Polyhead water pump question

[Dakar Timm]

I've notice the coolant gradually disappears from the radiator after drivng for several hours .
When parked there is never any signs of leakage on the floor .
At this point, I'm thinking the seal on the water pump is leaking once the engine warms up .
It the water pump from a 318 polyhead the same as the later LA 318 ?
I really don't trust any autopart internet listing to know the differance .
Thanks Timm

 

[icetech]

I've notice the coolant gradually disappears from the radiator after drivng for several hours .
When parked there is never any signs of leakage on the floor .
At this point, I'm thinking the seal on the water pump is leaking once the engine warms up .
It the water pump from a 318 polyhead the same as the later LA 318 ?
I really don't trust any autopart internet listing to know the differance .
Thanks Timm

Poly pump is different, poly outputs the hose on the drivers side, LA on the passenger, Poly is cast iron and has a mount for a power steering pump, LA doesn't.... also.. check your radiator cap and it's PSI rating.. you could just be pissing steam out the overflow..

 

[icetech]

 

[Dakar Timm]

Hey ,that was quick for a response . I don't see coolant anywhere in the engine comparment . I'm thinking that perhaps I should replace the radiator cap as well .
I'm not sure where my pressure tester is anymore .. It's been a while since I've had to use one...

 

[icetech]

Hey ,that was quick for a response . I don't see coolant anywhere in the engine comparment . I'm thinking that perhaps I should replace the radiator cap as well .
I'm not sure where my pressure tester is anymore .. It's been a while since I've had to use one...

well.. a cap is super cheap... also check your oil (pull the dipstick and make sure it looks like oil, not chocolate milkshake)

 

[icetech]

also if your waterpump seal was leaking you would know it, you would have a line down the pump behind the pulley.. my 2018 grand cherokee has a orange line right now.. it's not bad enough foe me to fix it yet though

 

[1KoolBee]

So on my poly, it had a small hole on the left side of the aluminum front cover that was leaking. After cleaning the corrosion off, I had a big hole (1/2”). I used some carbon fiber screen and JB weld to do a quick fix. Been holding for a couple years now. Apparently the late style cover will work if you plug extra hole on left side of poly. I’m assuming a late water pump could be adapted then too. Guess someday it will get TIG welded if it doesn’t hold until this gets dropped in: