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Car Forum / Jeep / March 2007Low oil pressure in Wagoneer- easy fix or no?
Hi all, am considering the purchase of a '79 Wagoneer, 360/2bbl/Turbo 400. Haven't looked at it yet but the owner says that one of the "issues" with it is low indicated oil pressure when hot. sounds like he hasn't put a calibrated gauge on it yet but he said that a common problem had something to do with a timing cover and that there was a kit available for cheap to fix, or it might be as simple as a bad gauge sender. Should I even bother going to look at this vehicle, or is this a deal killer? Owner says there is NO lifter clatter at any time. thanks, nate > Hi all, > [quoted text clipped - 10 lines] > > nate If it is priced like it has no engine in it, then it might be a deal. On an engine that old, I would suspect the low oil pressure is due to worn out parts like crank and cam bearings. Putting a new oil pump in it (under the timing cover) might bring it up a little, but that is just treating the symptoms. If I was going to go check that, I would bring a compression tester and a mechanical plug in oil gauge to see what is really going on. My CJ7 originally came with a bad engine because of blowby and bad idle even with a new carb. I checked the compression there in the driveway and it was like new so I pinched the charcoal canister line and the idle behaved long enough for me to think it was a runner with a little tinkering... It was. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) What eliminates the 360" from the Civilian Jeeps and may be the same on the Wagoneers are weak motor mounts combined usually with a missing spring rubber bump stop that allows the oil pump and it's relief valve to smash into the differential, jamming it in whatever position it was in, wide open for cold, resulting low hot pressure, or closed if hot, then usually blowing the oil filter off. God Bless America, Bill 0|||||||0 mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > Hi all, > [quoted text clipped - 10 lines] > > nate  SignaturePosted via a free Usenet account from http://www.teranews.com So let's say that it needs an oil pump and timing cover. Is that a fun, easy weekend project or a royal PITA? nate > What eliminates the 360" from the Civilian Jeeps and may be the same on > the Wagoneers are weak motor mounts combined usually with a missing spring [quoted text clipped - 19 lines] >> >>nate Signaturereplace "roosters" with "cox" to reply. http://members.cox.net/njnagel That depends on point of view. Earle > So let's say that it needs an oil pump and timing cover. Is that a fun, > easy weekend project or a royal PITA? [quoted text clipped - 24 lines] > >> > >>nate It may be easy, if you can get away with just replacing the dented part: http://www.4wheelparts.com/jeep-parts-details.aspx?pid=JEE3226242 and if you can get the relief piston out: http://www.billhughes.com/temp/AMCoilPumpkit.jpg And of course replace the motor mounts. God Bless America, Bill 0|||||||0 mailto:LWHughes3rd@aol.com > So let's say that it needs an oil pump and timing cover. Is that a fun, > easy weekend project or a royal PITA? > > nate SignaturePosted via a free Usenet account from http://www.teranews.com This would be visible from the outside wouldn't it? That would mean he could easily determine if the low oil pressure is from damage or just wear... Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) > It may be easy, if you can get away with just replacing the dented part: > http://www.4wheelparts.com/jeep-parts-details.aspx?pid=JEE3226242 and if you [quoted text clipped - 8 lines] >> >> nate Hi Mike, I doesn't take much of a hit to jam the piston. You may not be able to see it. But a thirty second test would to remove that plug, spring and see if you can get the piston out. Out in the desert I drilled a hole in the other end and took a nail and beat it back so a friend could get back home before the oil filter blew off, again. Of course plugging that hole with a screw. God Bless America, Bill 0|||||||0 mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > This would be visible from the outside wouldn't it? > [quoted text clipped - 7 lines] > Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 > (More Off Road album links at bottom of the view page) SignaturePosted via a free Usenet account from http://www.teranews.com If you are ready to buy the Jeep, invest just a little money first. Purchase a new Oil Filter and enough Oil to do a change. Surely the owner would not object to that? Even if you decide against the Jeep, he gets the oil changed. Get at least 10-40, but a friend with a 79 Jeep truck swears his works best with 15w40 Chevron Delo. Install your temporary mechanical gauge, run the truck until it gets warm and check the pressure. Change the oil and filter, run it until it gets warm and compare the oil pressure. If the poor guy has been getting it "serviced" at an oil change place, they most likely dumped in the generic 10w30 or even 5w30 like it was a late model. Good Luck, Bruceie |
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