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Triumph Torque    Cars    2000/2500/2.5PI  ›  Low oil pressure
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Low oil pressure Print
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aaron77
January 22, 2007, 9:15am Report to Moderator

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Hi.

After going for an out of town drive the oil pressure light comes on under 1200rpm and also sometimes after just driving around town for a bit. Any ideas?

Thanks guys
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Richard B
January 22, 2007, 10:25am Report to Moderator

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Assuming the oil level is ok, sounds like a potential rebuild; new pump and bearings I'm afraid.


Surrey AO and Triumph Hoover,††Location: Guildford - Surrey,†

Spitfire 2.5PI - 1967,† PI Saloon - 1969,† PI Saloon MkII - 1971†(stalled project),†PI Estate - 1969 (to restore)
Stag - 1971,††† Custody of :††MkII††2000 Estate - 1973 (my wife's)
Daughters own: Herald 1500 -1961, Herald 1200 Coupť 1962, Dolomite 1300 - 1976

"When you were sitting in that capsule listening to the count-down, how did you feel?" Well, the answer to that one is easy. I felt exactly how you would feel if you were getting ready to launch and knew you were sitting on top of two million parts -- all built by the lowest bidder on a government contract. - John Glenn
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mikeyb
January 22, 2007, 11:00am Report to Moderator

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It could be a faulty pressure transmitter - my Sprint did this once, put a gauge on, showed ok, put a new transmitter on and everything went back to normal. 

Cheap and easy to do before you rip your engine apart!


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Current Triumph count 17 16 15 14 13 14 12 13 12 13 14

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64 Herald Rally Car - 2 autotest, 8 Rally Sprints, 3 Road Rallies, HCR '09, 4 Autosolo, Cadwell Track Day
67 GT6 Mk1

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72 Mk2 PI with TR6 engine - Nachrict Feb & Nov '06, Nachrict Feb '07, HCR '08, RBRR '08, LCC '07, '08, '09

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Lord Sorbington
January 22, 2007, 12:16pm Report to Moderator


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Worn main bearings would give low oil pressure would't they?  If they they were this bad would there be a bit of noise too?

Can worn big ends affect the oil pressure?  Had a Nova with knackered big ends once but oil pressure was fine.

I speak as someone whose 2000 has recently started to make a bit of a knock at idle even though oil pressure seems OK.  No rattle at higher revs as I'd expect with big ends though, or nasty noises on start up. Have got a fixed fan, not a viscous one so can rule that out.  confusing!


2000 mk2

Location: Sorbingtonworld

10CR 08
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Spitfire2500
January 22, 2007, 12:57pm Report to Moderator

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I know this sound's obvious -- has it got the right grade of oil in it?

Otherwise just what the other's have already said.

Assuming it's got the right oil then I'd pop the bonnet and listen to the engine to check for bearing noise when the oil warning light comes on. If you can't hear anything then I'd be tempted to check the wiring to the oil pressure switch and change the oil pressure sender.

If it persists then you've probably got an engine problem (e.g. could be bearings, oil pump etc)


Bill Murray
--
'78 Spitfire 2500 - Bashed and bruised  
'76 2000TC Saloon - Getting mended
My other motoring vice:
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Nick Jones
January 22, 2007, 11:12pm Report to Moderator

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Also worth whipping the relief valve out and making sure the spring and plunger are still ok.  If this is not closing properly the oil will leak past before it should reducing pressure.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012 & 10CR2013.
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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GigGleR
August 6, 2007, 9:03pm Report to Moderator
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Hmmm, just been fidling with the 2.5 we've pu tinto the mk1 estate. This car had a oil pressure gauge fitted to it when it had the 2ltr engine in it and this gauge was reading 10psi(!) when the engine was hot at idle, climbing to about 30 under load. Since then fathers ahs whipped the the relief valve out and replaced it with one from another engine we happened to have lying around the workshop. This has increased the pressure to 30psi at idle climbing to to 50ish under load.

Anyone know what standard pressures should be? this engine had its big end bearings replaced when we put it in but not the mains as we didn't want to do a full engine rebuild taking the crank out. It as also recently had an oil cooler fitted with thermostat

Really don't want to start stripping the engine since this car is supposed to be going on the 10cr!!


Triumph Vitesse Mk2 2ltr Convertible , a TR4 And a mk1 2000 estate as well!!- North Derbyshire

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AlanChatterton
August 6, 2007, 9:34pm Report to Moderator
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Is this when hot, or cold.

Hot, as long as you have over 30psi running under load, leave well alone!

Mine, when hot, has 25psi tickover and 50psi running, plenty!


Alan Chatterton
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Triumph 2000/2500/2.5 Register

LYB864K   1972 Triumph Stag Estate (DEL 33)

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GigGleR
August 6, 2007, 9:47pm Report to Moderator
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yeah, it's 30psi at idle when hot and 45-55 under load. At least I don't have to try and get the damn thing back out of the car before september then!  

thanks for the peace of mind  


Triumph Vitesse Mk2 2ltr Convertible , a TR4 And a mk1 2000 estate as well!!- North Derbyshire

earn a little extra cash for those spares  http://adbux.org/?r=GigGleR
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Greeks
August 6, 2007, 9:57pm Report to Moderator

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I think it's supposed to be 45-65 when hot at 2,000 rpm. But it's best to give it a good half hour running time as the pressure drops a bit once it's really warmed up.



1978 2500 S with Mk1 Pi engine Wade 'crazy' cam on SUs for now

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