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Jul 21st, 2025 | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | Hey guys,
My water pump just went out on me after I got my truck running. I got a rebuild kit on ebay and have gotten everything pulled apart and ready for cleaning. I'm looking through my service manual and it says to use "glass cement" to attach the pump seal to the impeller.
Does anyone know what a modern alternative to glass cement is? or should I pick up some epoxy made for glass? I might be over thinking it, but would like to do it right if I can.
Thanks!
1954 GMC 350-27
| | | | | Joined: Dec 2008 Posts: 1,915 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,915 | | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | Maybe some of these? It would interesting to hear from a "pro" regarding these being used on (or, in your cooling system) with your rebuilt pump? | | | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,747 | So if I read the Sodium silicate properties correctly(an issue that continues). You are supposed to put a "water soluble" "glue" around the seal in a water pump? Color me dim but why?
Steve H
| | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 |
1954 GMC 350-27
| | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | I was talking to my neighbor and he suggested rear view mirror glue. Easy to get and cheap. I think that's what I'll end up doing
1954 GMC 350-27
| | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | I got my pump all cleaned up and re assembled and finally got it installed after work today.
I started pouring coolant in after getting all of the hoses clamped and after about 2 gallons it started leaking from under the water pump. It seems to be coming from the weep hole at the bottom, but I followed the installation service manual closely...
any ideas? I didn't forget any parts and everything fit together as it should with proper clearances. Does the seal just need to be broken in?
1954 GMC 350-27
| | | | | Joined: Aug 2011 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2011 Posts: 45 | When I started out in the repair business we always ran the engine for about a minute after installing a new pump to "break in" the seal, It all depends on the type of seal being used.
Joe
The older I get, I only want to work on older rigs.
| | | | | Joined: Aug 2011 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2011 Posts: 45 | I should have added without coolant.
Joe
The older I get, I only want to work on older rigs.
| | | | | Joined: Apr 2016 Posts: 96 Shop Shark | | Shop Shark Joined: Apr 2016 Posts: 96 | Maybe that's all I need to do?
I'll give it a shot this weekend, thanks!
1954 GMC 350-27
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