neutered
Help needed thanks
Thread Starter
Racer
Joined: Aug 2000
Posts: 339
Likes: 0
From: cambridge UK Cambs
Help needed thanks
Hi.
I just got my 80 k 86 vert back from the spay shop after 4 months ( I know, very long story) and apart from it looking great I seem to have developed a worrying problem.
before it went in the oil pressure was 70 cold and about 60 at 2000 rpm (200 f) and around 45 @ tick over, Its now 51 cold and varies from about 45 to 50 driving and 35 tick over hot.
I have not done any great mileage in it yet as I was trying to figure what is going on? When I first got the car, 4 years ago the oil pressure would be a bit erratic but after a couple of oil changes and rad cleans etc, it sorted itself out, I am not sure if what I am seeing is just an electrical gremlin or if its possible the pressure release valve in the pump is stuck open?
How hard is it to change the pump with the engine in the car ?
I will do an oils change and flush this week end and see what happens, but this is a bit of a kicking after being so pleased to get it back.
All ideas gratefully received.
PS I always use Mobile 1 0-40 and change it once a year - about 3 to 4 K
I just got my 80 k 86 vert back from the spay shop after 4 months ( I know, very long story) and apart from it looking great I seem to have developed a worrying problem.
before it went in the oil pressure was 70 cold and about 60 at 2000 rpm (200 f) and around 45 @ tick over, Its now 51 cold and varies from about 45 to 50 driving and 35 tick over hot.
I have not done any great mileage in it yet as I was trying to figure what is going on? When I first got the car, 4 years ago the oil pressure would be a bit erratic but after a couple of oil changes and rad cleans etc, it sorted itself out, I am not sure if what I am seeing is just an electrical gremlin or if its possible the pressure release valve in the pump is stuck open?
How hard is it to change the pump with the engine in the car ?
I will do an oils change and flush this week end and see what happens, but this is a bit of a kicking after being so pleased to get it back.
All ideas gratefully received.
PS I always use Mobile 1 0-40 and change it once a year - about 3 to 4 K
Thread Starter
Racer
Joined: Aug 2000
Posts: 339
Likes: 0
From: cambridge UK Cambs
Originally Posted by The Hobbit
Hi.
I just got my 80 k 86 vert back from the spay shop after 4 months ( I know, very long story) and apart from it looking great I seem to have developed a worrying problem.
before it went in the oil pressure was 70 cold and about 60 at 2000 rpm (200 f) and around 45 @ tick over, Its now 51 cold and varies from about 45 to 50 driving and 35 tick over hot.
I have not done any great mileage in it yet as I was trying to figure what is going on? When I first got the car, 4 years ago the oil pressure would be a bit erratic but after a couple of oil changes and rad cleans etc, it sorted itself out, I am not sure if what I am seeing is just an electrical gremlin or if its possible the pressure release valve in the pump is stuck open?
How hard is it to change the pump with the engine in the car ?
I will do an oils change and flush this week end and see what happens, but this is a bit of a kicking after being so pleased to get it back.
All ideas gratefully received.
PS I always use Mobile 1 0-40 and change it once a year - about 3 to 4 K
I just got my 80 k 86 vert back from the spay shop after 4 months ( I know, very long story) and apart from it looking great I seem to have developed a worrying problem.
before it went in the oil pressure was 70 cold and about 60 at 2000 rpm (200 f) and around 45 @ tick over, Its now 51 cold and varies from about 45 to 50 driving and 35 tick over hot.
I have not done any great mileage in it yet as I was trying to figure what is going on? When I first got the car, 4 years ago the oil pressure would be a bit erratic but after a couple of oil changes and rad cleans etc, it sorted itself out, I am not sure if what I am seeing is just an electrical gremlin or if its possible the pressure release valve in the pump is stuck open?
How hard is it to change the pump with the engine in the car ?
I will do an oils change and flush this week end and see what happens, but this is a bit of a kicking after being so pleased to get it back.
All ideas gratefully received.
PS I always use Mobile 1 0-40 and change it once a year - about 3 to 4 K
appreciate any ideas
Thanks
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by The Hobbit
Hi.
I just got my 80 k 86 vert back from the spay shop after 4 months
I just got my 80 k 86 vert back from the spay shop after 4 months
Originally Posted by The Hobbit
before it went in the oil pressure was 70 cold and about 60 at 2000 rpm (200 f) and around 45 @ tick over, Its now 51 cold and varies from about 45 to 50 driving and 35 tick over hot.
Originally Posted by The Hobbit
...or if its possible the pressure release valve in the pump is stuck open?
If you have any doubts or concerns over your oil pressure, the first step is to recheck it with a known good mechanical oil pressure gauge.
Changing to a more conventional 10W-30 oil may also help to drop the pressure into the "normal" range.
RACE ON!!!
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
oil pressure senders are themselves quite erratic....intending to use an oil press sender for another project,i set up a bench test to check accuracy--after trying four different manufacturers, i shelved the project due to inconsistent output of the senders...in other words,don't worry about it,as long as you have some pressure.
using 10w-40 motor oil (ask me how i know) will cause your engine to burn oil, as i remember the owners manual recommends 10w-30.
motor oil is hydroscopic and absorbs moisture from the air...unless you are in a very dry climate, oil should be changed every 6 months
using 10w-40 motor oil (ask me how i know) will cause your engine to burn oil, as i remember the owners manual recommends 10w-30.
motor oil is hydroscopic and absorbs moisture from the air...unless you are in a very dry climate, oil should be changed every 6 months
Thread Starter
Racer
Joined: Aug 2000
Posts: 339
Likes: 0
From: cambridge UK Cambs
Originally Posted by CFI-EFI
You had your Corvette neutered???
Your oil pressure was WAAAAY too high, but it sounds like it is getting better. Maybe more surgery would help.
If the oil pressure RELIEF valve were stuck open, you would have zero oil pressure.
If you have any doubts or concerns over your oil pressure, the first step is to recheck it with a known good mechanical oil pressure gauge.
Changing to a more conventional 10W-30 oil may also help to drop the pressure into the "normal" range.
RACE ON!!!
Your oil pressure was WAAAAY too high, but it sounds like it is getting better. Maybe more surgery would help.
If the oil pressure RELIEF valve were stuck open, you would have zero oil pressure.
If you have any doubts or concerns over your oil pressure, the first step is to recheck it with a known good mechanical oil pressure gauge.
Changing to a more conventional 10W-30 oil may also help to drop the pressure into the "normal" range.
RACE ON!!!
I spoke to a mobile oil technician before switching to 0-40 and he's advise was that the 40 would be fine in this age of engine, and as you can only get 0-40 or 15-50 in the uk I went with that, note: M1 is about 48 pound for 5 lts i.e. nearly $90 a fill, so I looked into it quite carefully before changing.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by The Hobbit
What would you consider to be normal oil pressure in a sbc, I know that the min is normally quoted as 10 psi / 1000 rpm .
RACE ON!!!
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Joe Kucinski
- 1986 Original Owner -
Joined: Apr 1999
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From: North Yorkshire, England
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Bazza,
How you been. Moved back up North now. If you need a new sender to test, I've got a couple in stock.
You going to the Nats this year? At Huntingdon Racecourse now.
How you been. Moved back up North now. If you need a new sender to test, I've got a couple in stock.
You going to the Nats this year? At Huntingdon Racecourse now.
Thread Starter
Racer
Joined: Aug 2000
Posts: 339
Likes: 0
From: cambridge UK Cambs
Originally Posted by Ray Quayle
Bazza,
How you been. Moved back up North now. If you need a new sender to test, I've got a couple in stock.
You going to the Nats this year? At Huntingdon Racecourse now.
How you been. Moved back up North now. If you need a new sender to test, I've got a couple in stock.
You going to the Nats this year? At Huntingdon Racecourse now.
If its not a problem I will take you up on your offer, what pressure does your 86 run?
Hope all is well
Barry
- 1986 Original Owner -
Joined: Apr 1999
Posts: 3,193
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From: North Yorkshire, England
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I think the CCCUK just got a much better deal at Huntingdon. Their share of the gate is much higher, and you can camp on site. The Novatel had seen better days and there were many complaints about the food. The Marriott should be much better. Time will tell. Also better for me, with Alconbury being right there, I have some facilities handy.
I run no lower than 30 psi at idle at 225°F and it has been thaqt way since I picked it up in December '86. email me your snailmail address and I'll post you the sender. Unless you want to wait until the Nats.
I run no lower than 30 psi at idle at 225°F and it has been thaqt way since I picked it up in December '86. email me your snailmail address and I'll post you the sender. Unless you want to wait until the Nats.