The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What does your oil pressure gauge show at idle?

Dead Parrot · 07-03-2021, 10:20 PM

If you have an electric oil gauge, make sure the sender is matched to the gauge. IIRC - there are 3 pressure ranges. My 75 has a mechanical and shows near max at speed and around 15~20 at idle once hot. No idea how accurate a 45+ year old gauge is.

Temp gauge behavior is normal if the OEM sender was replaced. Most aftermarket senders don't come close to matching the temp curves of the original. Grounding the sender end of the wire should give a max temp reading on the gauge. There are several threads on temp gauge - sender match ups.

07-03-2021, 10:20 PM	#3
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,479	Re: What does your oil pressure gauge show at idle? If you have an electric oil gauge, make sure the sender is matched to the gauge. IIRC - there are 3 pressure ranges. My 75 has a mechanical and shows near max at speed and around 15~20 at idle once hot. No idea how accurate a 45+ year old gauge is. Temp gauge behavior is normal if the OEM sender was replaced. Most aftermarket senders don't come close to matching the temp curves of the original. Grounding the sender end of the wire should give a max temp reading on the gauge. There are several threads on temp gauge - sender match ups.