Water Impeller Question

Joined
Mar 6, 2001
Messages
48
Likes
0
#1
Hey everyone,

I'm in the process of replacing the water pump seal and oil seal in my 93 cr250, but I can't seem to remove the impeller. When I try to loosen it with the right crankcase cover still attached, the whole impeller and shaft turns. And it won't budge when I remove the cover and try to hold on to the plastic sprocket (I can't get the proper grip on the sprocket).

So my questions are:
1) Is the impeller reverse threaded or regular threaded?
2) Does the fact that the impeller can turn while still attached to the engine mean that something else is wrong?

I'd hate to break the plastic sprocket or otherwise damage anything by not knowing what to do! Thanks,

Jon
 

john stu

Lifetime Sponsor
Joined
Jan 7, 2002
Messages
790
Likes
0
#2
i belive its regular thread and i usualy just loosen it before removing the outer case if it spins it might be broken inside (unless the motor is turning over)i would remove the cover and check befor proceding.
 
Joined
Mar 6, 2001
Messages
48
Likes
0
#3
yes, it is turning the motor when I try to loosen it (the spocket is not broken). Is there a way to stop it from turning the motor, or does this indicate a different problem?

Jon
 
Joined
Mar 6, 2001
Messages
48
Likes
0
#4
Well, with I said to hell with it and with a little muscle and a propane torch I finally got it off. But that still leaves me with my other question, does the fact that turning the water pump will turn over the motor indicate a problem, or is that how its supposed to work?
 
Joined
Jan 10, 2002
Messages
494
Likes
0
#5
Originally posted by chooch
Well, with I said to hell with it and with a little muscle and a propane torch I finally got it off. But that still leaves me with my other question, does the fact that turning the water pump will turn over the motor indicate a problem, or is that how its supposed to work?
How about using the impact to get it off.
 
Joined
Dec 24, 2001
Messages
362
Likes
0
#6
The water pump should turn anytime that the motor does.
If it doesnt then you have problems.
overbore.