Mike,
I have done the water pump replacement on several C1's. My tricks to prevent leaks are as follows.
1. Use a gasket on each side of the trapeze front engine mount. Coat them with a good gasket sealer on both sides of each gasket. I use Permatech Hi-Tack Gasket Sealer.
2. Make sure the surface of the bar is exactly (no corrosion, etc.) smooth where the gaskets face to it. If necessary, blast it clean, smooth out any corrosion pits with a belt sander, and repaint before assembly.
3. I put the mounting flange portion of the water pump on my belt sanding table to quickly dress the mounting surface exactly flat. You would be surprised how wavy this surface can be before machining it. Take care to dress them in the same plane with each other.
4. I have four 5" long bolts that I cut the heads off of and rounded the unthreaded ends. I put these in the holes where the pump bolts to. Then it's a simple matter to align everything perfectly by hanging each piece in order, even if the engine is in the car.
5. Once all the pieces are in place, remove one bolt at a time and replace it with the correct bolts finger tight. Then torque everything down.
It will not leak!
Dave Banwarth
I have done the water pump replacement on several C1's. My tricks to prevent leaks are as follows.
1. Use a gasket on each side of the trapeze front engine mount. Coat them with a good gasket sealer on both sides of each gasket. I use Permatech Hi-Tack Gasket Sealer.
2. Make sure the surface of the bar is exactly (no corrosion, etc.) smooth where the gaskets face to it. If necessary, blast it clean, smooth out any corrosion pits with a belt sander, and repaint before assembly.
3. I put the mounting flange portion of the water pump on my belt sanding table to quickly dress the mounting surface exactly flat. You would be surprised how wavy this surface can be before machining it. Take care to dress them in the same plane with each other.
4. I have four 5" long bolts that I cut the heads off of and rounded the unthreaded ends. I put these in the holes where the pump bolts to. Then it's a simple matter to align everything perfectly by hanging each piece in order, even if the engine is in the car.
5. Once all the pieces are in place, remove one bolt at a time and replace it with the correct bolts finger tight. Then torque everything down.
It will not leak!
Dave Banwarth
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