Hello all, My oil pressure light comes on when traveling the interstate at 65-70mph. When going 0-60mph I have no problems. I figure I need to do an oil pressure test. Also, I just got it. It has 135k miles. It was in a wreck within the past year and had sat for about 2 months. I don't have the service records. Should I find the last service date/schedule(ex. 120k service) and go down the list? Thanks, Donnie

 

Although different vehicle (Dodge Ram Pickip 1998) My dads Oil gague would read 0 after it had started, he replaced the oil pump and sending sensor unit. No more problems. I would recommend stop using your vehicle ASAP cause if that Oil pump goes out you going to be looking at a whole lot more then just that. With that many miles i would be safe than sorry and just replace the oil pump. Just My 2 cents

I have a 97 Disco 1 with 116,000 miles on it, and i will probally be replacing the oil pump in about 6months or so (I put on 2k to 4k miles per month)

 

Thanks OxyCoRover. In response, I've talked to a guy at www.braddysbritish.com. He's a Land Rover specialist in Wake Forest. He said he thought that the connecting rod bearings needed to be replaced. Oh yeah, and he also said it would cost about $800. I know an oil pump would be cheaper. He said it's rarely the oil pump. What do you think? Man I wish Disco Mike would see my post! lol.
Thanks, Donnie

 

You need to get your oil pressure tested ASAP. Do you get any internal engine noise, has anyone checked your pressure switch, that are known to fail?
How mechanical are you, if it were the rod bearings, you might want to consider replacing them yourself.

 

Like Mike said, test your pressure. Another thing ti think about is oil ports getting clogged and trapping oil in the heads. Basically running out of oil. Make sure she is full, and stay off the highway until you find out...

 

I agree with discoguy, your return oil ports are clogged. Switch to a full synthetic oil, it will clean as you drive.
At higher rpm the oil pump is pumping oil into the upper parts of the engine faster than it can drain back into the sump thus running the oil pump dry.
You can test this by driving at slower speeds with the transmission in a lower gear and getting the rpm up to highway speeds.
If your engine is that sludged up I wouldnt do a engine flush, all that crap will break loose and could cause more harm. I think that a gradual cleaning would be best. Just my opinion though.
Yes, after you have the oil pressure tested.

 

agreed, but after the oil pressure is tested.....

 

The only noise I've heard was a tapping that corresponded to the engine at the time the pressure light was on. I will check the switch and check the oil pressure. If it is rod bearings, I have a mechanic buddy who said it would be no problem... thank God!

 

The first thing we did was check the oil. It was maybe 1/2 qt. low if any and looked pretty clean. No highways for me until this things fixed. Thanks to all for the help. Spike555, thanks for the explanation.

 

Either way, you still need to do a engine flush and waiting on the synthetic to slowly clean the engine will in fact kill the engine cause it takes months of driving to even begin to clean the engine.
Get it tested and then do an ATF flush right away, pulling the pan afterwards to clean and inspect.
If your engine is that dirty, you will probably need to use a 1 quart Gunk engine flush on your next 3 04 4 oil changes to keep cutting the build up.