Proactively replace water pump?

[Vae Victus]

So I've got the radiator off, fan, shroud, and all coolant piping so I can replace it.


Since the cooling system is very rusty internally, should I replace the water pump proactively while I can get to it easily?

Before putting the new radiator on, should I circulate some diluted CLR (Calcium Lime Rust Remover) through the system?

 

[Poser]

Replace the water pump.

 

[Vae Victus]

Replace the water pump.

Clean the block with a rust cleaner solution first?

 

[Steamer]

If you haven't tended to it already, don't forget the block drain. The crud likes to settle and pack up at that low point.

 

[subzali]

Clean the block with a rust cleaner solution first?

Check what's in it. If it has muriatic acid (hydrochloric acid) it will eat your aluminum parts pretty quick (water pump, thermostat housing). Try flushing the block with water first and see how clean that gets you.

 

[Chamba]

Replace the water pump.

X2. Very cheap insurance. $178 delivered from Cruiser Dan at American Toyota Albuquerque.

 

[SteveH]

Be sure to get the correct water pump, there are several styles (fan clutch, non-fan-clutch) and the non-oil cooler version has been discontinued by Toyota.

 

[Spike Strip]

Replace the pump. Flush the block. I personally don't like using caustic cleaning agents unless you're able to really really flush all of it out.

Flushing (and back flushing - thermostat removed) without caustics until the water runs clean is good.

 

[FJ60Seth]

I'd replace the water pump. You should look at the hoses at the same time. I'd stop there.

 

[Vae Victus]

If you haven't tended to it already, don't forget the block drain. The crud likes to settle and pack up at that low point.

I've not done the block yet.

Check what's in it. If it has muriatic acid (hydrochloric acid) it will eat your aluminum parts pretty quick (water pump, thermostat housing). Try flushing the block with water first and see how clean that gets you.

It's so dang rusty in there. My OCD hates that.

X2. Very cheap insurance. $178 delivered from Cruiser Dan at American Toyota Albuquerque.

Replace the pump. Flush the block. I personally don't like using caustic cleaning agents unless you're able to really really flush all of it out.

Flushing (and back flushing - thermostat removed) without caustics until the water runs clean is good.

I'd replace the water pump. You should look at the hoses at the same time. I'd stop there.

Hoses purchased w new radiator from CruiserCorps

 

[Vae Victus]

Be sure to get the correct water pump, there are several styles (fan clutch, non-fan-clutch) and the non-oil cooler version has been discontinued by Toyota.

Is this the correct one?

http://www.cruisercorps.com/water-pump-with-oil-cooler-1-1975-8-1976-free-gasket.html