For what it's worth. On my original engine with close to 140,000 miles I get
various readings. Most of the time while driving the gage will show 40PSI.
However, when I've been running for a couple of hours it will slowly drop to
around 25PSI. That used to bother me about 10,000 miles ago, but now I just
accept it. It idles at around 10PSI.
Now there will be those that will say that I'm headed to the overhaul shop with
numbers like those. Well maybe, but I have had the Custom Instrument Panel gage
in the coach for the past 15,000 miles and that is what I've been seeing on the
gage since I installed the panel.
Also, I use about 1 quart of oil betwen oil changes and it seems to be running
just fine.
Richard Waters
1976 Palm Beach
Troy, MI
> This last Sunday, after a year of doing the GMC crawl under our coach, and
> replacing fluids, hoses, exhaust, etc., we were finally able to drive our
> coach. We would like to thank Emery and Patrick for the thermostats - water
> temp was great.
> However...we are not sure about our oil pressure. We have installed a remote
> oil filter and an auxiliary oil cooler. When the engine is warm and idling,
> the oil pressure seems excessively low. When the coach is motivating it
> holds at about 19 psi. The POs replaced the engine on their trip home from
> purchasing the coach and it has 3000 miles on it. We are using Mobil 1
> 10-30wt oil in it.
> What should the oil pressure be at idle, minimum? Has anyone else that might
> have installed a large oil cooler experience this problem? The POs who did
> not run this cooler, felt the pressure was low during their time driving the
> coach, so we are not sure if this is normal, or if it is something we did, or
> it is a problem with the engine.
> Also, has anyone dropped the oil pan without removing the trans/diff. unit?
>
> Thanks in advance for all your assistance,
>
> Bert and Fay
> 76 Glenbrook
>
> PS Wish we knew someone was looking for the OEM oil adapter as ours is just
> sitting on the spares shelf now.
various readings. Most of the time while driving the gage will show 40PSI.
However, when I've been running for a couple of hours it will slowly drop to
around 25PSI. That used to bother me about 10,000 miles ago, but now I just
accept it. It idles at around 10PSI.
Now there will be those that will say that I'm headed to the overhaul shop with
numbers like those. Well maybe, but I have had the Custom Instrument Panel gage
in the coach for the past 15,000 miles and that is what I've been seeing on the
gage since I installed the panel.
Also, I use about 1 quart of oil betwen oil changes and it seems to be running
just fine.
Richard Waters
1976 Palm Beach
Troy, MI
> This last Sunday, after a year of doing the GMC crawl under our coach, and
> replacing fluids, hoses, exhaust, etc., we were finally able to drive our
> coach. We would like to thank Emery and Patrick for the thermostats - water
> temp was great.
> However...we are not sure about our oil pressure. We have installed a remote
> oil filter and an auxiliary oil cooler. When the engine is warm and idling,
> the oil pressure seems excessively low. When the coach is motivating it
> holds at about 19 psi. The POs replaced the engine on their trip home from
> purchasing the coach and it has 3000 miles on it. We are using Mobil 1
> 10-30wt oil in it.
> What should the oil pressure be at idle, minimum? Has anyone else that might
> have installed a large oil cooler experience this problem? The POs who did
> not run this cooler, felt the pressure was low during their time driving the
> coach, so we are not sure if this is normal, or if it is something we did, or
> it is a problem with the engine.
> Also, has anyone dropped the oil pan without removing the trans/diff. unit?
>
> Thanks in advance for all your assistance,
>
> Bert and Fay
> 76 Glenbrook
>
> PS Wish we knew someone was looking for the OEM oil adapter as ours is just
> sitting on the spares shelf now.
