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New water pump leaking from top plug

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90K5

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Just put in a new water pump the other day, but it leaks from the plug that is on the top of the pump...it is tight on there...is this supposed to do that? Would teflon tape of some locktite stop it? The plug seems to be the right size, don't really see why it leaks there...anyone know whta I should do? Thanks
 
Pull the plug, put some sealant on it, and put it back in. I use the Permatex gasket sealant that comes in the white bottle with the brush applicator.


Mike
 
Ok maybe i'm dumb or something, but the teflon tape didn't work. I tried it and I thin it was too thick, because the plug wou;dn't go nearly as far in with it on, even only one layer...any other thoughts?
 
I know its a PITA, but I'd seriously think about taking it back. That plug should be pipe thread, and tightening the plug down should do nothing but seal it even more. In most cases you shouldn't need ANY sealant.

Maybe something else is going on, I mean the system gets up to about 16psi, which isn't that much really, so unless the threads are messed up, I just don't see how it can leak if the plug is in tight!
 
I have seen that cast housing crack right there apparently when the threads were machined. You might check for that.

Mike
 
I've tightened it down even more, not sure if its leaking yet...I have to go home this weekend, 350 mile trip each way...hoping i'm not changing this bitch tonight...again
 
I just put some locktite on it, it went a little deeper in there this time, maybe the locktite lubed it up, well see if it works.
 
Well its not leaking anymore, hopefully it'll stay that way, its not gonna come off easy.
 
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