Hey,guys! My old reliable tractor parts getter has a problem I can"t figure out. 87 Celebrity wagon,2.5 Iron Duke. Oil light stays on,valves noisy,but engine runs fine,no miss,starts fine. I know these are noted for timing gears noisy,any chance of a spun cam bearing or the like?? Not an Farmall engine,so I"m not familiar with any problems these old engines have. Want to keep "er going,like the mileage the ol" girl gets. 127,000 miles. Need to decide if I should just replace the engine or try to straighten this one out. Calling for 50 here Saturday,is the worst past?? Thanks for any help y"all can give me!!
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- Thread starter Ol' Gimpy
- Start date
buickanddeere
Well-known Member
Replace the oil pressure light sending unit/pressure switch. Use straight 50wt oil.
Steve@Advance
Well-known Member
Oil light on, noisey lifters... Sounds like zero oil pressure. Hopefully it's not being driven that way, if so it's probably too late.
If you think it's salvageable, pull the pan and oil pump, look for the obvious, like sheared pump shaft. Possibly cam gear has shed pieces and locked the pump.
How could the pieces of gear get past the strainer? There is a spring loaded bypass ring under the cover. Cold oil doesn't like to flow through the screen, so the bypass opens and lets the accumulated trash flow straight to the pump.
If you think it's salvageable, pull the pan and oil pump, look for the obvious, like sheared pump shaft. Possibly cam gear has shed pieces and locked the pump.
How could the pieces of gear get past the strainer? There is a spring loaded bypass ring under the cover. Cold oil doesn't like to flow through the screen, so the bypass opens and lets the accumulated trash flow straight to the pump.
Steve@Advance
Well-known Member
PS
Forgot to say, check the oil pressure first with a mechanical gauge.
If there is no oil pressure at all, the pump is probably sheared. Possibly repairable, if bearing damage hasn't been done.
If there is low pressure, say under 20 lbs idled up, warmed up, it's probably spun bearings. RIP
Forgot to say, check the oil pressure first with a mechanical gauge.
If there is no oil pressure at all, the pump is probably sheared. Possibly repairable, if bearing damage hasn't been done.
If there is low pressure, say under 20 lbs idled up, warmed up, it's probably spun bearings. RIP
ShadetreeRet
Well-known Member
Buickanddeere's suggestion makes sense, replace the sending unit for oil pressure light. I have had that happen. Although 50wt. oil seems a bit heavy. If still no pressure, pull pan and check for sludge build up. I have also experienced sludge build up in pan and plugged pick up screen.
Allan in NE
Well-known Member
When the timing gears go, they sound like a diesel.
With no oil pressure and noisey rockers, I'd sure be for finding out what's wrong in a hurry. Drop that pan!
Allan
With no oil pressure and noisey rockers, I'd sure be for finding out what's wrong in a hurry. Drop that pan!
Allan
Kent Petersen
Well-known Member
i would check psi with a master guage before i started throwing parts at it
If it's a true "iron duke" engine,127000 miles dosen't seem like alot if it had 4000 mile oil/filter changes.Many of those engines found their way into boats where they worked far harder than in that little cracker box.As was said:slave in a direct reading gauge.If it has pressure,flush the engine with a couple of oil/filter changes and see what you have.
If it's a true "iron duke" engine,127000 miles dosen't seem like alot if it had 4000 mile oil/filter changes.Many of those engines found their way into boats where they worked far harder than in that little cracker box.As was said:slave in a direct reading gauge.If it has pressure,flush the engine with a couple of oil/filter changes and see what you have.
rustyfarmall
Well-known Member
Error
Christopher Susie
New User
Had one end up with a plugged oil galley once, parts of the filter failed and went into the top end, starving the cam and the lifters. same thing oil light would not come on but top end of the engine was starved of oil.....
Iron duke was a Pontiac eng., 1977 to 93, 151 cubic inches. Chevy 2 was called stovebolt eng. 153 cubic inches.
I bought a new Chevy Monza in 1980 with that eng. and a 4 speed, had the spider package minus the decals, nice, cool looking car but the eng. was a little noisy brand new.
I bought a new Chevy Monza in 1980 with that eng. and a 4 speed, had the spider package minus the decals, nice, cool looking car but the eng. was a little noisy brand new.
rustyfarmall
Well-known Member
(quoted from post at 09:49:00 01/10/14) Iron duke was a Pontiac eng., 1977 to 93, 151 cubic inches. Chevy 2 was called stovebolt eng. 153 cubic inches.
I bought a new Chevy Monza in 1980 with that eng. and a 4 speed, had the spider package minus the decals, nice, cool looking car but the eng. was a little noisy brand new.
You are correct. However, the term "stovebolt" also refers to pretty much all Chevy in-line engines. Starting with good ol' 216 cubic inch engine. "stovebolt" also refers to older Chevies in general, because of the hardware used to bolt 'em together.
MARK ROBKE
Well-known Member
I think there was a problem with thrust washer failure on these engines and the cam would bang back and forth sounding like a rod knock, but not affecting oil psi. Mark
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