-10, 03:31 PM
An S shaped hose would be ideal but I could only find 2 U's as I was in a bind with the car on the lift. Good luck with your search.

04-10-10, 09:25 PM
Thanks again for the write up and pics. I am off to the Advanced Auto Store to return several Dexcool gallons I bought and did not need. I lost very little coolant centering the heat exchanger.

I got one question for you.

Did you find it necessary to burp the OEM exchanger via the purge cap on top of it? I did not do it after the centering today. My Supercharger did drink about half a gallon of fluid when I refilled it. It seemed like more went in than came out. :hmm:

04-10-10, 10:03 PM
Hey no prob.
Yes I had the bleeder screw on the stock exchanger open with the car running and it slowly took the 3/4 gallon after 4-5 minutes slowly than once it came out streaming from the bleeder I shut it. I still question whether or not all the air is out as air travels to the highest point (Intercooler) . I am going out soon to recheck the level to see of any change.

04-11-10, 10:42 PM
Update on exchanger being properly filled:

After a few days of driving after the reinstall I popped the hood to check the fluid level(car was cooled down). Coolant was at the very bottom of the reservoir ,I then proceeded to add a few ounces to top it off and left the cap off , I then started the car and it immediately overflowed as it was obviously filled to capacity. At this point I am pretty confident that all air is out of the system and it is properly filled.

04-11-10, 10:59 PM
LOL, yes sir, been there, done that! :)

04-13-10, 06:21 PM
Part number for the the lower hose used was NAPA 11707

05-02-10, 10:00 AM
Part number for the the lower hose used was NAPA 11707

Are you running the 160 stst also? Did you notice any differance with the mod?

05-03-10, 02:58 PM
Running the 160 thermostat will just keep your underhood ambient temps lower, and keep the engine cooler allowing more timing and that will make more power.

05-03-10, 11:58 PM
I am running the 160 stat and it made no difference until Jesse's tune. Now the car runs under 200 most of the time and when it creeps up in temp it is quickly brought down. Both the 160 stat and the exchanger are what I call complementing mods which enhance whats there already and open the gateway to future mods and more boost without having to worry about cooling issues in the future.

07-15-10, 11:44 PM
nice write up V series!!

any updates?

07-16-10, 12:30 AM

The heat exchanger in this picture should be moved over to the passenger side more. Nice write up though.

No doubt...Jesse is a ghetto hack-wad! :abuse:

07-16-10, 08:11 AM
Jesse has been installing the heat exchanger centered for those that request it. Requires additional hoses as Benny pointed out.

I consider Jesse the authority on modding and tuning the V2.

07-22-10, 12:11 AM
just installed our w4m heat exchanger....... biggest pita was finding and routing the hose...... i couldnt do a "s" shaped hose but did make a "U" sorta shaped hose- took some pics and will upload and post tomorrow.

the bottom napa hose # 11707 = gates 19707

Also I cant see any way the heat exchanger could ever "fall out" ......... my wife was even " NO WAY!"

07-22-10, 06:43 AM
Been there done that!
I agree, don't see how it could fall out.
Did you do the last step to remove any air pockets by bleeding the stock cooler?

07-22-10, 02:22 PM
gates part #

gates hose/ cut down and mounted

pic of the funky "u" ish shaped hose
from underside

07-22-10, 04:48 PM
all centered up


07-22-10, 06:24 PM
Nice job!

07-22-10, 06:48 PM
i will try to come up with some part numbers and diagrams to make the "u" hose

07-24-10, 08:02 PM
a rough idea of how i did mine- just missing the 90 elbow connector on the left lower side--- will start a new thread with part #'s and hopefully video