Re: Mystery oil pressure problem

From: Darrell Ramsell (daram@comcast.net)
Date: Mon Oct 24 2005 - 23:31:16 PDT


I forgot to add that I live about 40 "miles" east of San Francisco.

I also forgot to ad that my engine is a new rebuilt with less that 10,000.
I'm not sure if that make a difference or not but I thought I would mention
it. I've been told that my oil pressure runs a little on the high side. I
wonder if this is because the engine is new so to speak.

Darrell

----- Original Message -----
From: "Darrell Ramsell" <daram@comcast.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Monday, October 24, 2005 6:27 PM
Subject: Re: [MV] Mystery oil pressure problem

>I forgot to add that I live about 40 east of San Francisco.
>
> Darrell
>
> ----- Original Message -----
> From: "Darrell Ramsell" <daram@comcast.net>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Monday, October 24, 2005 4:51 PM
> Subject: Re: [MV] Mystery oil pressure problem
>
>
>> Fred
>>
>> From the information I gathered it appears that my oil pressure change
>> was because I was pushing the engine for a long period of time. This is
>> the first time I towed my M-101 trailer up over the Sierra Mountains on
>> I-80 (I was going from Sacramento to Reno). From Auburn to Truckee it's
>> basically 50 miles all up hill. I think now the combination of a long up
>> hill climb and trying to keep the same speed I normally drive at when I
>> go over the Sierra's was making the engine run at a constant hotter
>> temperature than normal. I think this cause the oil to thin out or start
>> to break down a little or both which resulted in a drop in my oil
>> pressure. When I drove back 2 days later over the Sierras I took it easy
>> on the engine and I had no problems with my oil pressure. In fact it was
>> reading normal the whole way. Also, going from Reno to Sacramento it's
>> only a 20 mile climb up hill but a little steeper. So I don't know if
>> the shorter climb, driving slower or a combination of both made the
>> difference.
>>
>> Anyway, I've only had my HMMWV for a little over a year now but I'm still
>> learning about it capabilities and limitation. I also make my HMMWV work
>> for a living too. I drive it regularly. I've towed as much a 6,500 lb
>> with it (3,000 in the M-101 & 2,000 in the HMMWV & 1,500 in trailer
>> weight). I've driven it to LA once, Reno 3 times and Truckee 3 times.
>> I've had it at altitudes from sea level to 7,800 feet and driven it in
>> the snow in the mountains to 110' heat in the desert. There are a lot of
>> stories in this but I'll share that at a later time.
>>
>> Darrell
>>
>>
>>
>> ----- Original Message -----
>> From: "Fred Martin" <mung@in-touch.net>
>> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>> Sent: Monday, October 24, 2005 1:18 PM
>> Subject: Re: [MV] Mystery oil pressure problem
>>
>>
>>> Sorry about answering a question with another but is there such a thing
>>> as a gage that isn't altitude compensated? Seems the problem only showed
>>> up at altitude. Fred
>>>
>>> Darrell Ramsell wrote:
>>>
>>>> Mystery
>>>>
>>>> Gents
>>>>
>>>> I drove my HMMWV this last weekend from the San Francisco Bay Area to
>>>> Reno and back. On my trip I experience an unusual oil pressure problem
>>>> that I hope some of you Diesel Engine Experts can help me with.
>>>>
>>>> Friday night I drove out to Reno. As I was crossing the Sierra
>>>> Mountains at about 4,500 altitude my oil pressure dropped about 15 psi.
>>>> Normally when I drive it's at 60 psi & 30 psi when idle. So now it was
>>>> at 45 psi. I stopped at a Rest Area and check for leaks and the oil and
>>>> everything was fine. I also tested the engine. When I stepped on the
>>>> gas the oil pressure went up then dropped when I let of the gas. I
>>>> asked a trucker at the stop for some advice. After he check things out
>>>> he said I should be okay. As I continued the oil pressure reading
>>>> dropped to 30 psi but the engine seemed to be running fine. By this
>>>> time I had reached the summit and since the rest was down hill I
>>>> decided to continue on. As I started going down hill the oil pressure
>>>> went up to about 40 psi and stayed there. I finally made it to my
>>>> destination with no problems.
>>>>
>>>> I discussed the problem with some friends in Reno and they felt I
>>>> should be able to drive home. So I drove back to the Bay Area today
>>>> and my oil pressure was normal all the way home (60 psi driving & 30
>>>> psi idle). In fact it ran just fine.
>>>>
>>>> The only other thing I noticed was that there appeared to be some oil
>>>> residue around where the exhaust manifold attached to the block but it
>>>> was just in one spot and I could tell it this was fresh or not.
>>>>
>>>> So my thoughts now is that perhaps I might had a fluke with the oil
>>>> pressure sender unit or gage is going bad. But the oil residue around
>>>> one of the exhaust manifold and engine block concerns me. Maybe the
>>>> gasket has a small leak or it's something else and if it does I don't
>>>> know if it's related. So if anyone can help me solve my dilemma I'd
>>>> appreciate it.
>>>>
>>>> Thanks
>>>>
>>>> Darrell
>>>>
>>>>
>>>> ----- Original Message ----- From: "jhooah" <jhooah@mindspring.com>
>>>> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>>>> Sent: Sunday, October 16, 2005 12:14 PM
>>>> Subject: [MV] TP filter, 'secret" Fuel ingredients and AN/TAS-4 parts
>>>>
>>>>
>>>>>
>>>>> How about using the Toilet paper filters for filtering the WVO as a
>>>>> pre-filter, then burn it in the Deuce... Should save $$$ on the
>>>>> primary filters.
>>>>>
>>>>> The "Secret" ingredient that company sells is likely the pre-mixed Lye
>>>>> and methanol so you can merely add it to a vat and do the rest of the
>>>>> work like Bjorn has done in individual steps.
>>>>>
>>>>>
>>>>> Funny thing happened following the Mil Show the other day, the local
>>>>> FBI called up to ask if I knew anything about a guy driving an
>>>>> Anti-Tank missile jeep around my area during a rain storm last
>>>>> Saturday... I said "Sure, it was me"...... Seems someone called in to
>>>>> complain about my demilled TOW jeep driving to the show... Really
>>>>> something a terrorist would drive around in when they are trying to
>>>>> sneak up on you eh?
>>>>>
>>>>> I'm seeking AN/TAS-4 Thermal Night sight guts... I want to fix the
>>>>> Thermal for the kids to see through....(don't want any other TOW
>>>>> electronics, not going for operational system here, just the thermal
>>>>> parts...)
>>>>> Could buy a Soviet version,maybe Iraqi, but that's not "restoring it"
>>>>> and defeats my intended purpose. if you haven't looked through a
>>>>> Thermal, do so at a Military show one day...Neat, just like "Cops"
>>>>> chasing crooks with helicopter stuff.
>>>>>
>>>>> Regards
>>>>> W Winget
>>>>> Virginia
>>>>> www.vmpa.us/aw
>>>>>
>>>>> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>>>>>
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>>>>>
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
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>>
>>
>>
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>>
>
>
>
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