Water pump curiosity's

[live4theking]

So, I decided to replace my water pump on my 68 NYer. Tonight was doing the removal portion of the job. It had either 57,000 or 157,000 and the only maintenance history I have is that it was last on the road in 1979 or 80 prior to my buying it.

I've had a couple of small company leaks that I've had to track down. Since they were dealt with I figured the seals in the pump are probably shot too.

Is the corrosion around the seal a sign of failure? The slight green coloring.

When I pulled the pump I noticed it is a Mopar pump and I was surprised at the condition I'd the impeller considering what the coolant looked like that I drained from it when I first got it.

There is always one bolt that is a bugger and sure enough I fought one of the fan bolts for what felt like half the night.

 

[cbarge]

Make sure you get the correct pump,.
There is a difference between cars with and without A/C.
Also there is a difference between the late model one and the 68 you have.

 

[LocuMob]

Make sure you get the correct pump,.
There is a difference between cars with and without A/C.
Also there is a difference between the late model one and the 68 you have.

Can you tell me what the difference is between the A/C and non A/C pumps?

 

[Big_John]

Some interesting reading on water pumps starts at post #191 in this thread on the Dodge Charger forum. Overheating issue resolved....interesting read !

 

[cbarge]

Can you tell me what the difference is between the A/C and non A/C pumps?

The length of the snout and number of impellers

 

[Ripinator]

There is always one bolt that is a bigger and sure enough I fought one of the fan bolts for what felt like half the night.

Next time, leave the fan attached to the water pump, remove the four water pump bolts and lift it all out together. Then its a lot easier to get to the fan bolts, once its all on the bench.

 

[Ross Wooldridge]

AC water pumps have 6 impeller fins, while non AC ones have 8.

 

[live4theking]

So, for giggles I went to RA and looked at the pumps they have, 3 out of 5 of them had 8 blades instead of 6. Why? Which one should I have?

 

[Ross Wooldridge]

6 blades for AC, 8 blades fon non AC.

 

[live4theking]

6 blades for AC, 8 blades fon non AC.

Our post crossed, thanks.

 

[live4theking]

Some interesting reading on water pumps starts at post #191 in this thread on the Dodge Charger forum. Overheating issue resolved....interesting read !

I had read this previously, but had not remembered much of it. For my visual nature I put it in a chart to be able to process it better. This is not my information and I may have even copied it over wrong so you should read the post Big_John linked to.

 

[Gerald Morris]

Can you tell me what the difference is between the A/C and non A/C pumps?

The AC pumps have a thicker body for greater volume, and use a smaller pulley for higher angular velocity (more rpm) from the crankshaft belt as I recall. The impeller blade count differs also.

 

[live4theking]

Well it turn out that I went from a pump with a 3.5" Dia, 6 fins to one with a 4.375" dia., 6 fins. Even though I didn't previously have any cooling issues I certainly shouldn't now either.