some one told me 1980's cadillac oil pump would fit a 1980 dodge d150 pick up 225 super 6 - supposed to have 2x volume, same pressure as its coming off v8 engine....if you know anything about this possiblity can you advise what model / pump / part no / any info on replacement????? thanks

Fetman, assuming that you're asking a legitimate question here and not trying to make a funny, let's have some consistency, can we please? Is it a '79 W150 or is it an '80 D150 on which you're experiencing low oil pressure?

That's number one. Number two: If you seriously give any credence to this imaginative notion that a Cadillac oil pump fits a Chrysler engine, you should think very carefully about the wisdom of your touching anything under the hood of any vehicle.

We're here to help, but please put some careful thought into your questions and heed the answers you're given.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Dear SlantSixDan; First of all, there is some discrepancy with the year of the vehicle as the door is stamped 1979(date stamp says 09-79-C) but when the VIN was registered it came up as a 1980.....The side of the truck says it is a 150 Power Wagon but the door says it is a W100 (D150 was a typo, sorry my fault!) So where does that leave us....

I am wits end to try and fix the oil pressure problem and I didn't say that I actually believed that a Cadillac pump would fit a Chrysler engine, I said that someone told me it would and I was looking for some verification of that. I was told by a Master Engine builder from Detroit who works with Chrysler that there was one year in the 80's that they made a pump that was similar to the pump on this vehicle and could possible work...the credentials of this person are impeccable.....

If I was in the automotive industry and knew all about vehicles I wouldn't be asking you for help...I have had the vehicle to a number of Dodge dealer service locations, but due to age they have no idea what to do....

Presently, I am going to pull the pan off the truck and do a visual inspection to try to find cracks in the pickup, inspect the gears etc I have bought a new pump from an autoparts store, but I could only get a standard low volume pump and was looking for different options.

The first contact was made through my son, before the vehicle was pulled into the garage for closer inspection. I got the vehicle from a farmers garage where it had sat for quite some time, and am slowly resurrecting it, we currently use it to plow our lot at work and it has been okay. Just trying to prolong its life, so any worthwhile comments would be appreciated.

Is there a high volume oil pump that would work with this vehicle?

Quite a mystery machine, then. A build date of 9-79 would place it in the 1980 model year. If you post the truck's VIN, we can decode it for you.

The credentials of the guy who told you a Cadillac pump (of any year) fits a Chrysler engine (any size, any year), are hardly impeccable. He's either a few sandwiches short of a picnic (an idiot) or he's pulling your leg (a jerk).

Your question about the availability of a high-volume oil pump was answered ("Yes, but they can cause problems") by Doc in the first thread you started.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

VIN is W14JEAS100636. The pump is a low volume pump which was a rebuild from Cdn Tire - the only pump I could obtain in the Belleville area. Before jumping on the "jerk" let's try to keep this professional. If you are wrong, the egg will be on your face.

The other question that was posted earlier regarding the clearance on the main bearings: 0.0015

If there is any other information that I can supply to you I will be more than happy to do so in a professional manner. Personal slams are not called for.

Best Regards, Mark

Mark,

Doc or Doctor Dodge is our resident oil pump guru and race engine builder. He has upgraded and modified pumps that are available for a very reasonable fee. I would give "Doc" a PM.

Since the bearings are new, how did the timing chain gear look?
Was it replaced? Was it nylon and could any pieces be plugging the pick up?
Did you do the work? is there a way you can find out? Something is very wrong with the oil pickup screen or a galley plug loose or missing to were you would be loosing that much pressure.

I recently did a rebuild do to loosing oil pressure from a new filter that collapsed inside and plugged. The bypass in the filter failed too and starved my engine of oil which wiped out the #1 and #2 rod bearings, etc.... Put on another filter, even though the damage was done and the rods were clanking I got my usual 45 pounds of oil pressure back. It took 70 pounds of pressure before the bypass opened. "That was a "Mighty" brand filter sold at our local Valvoline Oil Servicing Center. Needless to say I hand them the synthetic oil and a Wix filter from now on.
My point is the Slant Six oil pump can produce allot of flow and pressure. You don't need to look at other brands of pumps. Give Doc a PM.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Make: Dodge
Model: W150
Body Style: Conventional Cab with Sweptline box or Hi-Line Wagon (Royal Sportsman)
Gross Vehicle Weight: 6,001 lbs to 8,500 lbs
Engine: 318 standard-duty V8 w/2-barrel carburetor
Year: 1980
Build plant: Warren Truck #1
Wheelbase: 115, 131, 133, 149
Rating: 1/2 Ton
Build Number: 636

Looks like someone swapped in a slant-6, unless that "E" in the fifth digit is actually a "B".

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Hey, it has a brand new steel timing chain and gears (from Napa) but excuse me for my ignorance - you said there was a gallery plug that could be loose or missing - where is plug located so I can check...if you say that the stock pump is more than enough to maintain the engine, you are probably right but before I bought this vehicle, the oil pump had been changed by previous previous owner and that was why it was sitting in yard - no oil pressure and also timing chain was out of motor.

The ownership definitely is an E.

I will pull pan off tomorrow, if there is anything else that I can check or any that info that would be pertinent to this situation I would appreciate it if would let me know. I really appreciate your effort and time.

Best regards, Mark

When you pull the pan pay close attention the the pickup for cracks and hole in it. But mainly look up in it and see if there may be something stopping it up. You meantioned that it has a new timing chain so it is very posisble that the old chain lost its plastic teeth. These teeth can stop the pickup tube up.


As far as the galley plug it is very unlikely for this to be a problem unless the engine has been through a machine shop and completely dissasibled.


If the pickup is not stopped up then it is a good bet that the Camshaft Bearings are warn out and this is where your loosing your pressure. With the mains having .0015 clearance as you stated I expect the rods are good clearance also if they where checked to know this. Most of the time if new bearings where needed when the new bearings are installed it will not take up all the clearance because of crankshaft wear. But if they where check and clearance is .0015 as you say then thats not the problem.


When these engines get this way becuase of the cam bearings there is not much you can do but fix it. If you was to try a HV pump they are bad about putting to much pressure on the gear that drives them and it will break it. The best thing is to fix the cam bearings, and or the stopped up pickup if that is the case and the problem.


Jess

Mark,

Read Doc's post on the "Twiggy build". It has some very good pictures of the oil pump with hardened gear, galley plugs, etc.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

A high volume oil pump shouldn't be necessary under any conditions; all it does is put a little excess stress on the drive gear, and the excess volume it generates goes through the built-in pump bypass valve. I had a high mileage engine with .004 inch clearance on the rod bearings and the main & cam bearings were probably in similar worn condition though I didn't measure them, and replacement standard oil pump, with no oil pressure problems even when hot with 5W-30 oil. Looks like this engine has one of the other possible problems mentioned in people's posts, causing loss of oil pressure.

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1964 Dart 225 1966 Valiant 225
1966 Dart 273 1966 Barracuda 273
1969 Dart 225
'64-170 engine '66-170 engine
(two) 198 crank/rod sets in custom-fitted wooden boxes

wooden motor scooter with hybrid-electric drive

This weekend we pulled the pan..

Found some things out.. First of all.. The oil pick up tube looked like it Came lose in the block.. came over and said hellllo To the crank.. And swung back locking it back in..

The pick up tube had been cracked.. We pulled it off.. and due to its condition.. Had to replace it to.. After all that Work getting it off.. No were up here can get a pump OR a Pickup tube.

So off to the hardware store we went.. Couple of fittings.. and a dodge service manual later..

We got it back up in their.. Inspected the crank from the impact and all was fine..

Pulled the oil pump.. Cleaned it up.. Shimmed the release valve up with two washers.. to start..

measured how many Litres the oil pan held.. 7.2.. Can you say.. .NOT STOCK..

So we closed the second dipstick tube.. Put it all back together.. Put a better oil filter on it (wasn't as long as the one that was on it)

spun it over to prime the system..

Hooked the coil wire up.. Fired up..

Right now were seeing cold High idle pressure at 45-47 psi
And low Cold idle at 25-30psi
High hot idle at 35psi
Low hot idle at 15 psi
While the truck is locked into 4L And in Drive.. Were seeing 7 psi.. A much improved pressure from 3 psi.

Thanks for your help guys.. i think ill stick around..