Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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88v8
Ivor Duarte
Gloucestershire UK
(1041 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Tadpole time
Posted by: 88v8
Date: July 31, 2023 08:01AM

Since my car came back from the shop that had it for seven months the oil pressure at idle has collapsed. Lord knows what they did with it....
Previously it was around 10-12psi hot at 770rpm idle, now even with new 20/50 and filter, it barely troubles the (capillary) gauge.

Clutching at straws, I have a new tadpole and spring that I bought many years ago for another engine.... so here's a silly question... if I remove the pressure relief valve will the oil pump lose its prime?

Ivor


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Tadpole time
Posted by: BlownMGB-V8
Date: July 31, 2023 08:49AM

Since it is on the output side you should be OK Ivor. But don't let it sit open longer than you have to.

Jim


88v8
Ivor Duarte
Gloucestershire UK
(1041 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
1974 Land Rover Lightweight V8

Re: Tadpole time
Posted by: 88v8
Date: August 21, 2023 08:02AM

Just done the deed.
The new spring was a lot stronger, didn't want to go back in, difficult from underneath, it all escaped at one point and fell on the gravel, hardly the antiseptic environment one might wish.

The system did not lose the prime... ran it for a minute or so, can see there's more pressure than before, maybe the spring maybe the valve has a better seat, see how it is when fully hot.

Ivor
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