Oil gauge nightmare!
Safety Car
Joined: Jan 2004
Posts: 4,549
Likes: 343
From: Glastonbury CT
Follow your wires from your oil preassure switch on block and look for nicked or wire laying on metal of car. Look for folds in wire for it could be touching on fold. Insulate with Scotch 33 plus tape with three wraps of tape.(vinyl tape sticky on one side)
Melting Slicks
Joined: Feb 2018
Posts: 2,328
Likes: 724
From: Marietta GA
You will need to follow the instructions on the right side of the sending unit to ascertain if the problem is the Wire or the Gauge. Certainly, it’s less pain if you don't have to dig into the gauge cluster. If you are lucky, it’s a frayed, broken, or grounded wire.
Burning Brakes
Joined: May 2013
Posts: 789
Likes: 129
From: Los Banos CA
If the gauge is pegged with the key on, but engine not running, then you have a broken wire/bad connection between the gauge and the sender. A shorted wire will cause the gauge to read near zero.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
To get the gauge needle to settle down, you need resistance. A pegged gauge indicates a poor GRD or none at all. But how do you know which is at fault for the poor GRD? Gauge cluster behind the dash? Or poor GRD with the sending unit itself? One of the GRDs is accomplished through the senders threads contacting the iron or aluminum engine.
Its quite common to apply either too much thread tape or gobs of thread sealant onto a sending unit wether its being installed into the block or head. Too much of either type of "leak stop" will prevent the sending unit from obtaining a perfect GRD through the threads.
Its quite common to apply either too much thread tape or gobs of thread sealant onto a sending unit wether its being installed into the block or head. Too much of either type of "leak stop" will prevent the sending unit from obtaining a perfect GRD through the threads.
Last edited by HeadsU.P.; Oct 8, 2020 at 08:21 PM.
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