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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,915
Posts838,214
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Most Online1,063
Jun 14th, 2026
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Joined: Mar 2011
Posts: 832 Likes: 23
Talk Morgan Regular
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Talk Morgan Regular
Joined: Mar 2011
Posts: 832 Likes: 23 |
I have a 3.9 and high pressure oil pump. Runs at 5 bar on start up when cold and 3.5 bar when warm/hot.
1980 +8 Blue
And a few others
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Stephen
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Joined: Dec 2017
Posts: 2,223 Likes: 183
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,223 Likes: 183 |
So why don’t we all worry about our tintops which merely have an oil light to warn us of low oil or pressure. Think all these gauges are nice to look at and “set the scene” but sometimes maybe it’s a case of “too much information”? Agree, gauges create a degree of paranoia always watching them.
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice) tis no more
2013 M3W (Olga)
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Joined: Dec 2017
Posts: 2,223 Likes: 183
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,223 Likes: 183 |
I have a 3.9 and high pressure oil pump. Runs at 5 bar on start up when cold and 3.5 bar when warm/hot. What is the high pressure oil pump?
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice) tis no more
2013 M3W (Olga)
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Joined: Sep 2014
Posts: 2,272 Likes: 7
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2014
Posts: 2,272 Likes: 7 |
I have a 3.9 and high pressure oil pump. Runs at 5 bar on start up when cold and 3.5 bar when warm/hot. What is the high pressure oil pump? I thought this upgrade was introduced with the serpentine belt equipped engines (circa 1993?) but Stephen's 1980 car has it (but is this the original engine) It replaced the low pressure/high volume pump of the older models. There were differences in some US export models so I can't be certain that your 1994 car will be high pressure but I am pretty sure it should be. What pressure does it run at once hot?
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Joined: Dec 2017
Posts: 2,223 Likes: 183
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,223 Likes: 183 |
My 94 +8 runs on volume of oil rather than pressure the gauge reads around 2 to 2.5 bar when hot.
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice) tis no more
2013 M3W (Olga)
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Joined: Feb 2008
Posts: 963
TM Photographer of 2011 Talk Morgan Regular
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OP
TM Photographer of 2011 Talk Morgan Regular
Joined: Feb 2008
Posts: 963 |
So why don’t we all worry about our tintops which merely have an oil light to warn us of low oil or pressure. Think all these gauges are nice to look at and “set the scene” but sometimes maybe it’s a case of “too much information”? Yeah, I thought the same 
 1998 +8 (permanently out of service  )
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Joined: Jul 2007
Posts: 27,852 Likes: 767
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,852 Likes: 767 |
But they look shiny & sparkly. I miss the oil gauge on my 3.7l Roadster
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Feb 2020
Posts: 586 Likes: 21
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2020
Posts: 586 Likes: 21 |
But they look shiny & sparkly. I miss the oil gauge on my 3.7l Roadster I love my oil guage, touchwood it's always been a source of great comfort! Not so much the fuel gauge always, but I'm getting to trust it more- last week I pumped in 55.5 litres having feathered the throttle for the last 15 miles- it had said empty for over 20 miles, began to sweat a bit! (275 miles on that tankfull)
"DOT" 35th Anniversary Edition Plus 8- family owned from new. Rolls Royce Pewter.
06 Saab 93
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Joined: Aug 2014
Posts: 2,121 Likes: 71
Talk Morgan Expert
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Talk Morgan Expert
Joined: Aug 2014
Posts: 2,121 Likes: 71 |
So why don’t we all worry about our tintops which merely have an oil light to warn us of low oil or pressure. Think all these gauges are nice to look at and “set the scene” but sometimes maybe it’s a case of “too much information”? Agree, gauges create a degree of paranoia always watching them. My oil pressure sender failed some times ago! I tried to ignore the extreme "high pressure" but at the end the "missing" pointer disturbed me enormously ..... 
Last edited by bmgermany; 01/05/21 03:55 PM.
2005 4/4 1800ccm Duratec and a lot of HONDA CX500.......
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Joined: May 2010
Posts: 9,554 Likes: 134
Needs to Get Out More!
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Needs to Get Out More!
Joined: May 2010
Posts: 9,554 Likes: 134 |
Did a run today to pick up another Morgan ( more to follow elsewhere  ) When warm the gauge showed 3-3.5 bar pressure and down to 1.5-2 bar at idle. Coolant temp showed 80-85 with no traffic stops to reduce air flow. When my sender failed seeing the gauge false reading was concerning but knowing the ecu was getting separate data and not reacting was a mitigating factor. A new sender gave peace of mind. Technically it could be considered superfluous but does add a nice touch to the dash.
Plus Four MY23 Furka Rouge
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