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I recently purchased a new water pump from Dale at www.powerstrokeshop.com
. I haven't had time to do the install until now. While I was prepping it (pre-installing the thermostat and inlet neck onto the pump housing), I noticed that there is a gap of about 0.4" where it appears the thermostat should contact the surface of a bypass in the pump. You can see it in This Photo.
Is something wrong with the pump housing or the thermostat or is this normal?
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Nice Photo, that .4 gap looks like what I found with my new pump. I bought one and tested it with the stock thermostat installed, submerged in water bringing the temperature of the media up slowly and measuring the gap with Sarrett taper gages. My wife asked me the other day if I was going to cook any more car parts on her stove or could she put the big pot up. The stock thermostat (195F.) progressively closed up the gap between the by pass depending on the temperature. It did not however completely close, there was .060" gap at boiling point, no pressure 212 F. degrees. I tested two other thermostats, 205 F., and they didn't close up the by-pass gap significantly. Good luck, 106