Well it finally happened last night. Pulled up to a stop, hear the inevitable hisssss, get out and see coolant coming out underneath. Pop the hood, and it's spraying out of the hose at the waterpump housing. So I gues it's finally time to ditch the closed loop system and do the conversion. To date I have had NO problems with it, and with the addition of the 3 core it has cooled quite well.
So I guess now I'm out to peice together the ultimate cooling system for the XJ. I have way to much $$ in my motor to do otherwise. So I am looking for a bit of help (and advice) with what to do.
I know my 3 current 3 core will not work. I just purchased a 3 core for the '96, so I may just take that one and use it. So radiator is done.
I have been really looking at the Hesco waterpumps. I quote from thier website;
Provides 10 to 20% more cooling efficiency than the stock water pump. We have replaced the stock stamped steel 5-vane impeller with an 8-vane billet aluminum impeller to achieve this goal. The impeller is larger than the stock and lessens the cavitations of the coolant to create a more positive flow in the space between the impeller and the #1 cylinder. The dyno showed an additional bonus of 6 hp. and 2ft/lbs. of torque gain we weren't expecting. The horsepower gain comes from the impeller slicing through the coolant instead of paddling the coolant. Individual gains may very depending on what accessories are already in place and engine condition. Either way it is a worthy addition to any Jeep engine whether it's a street driver or an off-road rock crawler.
I figured if I was going to do it, do it right. It's not like I havn't blown useless money on my motor before. So question #1 is this; Hesco list's 2 different ones (part numbers), does anyone know what the difference is?
My next question has to do with the t-stat housing. I've done a lot of reading and it seems like nobody has offically came out and stated that I would need a new t-stat housing. Once again I was looking at the one from Hesco (high-flow).
The question is can i use the one from Hesco, or do I need an alternative?
So now, radiator, water pump, and t-stat housing has been addressed. I know that I will need an different heater control valve. What about the overflow bottel? Rumor has it, that they are no longer available from DC. I'm sure I can find an alternative, but my question is this; will a new style overflow bottel fit in the location as it is in the older (93+) XJ's on my '89. I know not a major concern for some, but with me moving so much stuff around with the supercharger project that location would be perfect for me.
And lastly, does anyone know a way, or figured out a way to use the HO temp switch to operate the closed system fan automatically?
So to recap with the questions;
1) What Hesco waterpump would I need. Or I guess the real question is; does anyone know the difference between the 2 they have listed on thier website? 2) T-Stat housing. Will the Hesco one work with my application. And is thier a difference on what one I will now need converting to an open type setup? 3) Overflow bottle. Will one from a later model XJ fit in the same location on my '89? 4) Has anyone figured a way to use the HO temp switch to operate the closed system fan automatically?
EDIT: 1 more question. I am going to assume my stock hoses will work with the new style radiator as well?
Just got done talking with Bennie @ Hesco. Apparantly thier is only 1 waterpump for my application. It would be nice if they updated thier website with good info... . And aditionally, from what he told me, the t-stat housings will work fine with what I am doing.
So #1 and #2 questions are answered. Anyone else have any input on the rest?
you do not need the hesco t-stat housing, clean yours its fine! secondly do not use the switch that is factory for fan, get an adjustable one so you can alter on times, or better yet go ALL electric like i did and use three 9" fans or 2 10" fans, both work really well. plus you can get a sealed unit that is adjustable to trp them or also switch on from inside. overflow i got nothing on, not much exp with older cooling systems upgrades. also if you are really that worried about it do not use a t-stat at all, i know guys who use a "washer" and they have diff ones with diff sized holes in them, they heat up faster and stay more regulated by always allowing the same amount of coolant through. this works really well with electrics by the way
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MY happy place is dark, so YOU cant see the scary things!
I actually have to replace the t-stat housing, due to the difference in them between the HO and non-HO motors. I have a '95 head on my '89 block, but I used the old t-stat housing due to the older cooling system I was using. The bolt pattern is exactly the same, it's just a bit different. I just went ahead and got the Hesco one, as it increases flow by 30%; and was only like $30.
I plan on running the Spal fan I have laying around and ditching the fan clutch. That will be wired to come on at all times. I will probally still use the thermo for the aux. fan due to needing to fill that hole anyways on the t-stat housing.
As far as fan control goes, if I was going to do anything I'd get the Spal fan controler. At the moment I don't want to blow another $150 on that, maybe someday....
Put the newer HO tstat housing in (your new radiator wont have the bung the old renix one does) and you'll have to adapt the sensor wires to the newer sensor, if you plan on running the e-fan off the sensor.
As for overflow bottles, use a washer fluid bottle in the location the stock pressurized bottle is, you'll have to tap into it & run your own lines, but it'll work & not look too bad, plus you can get them for dirt cheap. the HO overflow bottle sits/mounts right where a Renix coil sits, so you can't use one of them anyways.
I think the 2 water pumps listed for 4.0L engines is because on grand Cherokee 4.0Ls the water pump turns the other direction.
lazarus wrote: you do not need the hesco t-stat housing, clean yours its fine! secondly do not use the switch that is factory for fan, get an adjustable one so you can alter on times, or better yet go ALL electric like i did and use three 9" fans or 2 10" fans, both work really well. plus you can get a sealed unit that is adjustable to trp them or also switch on from inside. overflow i got nothing on, not much exp with older cooling systems upgrades.
Got pics of it? btw nice grille guard; where'd ya get it?
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My Fleet 1996 XJ "Snowball"- 3.5" lift, bunch of little mods. I hate pegleg rear axles! 1974 AMC Javelin "Jade Grenade"- 360v8, 4sp, green inside and out. Underfunded Project. 2009 Kawsaki Vulan 900 "Rocket III"- Summer DD
dogwonk wrote: aci4369 wrote: Those hoses are pritty!!! Don't encourage him!!! He's been prancing around the house talking about how pretty they are already. You've just fueled his fire!!!
Work has been kicking my butt latley and I havn't had time to work on the XJ (not to metion the cold weather). I plan in tearing into it this weekend and getting everything swapped over. I do plan on keeping it documented for others in the future, so check back for updates.
I know some of this is pretty basic, but I decided to document it as much as I could.
First we are going to do the radiator removal. You will need to remove you front header panel to get to the radiator. To do this first you will need to remove a few pieces from your grill.
You first need to remove the 4 screws that hold the headlight bezel on.
You than need to remove the bezel, and the side marker. Once you have those removed you will need to remove the side marker bezel as well to gain access to the 2 bolts that hold the header panel on. You will need to remove 1 screw, and 2 bolts from the side marker bezel.
You than will be able to remove the 2 nuts that hold on the header panel.
Next you will need to remove several bolts and nuts from the radiator support so you can remove the header panel. Their are 3 large bolts on each side, as well as 2 nuts in the center.
Their are also 4 nuts hidden on the back side of the header panel at the top. These need to be removed as well.
And lastly, their is a single bolt hidden on the bottom side that holds the bottom in. This can be accessed from underneath.
Once you have all the nuts and bolts removed, you can pull the header panel out and than remove the radiator support. You do not need to remove the aux. fan (however disconnect it) as it will pull out with the support.
You now have access to the radiator. To remove it you will need to undo the upper and lower radiator hose, as well as both transmission lines. You will also need to remove the rubber isolator on the top of the old radiator so you can use it on the new one. Their are than 1 nut on each side that holds the radiator to the ac condenser. Once you remove these you can pull the radiator out.
Here is a comparison of my old CSF for the closed loop system beside the new CSF for the open loop system. Notice the only real difference is the filler neck. Also notice that the thermo switch is on the radiator on the old one, and their is no spot for it on the new one (we'll talk about that later).
I also at this time decided I was going to change the t-stat housing to a new Hesco high flow housing as well as change the t-stat. To remove the t-stat housing you need to disconnect all the hoses (3) going to it, as well as remove the 2 bolts that hold it on.
Once you have it removed, you need to scrape off the old gasket and remove any RTV that was their prior. A razor blade works well. When installing the new t-stat and gasket, I used a bit of RTV to make sure I got a good seal. I than installed the new Hesco high-flow t-stat housing. Notice that the new Hesco unit has hole at the top. This is due to the fact that the newer open loop system's from the factory have a thermo switch for the aux. fan. I have yet to decide what I am going to do with the aux. fan (put it on a switch, or use a thermo switch in the t-stat housing), so I placed a plug in it for the time being that can easily be removed it need be.
I next changed the water pump witch I will document at a later time. Now is a good time since you have the radiator out to do this job since you have room. [B]I will update this post with a detailed write-up on how to change the water pump at a later time.
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Next I reinstalled the new CSF 3-Core radiator for the open loop setup.
And than installed the new lower BRX radiator hose. This was honestly probably the hardest part thus far of the install. The BRX hoses are much thicker and thus less playable. I ended up getting out some hose lube and it than slipped right on.
I ran out of day light, so I will update the rest of the install at a later time with pics.