I have the pump off and never noticed this before. On this GMB pump or other pumps in the past. The gasket matches the plate so it’s the casting that doesn’t align exactly. Don’t know if it impedes the flow any. Has anyone else noticed this or do I have a weird casting.
Water Pump Oddity
- Thread starter Steamer
- Start date
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- Thread starter
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I'm surprised that nobody commented on this. It’s a common pump & the only made in Japan pump that I know of for 69 to 74. I’m sure some of you guys installed these. Maybe I had an odd ball or maybe no one else noticed.
Anyhow, I shaved and smoothed the casting to match the hole in the plate. I forgot to take a pic of the mod but tried to show what I removed by Photoshopping the before pic. (below) It’s been running fine and I’m actually running cooler but with the head rebuild, new cam and all, I can’t say my pump mod is responsible. I’m at least confident it didn’t hurt. 80 deg. F ambient and it’s holding at 165 with the 165 deg. F thermostat in there.
Anyhow, I shaved and smoothed the casting to match the hole in the plate. I forgot to take a pic of the mod but tried to show what I removed by Photoshopping the before pic. (below) It’s been running fine and I’m actually running cooler but with the head rebuild, new cam and all, I can’t say my pump mod is responsible. I’m at least confident it didn’t hurt. 80 deg. F ambient and it’s holding at 165 with the 165 deg. F thermostat in there.
