Re: Sealing Temperature Gauge Lead

Posted by HH56 On 2014/9/24 11:32:37

If a good quality gauge set has adapters by all means that solves the problem. The adapters that came with the elcheapo temporary gauge set (oil/temp/amps) I installed to use while the dash is out were for smaller & for metric holes. The nut alone fit the Packard head perfectly -- just didn't push the bulb into the head far enough to seal. I'd have to doublecheck but think the 47 356 head is standard NF 5/8-18 thread. I was able to buy a bolt that fit perfectly and used that to block the opening until I decided to install the temporary gauge. No idea what size hole is in the prewar heads.

When the real gauges are reinstalled, even though the aftermarkets are not top end I plan on keeping the gauge set installed as a backup. They should at least give some kind of second opinion if something seems amiss. Am thinking an adapter block made to fit under the radiator hose/thermostat housing and tapped for one of the smaller sender adapters will be the way I do the temp gauge. Oil gauge is already permanently plumbed to the next to rear port of main gallery on passenger side. Permanently wiring a second Amp gauge remotely poses a bigger question because of the length in extra wire needed. I may just run wires to have them available but not connected unless there is a reason.