Fj80oregon
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- #21
Yes I torqued 306. What do you mean by oil pump working properly? Brand new timing cover and engine staring building oil pressure.
Fresh rebuild crank won’t turn after installing in truck. (1 Viewer)
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Oil pump gear is friction driven, no key, and requires the HB bolt to be torqued to 305ft# for proper drive.
Well, because the oil pump is driven by the compression on the crank. If loose, it may build pressure initially, but not enough volume, thus starving the bearings.
What was your oil level!
Could the head not have drained the oil back to the pan, then starved the pump because all the oil is on top? Not sure how long it ran.
Anything external? Water pump, AC compressor, idler, alternator that may have locked up?
Fj80oregon
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- #24
thanks I bought a 4foot 3/4 drive just for that sucker and welded up a crank holder.
Fj80oregon
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- #25
Oil level was spot on, only ran 45 seconds roughly, every moving part was slathered in assembly lube and I added oil to the pump per fsm when installing timing cover. All accessories belts pulled to release any tension on the crank.
Did you have the supercharger installed?
Drive belt on it?
Did the supercharger lock up?
Drive belt on it?
Did the supercharger lock up?
Those cams look really dry.
Fj80oregon
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- #28
Super charger spins freely, fresh oil in the nose cone. I agree the cams had not got oil yet not sure how long it takes to start splashing around up there.
I would want to borescope the bottom of the timing chain, easy for something to have fallen down there or the chain otherwise bound up. If all OK there remove or loosen cams see if the engine will turn. IF the re-manufactured heads required very much machining to correct 'warpage' then when pulled down to the block it can bind the cam bores. Once run....these could have scored. Very puzzling to be sure.
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Start with the obvious, compression test and leak down test. Separate engine from trans if needed to perform the tests.
If you have not touched this yet, it came in and ran, then seized? Sounds like that is the case. Make sure flex plate isn’t busted, proceed to dropping the pan.
Obviously not a good thing to run it with no oil pump. Not the best design by Toyota for it to be run by a torqued bolt vs a gear that is keyed on the crank.
Cheers
If it ran for 45 seconds there should be oil in the head. I would definitely drop the oil to see what you have especially if you also pulled the plugs and there is no water in cylinder. Also judging by your half moons doesn’t look like you went crazy with fipg I’ve seen excess fipg used on timing covers and it blocks oil passages.
I had this happen to me on a remanufactured motor as well. Never really found out what happened. It turned 270 then bump both ways hard metal. Never really looked into that motor and still have it as a spare. I rebuilt the original myself and all is well 30k miles later. Maybe someday I’ll look into it.
Fj80oregon
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- #33
That’s the plan tomorrow borescope, pull cams. Head was decked .003 thousandths so not much.
Fj80oregon
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- #34
Hopefully it doesn’t come to that. Will have to pull the engine to perform those tasks as the crank is potentially seized? I installed this it’s my personal rig. Flex plate looks ok but will need to do a proper borescope. Will drop the lower oil pan also to inspect further if pulling the cams doesn’t help and the bore scope looks good.
Fj80oregon
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- #35
This was a brand new short block from Toyota and a reman head so we will see. I’ll get to the bottom of it. Was super pumped it’s been a long journey here but will get it figured out.
There should be a key between crank and harmonic balancer, and between oil pump drive gear and crank. If the keys are in place, crank bolt torque shouldn't be immediately catastrophic
I had a failure with a 1fz-fe with new crank, new bearings etc. Oil pressure relief valve jammed open shortly after oil pressure came up on start up.
It ran for around 10 minutes before assembly lube was displaced and a knock became apparent, bit just 45 seconds.
Timing case was damaged on mine. Damage caused the relief valve to get stuck open.
Last edited:
mehbohdi
SILVER Star
Pull oil filter and cut open...... questioned answered
Fj80oregon
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- #38
This was replaced along with all the other gears.including new oil cooler cover and timing chain cover/oil pump.
Ecliff5
SILVER Star
I'm sure you did, but did you also replace the oil orifice on top of the block?
Ecliff5
SILVER Star
Also, how was the oil pick up tube after the original engine lost oil pressure? When mine lost oil pressure the screen was covered with metal shavings. I replaced everything that oil touched but can't get a pick up tube so we removed the screen, hot tanked it and put the screen back in the tube.
