Wd 45 Diesel ?
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Topic: Wd 45 Diesel ?
Posted By: cwhit
Subject: Wd 45 Diesel ?
Date Posted: 17 Jul 2012 at 6:02pm
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Bought at an auction a 56 WD 45 diesel. It had a fuel issue that I,ve fixed and now starts and runs sweet. My problem now is the oil pressure. When I first start it up,( new 15-40 oil GOOD filters and yes it still has both stems ) my oil pressure is around 15 lbs. After it warms up it will drop to about nothing. Tighten up the pressure relief spring and can get it to about 22 cold and 4 hot. My question. Does the buda get its oil pressure from the crank, or the cam like the 226 ?
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Replies:
Posted By: Orange Blood
Date Posted: 17 Jul 2012 at 8:07pm
The oil pump is driven off the cam, if that's what you are asking. If you are asking about worn bearings, mostly cam, but if the crank bearings are loose, that will also allow the pressure to drop.
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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7
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Posted By: cwhit
Date Posted: 17 Jul 2012 at 8:25pm
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I guess I should have asked if I can just put rods and mains in from the bottom for now or should I go deeper and tear it down? What would you guys do?
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Posted By: Orange Blood
Date Posted: 18 Jul 2012 at 6:23am
Well here is the deal. These engines typically are a money pit, the deeper you go, the more it costs. This is not always the case, but often, just ask anyone on here who has overhauled on of these gals. Your idea is worth a try, I think I would start by plastigauging them before all the work to take them apart. If they are in spec you have other problems somewhere. I speculate that if they are loose, then so are the cam bearings, and the oil pump is week as well, because of all the material floating around the engine, or the hours on her, affect pretty much all parts the same. I think dropping the pan is a good option, just to have a look around. The other thing I would do before a tear down, is double check what you are seeing with a quality pressure gauge. A $100.00 test gauge set now, could save you spending thousands, or it just might confirm what you are seeing, but seems like a small price to pay to know for sure.
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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7
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Posted By: mattb
Date Posted: 18 Jul 2012 at 7:47am
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The cam isnt pressure fed on a diesel its gravity fed. So that wouldnt be where ur losing oilpressure. First thing id do is try a good guage seen several of them go bad.
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Posted By: Don(MI)
Date Posted: 18 Jul 2012 at 7:56am
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Had the same problem with a D262 engine also, same thing. After a years years of on off again working on it, and taking it to someone else, this is what we found.
The previous owner, replaced the cam bearings that were worn, but in doing this, PUT THE WRONG SIZE IN. They were oversized, but too big. Thus, higher oil pressure when starting, and falling off a cliff once the oil got warm.
Make sure you plasti-gauge your cam bearings!
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Galatians 5:22-24
"I got a pig at home in a pen and corn to feed him on, All I need is a pretty little girl to feed him when I'm gone!"
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Posted By: Bryan
Date Posted: 18 Jul 2012 at 10:29am
Chuck, tear it down and put the 262 crank and pistons in it. Then put it on the track with your 45 gas. You know you want to. LOL. We need some more ORANGE in the class. I'm trying to get the d17 diesel ready, but I think I'm going to run out of time.
Good luck, Bryan
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Posted By: Brian Jasper co. Ia
Date Posted: 18 Jul 2012 at 12:13pm
Cam bearings have absolutely no effects on oil pressure on the Buda 230 and the 262 later produced after the A-C acquisition. The cam bearings are not pressure lubed and depend solely on the oil draining off the rockers from the head for lubrication. Your only options for low oil pressure are worn main or rod bearings, worn oil pump, weak/broken oil pressure bypass spring. Since this engine has the bypass style oil filters, it may not run a great deal of oil pressure. Best bet would be look in the service manual and see what it's supposed to be. I don't see why you couldn't slip new bearings in it from below if needed. Probably the hardest part of the job would be oil pan R&R.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Posted By: Don(MI)
Date Posted: 18 Jul 2012 at 12:43pm
Brian is right. Wow, my mind slipped!!! Our mains were bad, not the cams like I mistakenly said. Thanks Brian!
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Galatians 5:22-24
"I got a pig at home in a pen and corn to feed him on, All I need is a pretty little girl to feed him when I'm gone!"
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Posted By: cwhit
Date Posted: 18 Jul 2012 at 5:15pm
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Thanks guys. Yes I did go to a good shop and borrowed a quality guage to check the oil pressure so I knew where I stood. I also have the service manual and I know they can be a money pit. But this old girl is pretty sweet and will be light duty only. PS. NO Bryan, this one stays stock..... lol
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