Erratic oil pressure
Discussion
Ok I changed the oil & filter, I now have the gauge giving me some erratic readings, it shows a steady 50psi when stone cold ( used to be 60-65psi), 38 -40psi when hot (90 -95 water temp)at idle,used to be solid 40-42psi. It is slow to increase when revved also slow to drop down & only shows approx 50psi hot @ 3000rpm used to be 60-70psi?
I expected the pressure to be higher as I have used 5 -40w Fully syn oil & believe that it had Mobil 1 0-40w, I say I believe because I am beginning to think that the 5-40w I have put in was thinner than the stuff the oil that came out .
2 questions probably off track but here goes, I filled the engine to what I thought was full, left it over night & it showed it was under so I topped up again to a smiggen over the level, there was some improvement.
This car has had an extra Oil cooler fitted along with the original ,will I need to put more than the standard amount in even though the dipstick shows full??
The other question is ,the filter that I took off was smaller than the new replacement, the replacement is a Land Rover V8 filter PH5443, would this make any difference ? Still cannot understand why the gauge is slow to react though ??
I expected the pressure to be higher as I have used 5 -40w Fully syn oil & believe that it had Mobil 1 0-40w, I say I believe because I am beginning to think that the 5-40w I have put in was thinner than the stuff the oil that came out .
2 questions probably off track but here goes, I filled the engine to what I thought was full, left it over night & it showed it was under so I topped up again to a smiggen over the level, there was some improvement.
This car has had an extra Oil cooler fitted along with the original ,will I need to put more than the standard amount in even though the dipstick shows full??
The other question is ,the filter that I took off was smaller than the new replacement, the replacement is a Land Rover V8 filter PH5443, would this make any difference ? Still cannot understand why the gauge is slow to react though ??
With the weather getting colder I find it take a little longer for the oil to warm up enough to thin out so it gets down the very thiter half an hour in slow tn pipe to the gauge. Gauge reacts much quicker after half an hour in traffic.
I did an oil change recently and put a 5-30 oil in for the winter, that shaved 5-10psi off my hot running pressure from the 15-50 I used for the summer.
I did an oil change recently and put a 5-30 oil in for the winter, that shaved 5-10psi off my hot running pressure from the 15-50 I used for the summer.
Hi gruff yes it is colder but I went the other way & have put in a heavier oil in as opposed to lighter oil as you have ,so would have expected the opposite really.
Gaz , yes I did fill the filter right up , it overflowed as I screwed it on it was brimming?
I think my usual trick of not getting my arms covered in hot oil when removing the old filter may have backfired here, I always pierce the old filter so the old oil drains out of the old filter so its a lot cleaner to take off...
Any thoughts about if extra oil capacity maybe needed for the extra oil cooler ?
The slow gauge is a new one though ?
Gaz , yes I did fill the filter right up , it overflowed as I screwed it on it was brimming?
I think my usual trick of not getting my arms covered in hot oil when removing the old filter may have backfired here, I always pierce the old filter so the old oil drains out of the old filter so its a lot cleaner to take off...
Any thoughts about if extra oil capacity maybe needed for the extra oil cooler ?
The slow gauge is a new one though ?
gruffalo said:
With the weather getting colder I find it take a little longer for the oil to warm up enough to thin out so it gets down the very thiter half an hour in slow tn pipe to the gauge. Gauge reacts much quicker after half an hour in traffic.
I did an oil change recently and put a 5-30 oil in for the winter, that shaved 5-10psi off my hot running pressure from the 15-50 I used for the summer.
I hate this chuffing key board.I did an oil change recently and put a 5-30 oil in for the winter, that shaved 5-10psi off my hot running pressure from the 15-50 I used for the summer.
Gauge being slow can be caused by think oil finding it hard to get down the pipe to the gauge, mine is slow to react to rev changes until properly hot.
Well its all fun , just to confuse things a little bit more here is a PRO fram thread
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Anyone mentioned the relief valve spring or when was it last changed ?
GL
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Anyone mentioned the relief valve spring or when was it last changed ?
GL
Although this is somewhat out of date, it is still very interesting and useful
http://minimopar.knizefamily.net/oilfilters/german...
http://minimopar.knizefamily.net/oilfilters/german...
Hi Guys, Thanks for all the input so far!
hardtolove thanks for that but I have read through your link & UKkid's , after reading UK's I googled some more & was surprised at how bad Fram's build quality or lack of it ie: cardboard ends etc have just bought a Cooper Fiamm filter from E bay. So when it arrives this week we will see. H?love I have also taken on board your advice re oil relief spring & have one on its way to me as well.
I will change the filter 1st out of curiosity as I must admit that i have used Fram for years & no apparent problem before so it will be interesting to see.
Thanks again will post results later in week or week end .
hardtolove thanks for that but I have read through your link & UKkid's , after reading UK's I googled some more & was surprised at how bad Fram's build quality or lack of it ie: cardboard ends etc have just bought a Cooper Fiamm filter from E bay. So when it arrives this week we will see. H?love I have also taken on board your advice re oil relief spring & have one on its way to me as well.
I will change the filter 1st out of curiosity as I must admit that i have used Fram for years & no apparent problem before so it will be interesting to see.
Thanks again will post results later in week or week end .
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