Help! No oil pressure!

[erniecarpet@...]

Ryan, previous owner added an oil gauge right on the engine down low. Hard to see that at 60 mph, though.

Ernie Ekberg
83PT40
Weatherford, Texas

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[Ryan Wright]

Help! I'm getting ready to leave for the weekend... supposed to be on
the road in 2 - 3 hours and I have no oil pressure in the 8V92.

I checked the oil. It's full. So either the gauge or the oil pump...
need to know how to figure out which and troubleshoot this real quick.
Help!!

-Ryan
'86 PT-40 8V92

[Ryan Wright]

Quick follow up, by "no oil pressure" I mean the gauge is at 0. Gauge
does "twitch" to 0 when I turn the ignition on, so it's getting
power... engine is cold. I only ran it ~30 seconds and shut back down
when oil pressure didn't come up. Gave it some throttle, too, and no
movement on the gauge... I'd be used to seeing ~5psi at least when I
first start, if memory recalls.

-Ryan

On Fri, Oct 10, 2008 at 1:57 PM, Ryan Wright wrote:
> Help! I'm getting ready to leave for the weekend... supposed to be on
> the road in 2 - 3 hours and I have no oil pressure in the 8V92.
>
> I checked the oil. It's full. So either the gauge or the oil pump...
> need to know how to figure out which and troubleshoot this real quick.
> Help!!
>
> -Ryan
> '86 PT-40 8V92
>

[erniecarpet@...]

Ryan, how does your engine sound? Anything to your ears abnormal? I wish I had the engine noise and pitch that my FC had so that I could hear how she is running.

Ernie Ekberg
83PT40
Weatherford, Texas

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[mbulriss]

Ryan,

Do you have a oil pressure guage in the engine compartment by the rear
starter switch? What does that one say?

Mike Bulriss
1991 WB40 "Texas Minivan"
San Antonio, TX




--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> Quick follow up, by "no oil pressure" I mean the gauge is at 0. Gauge
> does "twitch" to 0 when I turn the ignition on, so it's getting
> power... engine is cold. I only ran it ~30 seconds and shut back down
> when oil pressure didn't come up. Gave it some throttle, too, and no
> movement on the gauge... I'd be used to seeing ~5psi at least when I
> first start, if memory recalls.
>
> -Ryan
>
> On Fri, Oct 10, 2008 at 1:57 PM, Ryan Wright wrote:
> > Help! I'm getting ready to leave for the weekend... supposed to be on
> > the road in 2 - 3 hours and I have no oil pressure in the 8V92.
> >
> > I checked the oil. It's full. So either the gauge or the oil pump...
> > need to know how to figure out which and troubleshoot this real quick.
> > Help!!
> >
> > -Ryan
> > '86 PT-40 8V92
> >
>

[Pete Masterson]

First, check all ground straps, etc. Bad ground is the most common
problem for erratic gauges and other ills.

How cold is it? Run the engine pre-heat (if you have it) for a couple
of hours -- or run the engine heater overnight.

Pete Masterson
'95 Blue Bird Wanderlodge WBDA 42
aeonix1@...
On the road near Lancaster, PA



On Oct 10, 2008, at 5:02 PM, Ryan Wright wrote:

> Quick follow up, by "no oil pressure" I mean the gauge is at 0. Gauge
> does "twitch" to 0 when I turn the ignition on, so it's getting
> power... engine is cold. I only ran it ~30 seconds and shut back down
> when oil pressure didn't come up. Gave it some throttle, too, and no
> movement on the gauge... I'd be used to seeing ~5psi at least when I
> first start, if memory recalls.
>
> -Ryan
>
> On Fri, Oct 10, 2008 at 1:57 PM, Ryan Wright
> wrote:
>> Help! I'm getting ready to leave for the weekend... supposed to be on
>> the road in 2 - 3 hours and I have no oil pressure in the 8V92.
>>
>> I checked the oil. It's full. So either the gauge or the oil pump...
>> need to know how to figure out which and troubleshoot this real
>> quick.
>> Help!!
>>
>> -Ryan
>> '86 PT-40 8V92
>>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

[Ryan Wright]

Hi Mike,

Nope, no gauge in the engine compartment, unfortunately.

Pete: It's cold-cold... I turned the engine pre-heat on about half an
hour ago, so we'll see if that changes anything. She did start a bit
hard due to the cold. Maybe that's just it, oil is too cold to
register much pressure? I'll check the ground straps too.

Without a working oil pressure gauge, is there any way to verify the
oil pump is doing it's job? The engine sounded just fine when I had it
running...

-Ryan

On Fri, Oct 10, 2008 at 2:39 PM, mbulriss <mbulriss@...> wrote:
> Ryan,
>
> Do you have a oil pressure guage in the engine compartment by the rear
> starter switch? What does that one say?

[Ryan Wright]

On Fri, Oct 10, 2008 at 3:34 PM, wrote:
> Ryan, previous owner added an oil gauge right on the engine down low. Hard
> to see that at 60 mph, though.

Nothing on mine... I remember seeing a thread awhile back where
someone added three gauges in the back, oil pressure, temperature and
something else. I'd love more details on how that was done, would like
to do it myself one day.

However, I'm still at home debating whether or not to leave now. Oil
pressure gauge still shows 0. The dipstick gets oil way up above the F
line with the engine running, though, so I'm thinking the oil pump
should be working fine? Oil level is just a sliver below F when not
running.

Where is the oil pressure sending unit on my coach? I'd like to take
it off, clean it, put it back on, check the connections, etc... Also
if there is a foolproof way to know the oil pump is, indeed, working,
I could use that info too. This is a short weekend trip so if I can be
sure the oil pump is running, I'll leave and fix the sending unit when
I get home...

-Ryan
'86 PT-40 8V92

[bbwlwb88]

Ryan, I had the same problem in my 88 pusher when I was on the road in
Oklahoma a few years ago. I noticed the oil pressure was fluctuating
and dropping but the oil temperature remained normal. I pulled off the
road and waited a few minutes and then checked the oil level and found
it was also normal. I decided to drive on to Tulsa and closely watched
the oil temperature which stayed in the normal range. The Detroit
dealer found the oil sending unit had failed. Luckily they had a
rreplacement and the bill was less than $100.

Royal Washburn
97 43'WLWB



--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> Help! I'm getting ready to leave for the weekend... supposed to be on
> the road in 2 - 3 hours and I have no oil pressure in the 8V92.
>
> I checked the oil. It's full. So either the gauge or the oil pump...
> need to know how to figure out which and troubleshoot this real quick.
> Help!!
>
> -Ryan
> '86 PT-40 8V92
>

[Gregory OConnor]

could be that the op gauge works. the screen is clogged on the pickup
in the pan or the oil pump is screwed. you can look for a signal(?) to
the gauge to see if the gauge is getting a command from the sender. You
can take off a block oil plug or the oil line to the compressor or
turbo to see if it pumps oil.

The sender at rest, should read around 240 ohms at no psi and go down
to the 30 ohms readings at 90. you can check at the sender then at the
removed wires from the gauge.

Greg94Ca