Tapps33
Full Access Member
So I've been looking at the coolant diagram and I've got a few thoughts regarding the electric pump, and whether or not it'll work.
Here you can see the stock coolant flow:
If I were to replace the stock pump with a e-pump, part of the process involves removing the thermostat. so the new coolant flow would look something like this: (pardon the cheesy editing, I was in a hurry and used powerpoint then....cause I'm too cheap to buy anything nice!)
On the plus side, we'd be getting rid of one of the connections coming off the outlet tube as there's no longer a reason to recirculate coolant while the engine is warming up. Plus, I think we can get rid of the majority of the thermostat housing. I have to look at the diagram again, but my brazing/tig skills may be put to the test by just fabbing up a few aluminum tube "Y" "T" or connections.
One problem I do foresee...aside from the fabrication of the crossover tube, is how to bolt new inlets to the block....although right now I'm leaning toward cutting the guts out of the stock pump housing, plugging the shaft hole and letting it free flow.
As for the crossover tube, I'm with Beemernut, I feel as though there has to be a way to fab something up real quick out of aluminum and the tabs found previously.
Although, it almost....and I stress almost, looks like if you removed the stock pump and utilized some sort of fitting for the coolant inlet, you could just use 90 degree fitting and go straight out the front of the block....obviously, some grinding may be involved.
As I said before, I'm about a month or two our from this project, but in truth, the e-pump and PWM controller is about half the cost of an OEM LR water pump and thermostat....so there's a definite cost benefit to it. Plus I like having the controllability of a PWM electric pump and well, less mechanical drag on a engine is less mechanical drag. I won't really know what's possible until I get in there, but if I can swap to an e-pump, ditch a few of the plastic pipes and just use a few aluminum connectors as a crossover tube replacement....I'm in!
LR4 modified coolant system.pdf
Here you can see the stock coolant flow:
If I were to replace the stock pump with a e-pump, part of the process involves removing the thermostat. so the new coolant flow would look something like this: (pardon the cheesy editing, I was in a hurry and used powerpoint then....cause I'm too cheap to buy anything nice!)
On the plus side, we'd be getting rid of one of the connections coming off the outlet tube as there's no longer a reason to recirculate coolant while the engine is warming up. Plus, I think we can get rid of the majority of the thermostat housing. I have to look at the diagram again, but my brazing/tig skills may be put to the test by just fabbing up a few aluminum tube "Y" "T" or connections.
One problem I do foresee...aside from the fabrication of the crossover tube, is how to bolt new inlets to the block....although right now I'm leaning toward cutting the guts out of the stock pump housing, plugging the shaft hole and letting it free flow.
As for the crossover tube, I'm with Beemernut, I feel as though there has to be a way to fab something up real quick out of aluminum and the tabs found previously.
Although, it almost....and I stress almost, looks like if you removed the stock pump and utilized some sort of fitting for the coolant inlet, you could just use 90 degree fitting and go straight out the front of the block....obviously, some grinding may be involved.
As I said before, I'm about a month or two our from this project, but in truth, the e-pump and PWM controller is about half the cost of an OEM LR water pump and thermostat....so there's a definite cost benefit to it. Plus I like having the controllability of a PWM electric pump and well, less mechanical drag on a engine is less mechanical drag. I won't really know what's possible until I get in there, but if I can swap to an e-pump, ditch a few of the plastic pipes and just use a few aluminum connectors as a crossover tube replacement....I'm in!
LR4 modified coolant system.pdf
but the next time my crossover pipes need to be replaced my dealer said they would gladly replace them with these. I haven't done a ton of research on them since I just did my crossover pipes less than 1K miles ago but it seems like something at least worth checking out.
