NoLookingBack

150 pounds each cylinder... I think thats pretty darn good for a 25 year old motor no?

jct61765

how many miles on it?

Glenn

That's pretty good. How has it been treated over the past quarter century?

NoLookingBack

ahhhhhh.. yes the mileage would be helpful... it currently has 126K on it... oil has been changed somewhat ok.. no major sludge when I pulled the pan or valve cover ( just your usual 25 year old carbon deposits) . I cleaned the valve cover, oil pickup and changed the oil pump gasket while I was at it.. The pickup had a bit of crud that was blocking it. The oil pressure is better now reading 4 bar while I am cruising on the freeway and never falls below 2 bar at idle.. I have been using 20w 50 but will change to a 10w40 or 10w30 once it starts to get a bit cooler here ( which in the bay area doesn't get that cold anyways but its enough..)

3.4v6

what you mean it dont get cold ... i freeze my ass off everyday here in Daly City. lol

obscurotron

SWEET F***ING CHRIST!!! That's *awesome*.

Note to self: Check your 3.4L in 2029 and see if it shows 150psi on all 6 holes
Prediction to self: No, it'll be scrap long before then.

They don't make them like they used to.

NoLookingBack

SO how do you really feel? I knew when I first got this truck, that it was in really good shape... The main thing I look for is if it shakes alot... That tells me that the compression is uneven in the cylinders... this one barely moved... And don't count the Toyota's of today out... Much better oils and better fuel management etc... lead me to believe your truck will still be here.. Now what its gonna run on is anyones guess

I still think the 20R motor was much better built than the 22R.

84sr5yoty

I've got 165 psi in all 4 cyl with almost 200,000 miles on my my 84. I know a few people with considerably more milage and more psi than I have.

"I still think the 20R motor was much better built than the 22R."

I think there is some magical combination with the 78-84 20r, 22r(e) motors. I've seen plenty of these motors go beyond 500,000 miles yet it's rare to see more than 300,000 miles on 85+ 22r's.

kyle_22r

the 20R and early 22R bottom ends were almost identical other than bore size, piston shape and the fact that the tangs on the main bearings were in different spots through the years. even the timing set(dual row, steel rails) was the same until 1982.

for some reason those engines would run half a million miles without major problems, my 20R went 316k before the front main was puking too much oil and i had a new engine built ready to go in. didn't have much compression left but it still ran fine