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1999 Mounty 5.0 aka My Great Bad Idea




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Right. So the engine isn't making enough pressure past 4500. Realistically, I don't drive it at higher RPMs than that though.
 






I Just now started my '96.5 MM with 5.0. The engine has 256k plus miles on it. It is cold no warmer than 50F and with 10W40 oil it has a steady 50 pounds of oil pressure. Unable to get a warm reading at this time. I ran the engine for 5 minutes.
ADDED: In my climate, this winter I'm going to run 10W40 then when summer hits, switch to 20W50 in mine.
 






That's not too much higher than mine with 10W-40. Sounds like we're in the same ballpark, my engine is probably just more worn than yours.
 


















A bunch of 5.0s are like a bag of apples. They may look the same but not identical. we are using different oil pressure gauges too.
 






Cold idle with 10W-40 was about the same as with 5W-30: 45 psi or so.

Once up to temp, I have about 20 psi at idle. It climbs steadily through the 2000, 3000, 4000, rpm range, but plateaus at about 44 psi by 4500 and holds there (or maybe even drops slightly) towards 5000.

My understanding is that a 302 should have at least 10 psi per 1000 rpm. If that rule of thumb is true, I'm still not getting enough oil pressure in the higher rpms.

The second diesel treatment came out clean and the 5W-30/marvel was pretty clean too: just slightly brown. At this point, I'm suspecting my pump and/or bearings are simply worn like one would expect from an engine with nearly 200k miles on it that probably wasn't meticulously maintained.

What do you guys think? All this flushing absolutely made an improvement, but it's still not where it should be. Time to commit to 10W-40 and run it as long as it holds together?

You have done good with the extra oil changes and MM added, etc. I think it should be good now, and clean, to just take good care of it and watch it last another 100k miles. I tend to buy the 5-30 and 10-30 oil during the cold months, and then use the 10-40 when it's hot. I keep 3-4 jugs of oil all the time, I get it when Amazon has a better price and skip it when they raise it randomly. I usually pay $24 plus tax give or take a couple of dollars. Mine was close to 266,666 miles today at work, it's the most I've had on a car since I sold my first 86 Crown Vic, with 335k miles. That was on its 2nd engine and trans though, this one is original now.
 






The Mounty seems happy with 10W-40 for now. I put it to work all weekend hauling trailer loads of brush and rotten barn wood to our burn pit. Today I hauled a couple loads of fire wood to the house.
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Wood stove season is upon us, it's supposed to be down to 10 degrees this weekend!

I'm really looking forward to having a 4WD vehicle this winter as I've never had one before. I've only needed to use 4 high a couple times so far when crossing a ditch in the middle of our property, but I'm already a fan of the 4406.
 






Send some of that my way. I just got my parents old Vermont Castings wood stove set in my living room.
 






Nice old wood stove!!
My wife loves the old Fischers we have a few
Of them… they look awesome and work great but they are not efficient! Hahaha
Without 4wd I wouldn’t make it to the house hahaha the goal was to live where you would camp

Glad the mounty is doing winter work instead of needing an engine!!!
 












Glad the mounty is doing winter work instead of needing an engine!!!
That's an understatement. If this "engine donor" needed and engine, it wouldn't be a happy day.

We should do a wood stove thread.
Ours isn't that old or cool, but works well. It came with the house.
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Now that the Mounty is healthy, I really need to get the log splitter going. That carb has been giving me a heck of a time...
 






Here's mine. I'm looking for a 6 inch diameter chrome exhaust pipe, and perforated heat shield from a semi truck for the chimney pipe. Stove has an oval port, which everyone says just bend a round pipe to fit, no adapter needed

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I'm looking for a 6 inch diameter chrome exhaust pipe, and perforated heat shield from a semi truck for the chimney pipe.
Dang! I wish I'd known you needed one. Before I started staying home with the kids in September, I was working for the company that does all the stacks (tube bending, polishing, and plating) for Peterbilt, Kenworth, etc. You wouldn't believe how much shiny scrap leaves that place in the dumpster -- it's just not cost-effective to strip carbon steel tube if it has plating defects.
 






I'm rocking a wood stove fireplace insert on cement blocks, in my garage.

IMG_20241125_112703122.jpg


Add a chunk of copper wire for color flame

IMG_20241125_101125307_HDR.jpg
 






Seems like we all share the same passion!
 












We should start a thread for this topic, seems like we have plenty to talk about.
 



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