Highest Miles on a 4.0
 

I have a 1999 Disco with 179K on the ticker. Wondering what the life expectance of the motor is before I invest more money into the ride.

Really depends on the motor and how it was treated. Mine has never missed an oil change, has had all of the scheduled services, and has always run premium gas. It has 128k, doesn't burn a drop of oil, and still runs like new.

So who knows, but I expect to go well into 200k.

My 99 has 125k, is very quiet and runs strong.

Increments of 25k miles. That's what I plan to shoot for, and will hopefully re-evaluate then (150k for me).

Dino, take her to 200k.
:D

Well, she runs good as new and has a new set of tires so I might as well burn them down. I'm thinking I can get another 40-50K out of her before anything goes bad since it has a new heads on it anyway. It doesn't smoke or leak at all so why not!!

122k with the original headgaskets! Probably not for much longer, though.:p

At 180,000 plus you should plane on issues showing up. Cam will be pretty warn out, will need a timing chain and gears, a oil pump replacement and valves if they haven't been done yet.

Mike, is it easier to just swap in another used engine with less miles versus an overhaul on the existing one? I recon it would cost the same?

Pretty sure you can do all the stuff mike recommended without even pulling the motor. As far as I'm concerned, if you have good oil pressure and aren't burning oil the bottom end is still good to go.

PS. At 200k I'll probably be looking for another truck. The Jeep was at 208k and had just started blowing a little smoke when you fired it up. Probably needed a valve job. Who knows, if the body is still straight and rust free I might think of a new motor, but a new truck is more likely. Heck, at 128k I think I have already got my money out of it. At 180k it may need all that stuff Mike recommended but I bet it will make it to 200k without it. It will be on borrowed time though.

I've had great luck with cars. I drive them into the ground. My VW was the only exception. Head gasket at 127k. I had a dodge van with 316k on its original never rebuilt 318. It didn't run well bit it did run. Lol

Mike,
I have done everything you sugested in the last 10K. Cost me about $2K to get it all done. Only thing left out is the oil pump. Thinking she is good to go for awhile.

205,000 miles all original, all I do is change the oil every 5,000 miles using Shell Rotella.
I use about 1 qt of oil between oil changes.
If it ain't broke dont fix it.
If you are not going to rebuild the whole engine why spend the time and money replacing major parts in a otherwise perfectly good running engine?
But then again you DII guys have alot more engine problems than us DI guys.

Had to go there... lol. The D2s have more cargo space to hall all of them tube tvs and old betamax players you D1 guys are so fond of to the dump.... ;-)

LOL, That, AND we don't have to drive past a bank to know what the temperature is outside! :p

My P38 has 232k and the only major work it has done to the engine is head gaskets.Still runs great:)

Me either!!

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And we can use our a/c and not have the engine overheat. lol

Hey now, my Sony Betamax still works and the picture is great!!
And dont even get me started on my Technic's turntable...

Methinks non OEM there, Phil...:p

BUSTED!!
You caught me, I bought the mirror brand new off of Craig's List for $100 and installed it in about a hour.

Must be nice. I don't remember when I last saw 73, even at night. ;)

Know what you mean. Mine showed 107* when I got in it to go home for lunch today. Granted, I know it shows an average of 5* higher than bank's thermostats.

That pic was from when I installed the mirror over a year ago.
It was 92*F here today with 80%+ humidity so the heat index was well over 100.
We had both a heat advisory and a ozone action day today.

200k+ club?
 

I have a 97 Disco SD with 235k, all original. I hope it is the energizer bunny.

198k on my D2 with no real issues. i wish i knew what the previous owners did maintenance wise. it's pretty obvious it was taken care of for most of its life.

182k and still running. Knock on wood. Ha ha.