Lotus Elan

Elan Sprint oil Pressure

PostPost by: cdingram » Mon Jul 08, 2024 11:20 am

Hi,

I took a car out for a test drive on the weekend and the oil pressure was showing at around 65 when driving. I believe the norm is only around 40 so I was just wondering if 65 is acceptable?

If not, what should I look for as the cause?

Thanks

Chris
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PostPost by: rgh0 » Mon Jul 08, 2024 11:45 am

sounds like it has a high pressure pump fitted for some reason. normal relief valve setting is around 40 psi the typicalhigh pressure pump is around 60 psi

cheers
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PostPost by: joe7 » Mon Jul 08, 2024 2:15 pm

What is the oil pressure at idle when fully warmed up?
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PostPost by: cdingram » Mon Jul 08, 2024 3:19 pm

joe7 wrote:What is the oil pressure at idle when fully warmed up?


Around 40
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PostPost by: elans3 » Mon Jul 08, 2024 7:55 pm

Yep, it has a High pressure pump. I'd advise taking it off and fitting a standard pump, a good s/h Burman will do the job nicely. There's another original make, but I can't remember the brand name at the mo.
I've had to do it with two of my Elan's that came with HP pumps. They don't need one.
Vast majority of new ones are either HP, or non-descript make, you're much better off with a good S/H original one.
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PostPost by: draenog » Mon Jul 08, 2024 7:57 pm

The other make to Burman was Hobourn Eaton :) NOS pumps sometimes turn up on ebay.
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PostPost by: elans3 » Mon Jul 08, 2024 7:59 pm

draenog wrote:Hobourn Eaton :)

That's the one, both should have either "FORD", or "FOMOCO" cast into the pump.
I bought both of mine from Ebay, they turn up regularly,
Current :- Elan S3 DHC SE S/S 1968,
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Elan S3 FHC Pre-Airflow 1966
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PostPost by: ericbushby » Mon Jul 08, 2024 10:12 pm

Hi Guys,
When I had a high pressure pump on my car, it read 60psi at running revs but 25psi when idling as it does now with a 40psi pump. Our cars do not run at 40psi when idling.
It seems to me that both readings are high so I wonder if the gauge is faulty and reading about 50% over at all times.
It may be the gauge that is wrong, not the pump. I suggest you check the oil pressure with a different gauge before spending money on a pump.
Best of luck
Eric in Burnley
1967 S3SE DHC
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PostPost by: 2cams70 » Tue Jul 09, 2024 3:24 am

There’s a number of different variations of Ford pumps. All will work but some are better than others. Best ones are the latest ones with 731M part number cast into the body.

FYI - early canister type filter pumps have a lower flow rate, intermediate spin on filter pumps have separate oil bypass, late spin on filter pumps have oil bypass integrated with intake port.
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PostPost by: 512BB » Tue Jul 09, 2024 8:10 am

'both should have either "FORD", or "FOMOCO" cast into the pump'

Or even Burman. This one was taken off a twin cam. £14 if anyone wants it. Will need a good clean.

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PostPost by: holywood3645 » Wed Jul 24, 2024 9:01 am

Good luck taking it off if the engine is still in the car!
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PostPost by: v6b5n4m3 » Wed Jul 24, 2024 11:38 am

65 psi is indeed higher than the usual 40 psi. This could be due to a blocked oil passage or a malfunctioning oil pressure relief valve. It might also be a faulty oil pressure sensor. Check these areas first to identify the cause.
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PostPost by: pharriso » Wed Jul 24, 2024 1:24 pm

v6b5n4m3 wrote:65 psi is indeed higher than the usual 40 psi. This could be due to a blocked oil passage or a malfunctioning oil pressure relief valve. It might also be a faulty oil pressure sensor. Check these areas first to identify the cause.


As previously posted, it's a high pressure pump.
Phil Harrison
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PostPost by: alan.barker » Wed Jul 24, 2024 3:56 pm

holywood3645 wrote:Good luck taking it off if the engine is still in the car!

No problem just remove Engine Mount Screws through Chassis. Block of wood under Sump and Scissor Jack
Alan
Alan.b Brittany 1972 elan sprint fhc Lagoon Blue 0460E
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