Re: Motometer and loose fit/leaking water.

Posted by Jack Richard on Oct. 15, 1998 at 18:53:29

In Reply to: Motometer and loose fit/leaking water.
posted by J.R. Aiello on Oct. 15, 1998 at 13:47:56

I've also had this problem, and finally solved it: The motometer should not leak if you replace the red fiber washer with a rubber washer cut to fit the recess in the body. You may have to experiment with different thicknesses or shims under this washer to get the upper part to seal well when closed - it should not feel "loose", but rather take a little force to close fully and seal up. Don't try to bend the potmental tabs! Another source of leakage is around the thermometer swivel in the center of the upper part. If it leaks there, make a .010" brass disk the same diameter as the brass part already there, and put it under the nut which holds the thermometer in place, using a little RTV sealant. You may have to adjust the gasket thickness again to get things to close well and seal up. It can be done, and by using a 30% solution of Sierra antifreeze and an aftermarket overflow tank attached to the end of the overflow tube, a lot of the mess of highway driving can be eliminated.
Good luck!

: Ah, more of the simple questions.

: I have a motometer on my '30 Sport Coupe. When it gets warm, and the engine gets into high rpms, I get green foam coming out of the neck of the radiator. I really thought there was something wrong. Sprayed the radiator shell, windshield, everything. I have water/anti-freeze inside, so I guess that's where the color comes from.

: I installed a new gasket between the cap and radiator neck, and a new one between the cap and the motometer. There seemsed to be a cork gasket up under the motometer upper part but I couldn't find a replacement for that, just the neoprene red on the goes on top of the lower half (above the hex screws). The problem is, the meter seem loose when I close it on the cap, like the red gasket isn't sealing. My father-in-law says it's the clips on the meter. "All you have to do is bend them down gently with a hammer so it pulls the cap down farther." AHHHH!

:
: I have two questions:

: 1. Is this green foam normal, but just usually inside the radiator, Or do I have oil (from the engine) or grease (from the water pump) getting into the water?

: 2. Do I need to replace that cork sealer, not just the red ring, or should I do like he said (horrors) and bend the clips down to make it fit tighter? I really have reservations about doing that. I hear these are expensive, and hard to find accessories.

: Thanks in advnace for the help and patience.
: J.R.




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