Re: Howdy

Posted by HH56 On 2014/4/24 18:21:45

The mechanical gauge is a step in the right direction. It could well be the electrical gauge or sender failing when it gets warm and should be ruled out. The sender works basically the same as the gas sender with the pressure working a diaphragm which changes the response of a bimetal heater and element setup. It could have issues. Since it is the bimetal type, not something cheap or easily substituted with any modern sender so not something you want to change unless absolutely necessary. Like others, I have decided to run a permanent mechanical gauge in the 47 just as a second opinion option and have mounted mine in an out of the way mostly unseen spot in the engine cmpt.

A question might be was the engine running OK before the oil change that seemed to start the trouble? If so was there any problems? Maybe the old oil was 50 weight or some such. Since it does seem to be heat related now am wondering if the new oil is starting thin and then thinning out too much for a worn component that hasn't been found yet. Cam bearings and the pump itself can't totally be ruled out.

If the mechanical gauge proves the pressure is falling, one thing that might be worth a short term try is some snake oil. I remember the old honey like consistency STP we as teenagers used to pour almost by the quart in old engines to keep them going. O_D might have a better take on it but there is probably a modern equivalent for worn engines that would get you buy for a while.