Waterpump 4.0 - 2.9

[gerko]

Hello,

for a kitcar project I want to use a 4.0 V6.
But I would like to have a waterpump which turns to the right,
not to the left
(I cannot use the original multi band but would like to use a belt
like the older cars have with 2.8 engines)

In the book it says;
the waterpump of a 2.9 is the same from the outside
but warning; don't place it because it turns the other side
and can cause damage to the engine.

Can someone tell me which waterpump of the 2.9 this is?
Hopefully also the number to order this specific waterpump?

Thanks in advance!

 

[rickcdewitt]

its not that simple.the motors are plumbed different so you would be running the coolant in reverse.if it would even bolt up

the best bet is to modify the serpentine system to fit and get the right length belt

 

[Psychopete]

its not that simple.the motors are plumbed different so you would be running the coolant in reverse.if it would even bolt up

the best bet is to modify the serpentine system to fit and get the right length belt

Apparently he has some plan for the dampner to make it a v-belt setup, he would need it to spin the opposite direction. The surpentine system on a 4.0L spins "backwards" from a 2.9L stand point for the water pump. I have no idea if it would bolt up correctly though.

Pete

 

[MAKG]

Well, there is also the issue of the cooling fan, and the serpentine system works far better in most senses (such as active tensioning).

I don't see any reason to modify a working system. V-belts are NOT better.

 

[rickcdewitt]

Apparently he has some plan for the dampner to make it a v-belt setup, he would need it to spin the opposite direction. The surpentine system on a 4.0L spins "backwards" from a 2.9L stand point for the water pump. I have no idea if it would bolt up correctly though.

Pete

ya all thats in his post,would YOU want your coolanty running backwards?

 

[MAKG]

ya all thats in his post,would YOU want your coolanty running backwards?

I don't see how that's going to happen.

Both engines push the coolant into the block, on both sides. Almost all V-type engines do that. You don't pump a centrifugal pump backwards and get backwards flow. You get NOTHING.

I'm a bit skeptical that the wrong water pump will bolt in, as it would need to be mirror-imaged, and they aren't symmetrical.

And I still think it's absolutely silly to reengineer a working system. Just use the serpentine system. The more changes you make, the less reliable it becomes.

 

[Psychopete]

ya all thats in his post,would YOU want your coolanty running backwards?

The 4.0L pushes coolant into the engine via. counter clockwise rotation (because it utilized the back of the surpentine belt), 2.9L pushes coolant into the engine via. clockwise rotation. A v-belt setup would cause the water pump to rotate in a clock wise rotation, which would cause a 4.0L water pump on a v-belt (IF the pullies are even interchangeable) system to spin the wrong direction.

I am not sure if it's possible to swap out the internal fins, basically a 4.0L pump casting with 2.9L internals and pulley. Edit: N/M, looking at the castings, this wouldn't work well. They don't look interchangeable either.

I didn't even think of the cooling fan, but one could use an electric to get around that. A lot of people talk bad about them, I've never had a problem with mine, but it's probably because I live in NE Indiana and it only gets up to ~100 degrees at the most.

+1 to just keeping the system, but he stated that he cannot use the surpentine system. Best bet would be to make a trip to the junk yard and pick up some old parts and see what you can come up with. If it doesn't work out, you're not out much money.

Pete

 

[rickcdewitt]

I don't see how that's going to happen.

yeah you're right i guess you'd need to spin the pump backwards(for its application) to do that,probably woulden't pump well though or even pump the same direction.

sorry pete posted without thinking

had to go out and look-the 4.0 and american 2.9 water pumps will not interchange,the pattern and plumbing is way off

 

[Psychopete]

had to go out and look-the 4.0 and american 2.9 water pumps will not interchange,the pattern and plumbing is way off

LOL, I didn't even realize that until I took the time to look at pictures of the castings. Defintely going to run into some major problems (just by the angle of the water inlet/lower hose, you can tell just by that that they're reverse pumps), I don't think there's any simplistic way to do this that would work well.

Pete

 

[gerko]

WOW, big thanks for all the help.

It says in the service manuel that 2.9 waterhouse is the same
but there is a big warning with it that people notice it because it can damage the engine.

That's why I ask it here, because I already tried to fit a 2.9 waterpump but is wasn't the same outside. Absolutely did not fit on the 4.0 engine.

That's why I asked it you guys in the States that maybe your 2.9 are different to ours 2.9 in Europe.

I really cannot use a serpentine, that's why I have to find a solution for this.

Nice weekend to you all

 

[AllanD]

How about saying WHY you cannot use a serpentine belt and
let us help you around that issue.

as a MAJOR issue with a 4.0 is going to be getting the engine
management to work without the toothed wheel part of a 4.0 damper
that the crank trigger "reads"

 

[Big Jim M]

Howdy Gerko

From reading your post it seems to be a problem with the intake of the pump.. Have you thought of having the inlet and outlet changed on your radiator.. That alone might solve the problem you are having.
Big JIm

 

[gerko]

Thanks again for thinking on this matter.

I can't use a serpentine because it can't be put in the car where I want to put it in.

I'm not quite sure but isn't that to easy to just switch the hoses on the pump?
Because hot water simple goes up and then that works against you?

Thanks again!

 

[gerko]

whoopssss!!!
Sorry
just read it another time and you were talking about the radiator.
And I thougt of the waterpump....

No, it is only the question how to get the waterpump to turn to the right with using the pulley of the crankshaft.

 

[MAKG]

I can't use a serpentine because it can't be put in the car where I want to put it in.

Why not?

What you want to do is not very practical. You're going to end up casting your own front cover.... and as Allan said, getting a 4.0L to run without the crank sensor is going to be ridiculous. If you really can't figure out how to get the serpentine belt in, I'm going to suggest you are looking at the wrong engine.