tolley Posted August 13, 2018 Share Posted August 13, 2018 what should the oil pressure be at tick over with the 3.5 v8 and say 3000rpm. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted August 14, 2018 Share Posted August 14, 2018 Very roughly 40psi at idle and up to maybe 100psi, oil light comes on around 10psi. I think. Approximately. Ish. Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted August 15, 2018 Share Posted August 15, 2018 I think you would be lucky to ever see more than 40-45psi from an old 3.5. At idle with a hot engine there used to be a bit in the RR handbook that told the driver not to worry if the oil pressure lamp came on at idle,as long as it went out with a few revs on all was good. Think the oil lamp went out at 7psi. Old Rovers relied on volume,not pressure. Much volume used to be lost through worn rockers and shafts,replacing them would often quieten them down and make the oil lamp less friendly at low revs. Quote Link to comment Share on other sites More sharing options...
garrycol Posted August 16, 2018 Share Posted August 16, 2018 On 8/14/2018 at 11:54 PM, FridgeFreezer said: Very roughly 40psi at idle and up to maybe 100psi, oil light comes on around 10psi. I think. Approximately. Ish. 100psi - you would be blowing stuff left right and center. No at idle you will get around 20 psi and running with any sort of revs up around 40psi - maybe a bit more, maybe a bit less depending on gauge and engine condition. Quote Link to comment Share on other sites More sharing options...
miggit Posted August 24, 2018 Share Posted August 24, 2018 From my old V8 days, I remember that fitting a low pressure warning sender was a must as a factory 25psi one would cause the warning lamp to glow at idle.... All the Rover V8's have very low oil pressure, even from new! Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted August 24, 2018 Share Posted August 24, 2018 For the P6B, as long as the light is off, you are fine, the gauge was largely unimportant to daily affairs. Quote Link to comment Share on other sites More sharing options...
neil110 Posted August 24, 2018 Share Posted August 24, 2018 I was so concerned about the lack of pressure on my V8 that I fitted the prv spring from a MG to mine. The oil pressure even with that fitted never gets above 30psi, prior to that it ran at about 15psi Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted August 24, 2018 Share Posted August 24, 2018 There is/was a theory the high-pressure spring kits were actually unhelpful leading to the relief valve seizing up / wearing, the RV8 just needs a good volume of squished dinosaur, not high pressure. Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted August 25, 2018 Share Posted August 25, 2018 If you want to upgrade your pump, then fit a front cover off the Buick V6 engines, it has the high volume pump standard and is a bolt-on swap. Alternatively, there are kits available that you can fit, but they are a fiddle to set up with a bunch of shims. Quote Link to comment Share on other sites More sharing options...
miggit Posted August 25, 2018 Share Posted August 25, 2018 ^?? Front cover? Isn't that on the later 4.6 engines? My V8 was a shaft driven pump that was in the sump... I've come across high capacity conversions here http://www.realsteel.co.uk/section1.pdf if anyone does a bolt on upgrade for the Rover V8 you'll find it here! Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted August 26, 2018 Share Posted August 26, 2018 You won't achieve much by raising oil pressure on an old Rover V8, they simply don't need it to either work hard or do high mileages. Worn rockers,shafts,cam,big end and main bearings are your enemy. I've seen plenty of serp 3.9,4.0,4.2 and 4.6 engines with worn out valve gear,cams and bearings with only 100k or so under them. Can't think that the pump around the crank helped them much... Quote Link to comment Share on other sites More sharing options...
miggit Posted August 26, 2018 Share Posted August 26, 2018 I think it was a step backwards... But they'd done away with the distributer, so lost the drive for the original pump.... Why they never kept the old setup with a shortened shaft..... Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted August 26, 2018 Share Posted August 26, 2018 Newer oil pump is waaaaaaaay better.... Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted September 1, 2018 Share Posted September 1, 2018 On 8/25/2018 at 4:53 PM, miggit said: ^?? Front cover? Isn't that on the later 4.6 engines? My V8 was a shaft driven pump that was in the sump... I've come across high capacity conversions here http://www.realsteel.co.uk/section1.pdf if anyone does a bolt on upgrade for the Rover V8 you'll find it here! No, it was for the 3.5 and pre serpentine engines. The Buick cover from the cast iron V6s is a direct bolt-on to the RV8 and has the better flow rate pump. Quote Link to comment Share on other sites More sharing options...
miggit Posted September 1, 2018 Share Posted September 1, 2018 Yes, and the OP was enquiring about the pressure in a 3.5 V8..... As far as I know they never made a serpentine 3.5, only H/C, L/C and EFI...... Quote Link to comment Share on other sites More sharing options...
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