I've never heard the tractor engine origin. The engine is under-square, like a tractor engine and has also been used in fork lifts. Do you have anything to substantiate that?

I've held 4k up maybe 10 mile long steepish hills (climbing maybe 2-3000' or so???). No ill effects.

I know that it can hold up 4K, I'm just saying that driving it at 90 for an extended period of time may not be the best for a 1989 truck with 225K miles.

That said, a few years ago I lost 5th gear and drove around all summer going 70 in 4th at about 4k. My timing chain eventually wore a hole through the cover and/or blew a head gasket.

My point was that if you want to make your truck last maybe just drive it a little more conservatively than going 90 on the freeway.

You might be right there old man, about the redline thing.... I'll take the rest of that under consideration. Where I've been has been running diesels my whole life and they never quit. I figured the bomb proof Toy drive train is at least equal to a 77 Scout II with the SD33NA diesel in it (just better looking).

I do know what redline means.... I also understand that 1600rpm before that is not a show stopper. I never said I ran at redline... hell I've very rarely borken the 4500 barrier.

I don't want to get into a peeing contest over this with you since you've probably done more wheeling than I'll ever see but don't be an a$$hole.

There's a redline?

Is there a blue line?

LOL now that was a great response! And yes I'll have to Google it to get the correct tech response back to you. As for what I know, from running diesels, the redline is a when the engine is turning rpm to a point at which the valve train and lubrication system can no longer keep up. This is the piont at which the engine begins to break down due to excessive heat and friction build up. (bacially the motor pops)

If that's wrong then give me a second or two on Google and I'll change that comment.

Damn you type faster than I do.

Yes Diesels have a redline, or rpm max that is healthy. No a Scout II with the diesel would never keep up with a Toyota although in stock form a Scout will do a little better I think (with the diesel) off road. The only way to judge that would be to get an 85 Yota and an 80 Scout II and try them. I'd have to lean towards the Scout from prior knowledge.

Junkers, I think you may be right in your assumption that the oil pump might be tired. That's what I was thinking on my old 87 when I saw the oil pressure drop after a while I just never fixed it and eventually sold with no issues.

At least it can hold up 90 MPH for a minute right?

Toyota Recommends shifting between 2-4k rpms for 22r-e. That being said I would never push it no more than that. I think 75-80 is the fastest anyone should ever run a 22r. In japan the first related "R" engines were used japans light tractors and small farm vehciles and equipment, but later it was redesigned into a gasoline engine and used in alot of there cars. They made it into some of their patrol cars and even a few small ambulances. They first imported the "R" engine in america back in the late 50's in the toyota crown i think. and it at the time was a 1.5 liter tiny OHV cam in block engine. Made to be economical it didn't do well in america though.... IT was on par with lots of other engines at the time being cast iron block and water cooled..... just like most.... a few years later in the 60's when the toyota stout cam out i believe it had the 3R or the 4R i'm not sure then in the hilux cam out for the first time and also adoptded an R engine.....

Dang it! Ok so the redline is the stopping point before damage can occur? I got that... now. And the 5600rpm is the stopping point for more power? Is that right?

I thought it stopped making power at 3800rpm.

wow........

It held 90mph for about 120 miles on open road (probably 300 miles all together on the trip). I'll change that pump though for my next run.

Man you and I have got to sit down over a glass of iced tea and talk Toyota engines. I need to pick your brain for a few hours.

Red means stop....or dead....or wrong..... or no no.... or bad boy....or hot.....or fire.....or boom.......or BAM......or never.....or emergency....

When I hit the hills it would drop back into the power area and pull. No down shifting.

Oh? So the gear driven oil pump stops producing oil at higher rpm? Damn that is something nice to know. Probably should have been in the owners manual.

So, theres a yellow line?

Well by 4500k rpms the oil is moving so fast and so hot its practically water.

^^So, you don't think the oil pump is the cause of lower oil pressure on extended periods of use? Is the oil just thinning out?

Dances with the Stars....Ouch....Burn (that show sucks)