Re: Mystery oil pressure problem

From: Darrell Ramsell (daram@comcast.net)
Date: Mon Oct 24 2005 - 18:27:00 PDT


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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>>>
>>
>>
>> ===Mil-Veh is a member-supported mailing list===
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>>
>
>
>
> ===Mil-Veh is a member-supported mailing list===
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>



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