damaged bearing
02-01-2016, 01:54 AM
#1
damaged bearing What do you guys think that caused this? 416 iron block, k1 crank and rods, wiseco pistons. Mains clearances at 2.5
Other mains weren't like this, this is #4 main.. others were scratched only. I'm assuming block wasn't thoroughly cleaned and caused this? Happened after a WOT pull, engine had about 300 miles. 10-40 weight, oil pressure at operating temperature always read 25 ish
Journal was smooth on all mains on the crank..I'm confused on what caused this damage.
Other mains weren't like this, this is #4 main.. others were scratched only. I'm assuming block wasn't thoroughly cleaned and caused this? Happened after a WOT pull, engine had about 300 miles. 10-40 weight, oil pressure at operating temperature always read 25 ish
Journal was smooth on all mains on the crank..I'm confused on what caused this damage.
02-01-2016, 07:37 PM
#7
That bearing obviously got very hot as stated above. That's not from excessive metal or anything else.
It's an oil problem. If you personally measured your tolerances and did it properly, check to see if that #4 oil galley is plugged up. Even aftermarket main studs and/or caps improperly line honed shouldn't wear like that.
I imagine with that bearing looking the way it does, you sent metal throughout your motor and other bearings will show some grooving.
On second thought, was that crank checked out before it was installed?
It's an oil problem. If you personally measured your tolerances and did it properly, check to see if that #4 oil galley is plugged up. Even aftermarket main studs and/or caps improperly line honed shouldn't wear like that.
I imagine with that bearing looking the way it does, you sent metal throughout your motor and other bearings will show some grooving.
On second thought, was that crank checked out before it was installed?
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02-02-2016, 12:04 AM
#8
Brand new rotating assembly from BTR. None of the journals were damaged on either the rods or mains. Clearances were checked with a mit mic and dial bore gauge and used plastigauge as well . The main cap also came out cracked and split in 2 when it was hit with a dead blow.
02-02-2016, 07:44 PM
#9
Brand new rotating assembly from BTR. None of the journals were damaged on either the rods or mains. Clearances were checked with a mit mic and dial bore gauge and used plastigauge as well . The main cap also came out cracked and split in 2 when it was hit with a dead blow.
02-02-2016, 09:46 PM
#12
Brand new rotating assembly from BTR. None of the journals were damaged on either the rods or mains. Clearances were checked with a mit mic and dial bore gauge and used plastigauge as well . The main cap also came out cracked and split in 2 when it was hit with a dead blow.
If interested you can see at 8:50 also at 19:05 what aluminum silicon stock bearings look like driven 5 miles Zero oil pressure, now also at 19:05 you can see some of the same markings as your bearings had..
What happen was the oil pump bypass got stock open and i had to drive 5 miles out of the bush pulling a trailer full of wood to meet the tow truck, the engine locked up just as i made it to pavement.. now also if you continue watching you can see what contamination from spinning main bearing 4 did to the rest of the bearings i replaced with no cleaning AT ALL just thrown in bearings.. these replacement bearings were aluminum silicon king bearings... which was driven for 5 years 20,000+ miles, im sure the contamination happened on first start up.. there are more details if your interested just ask, i will also be making a better video soon, this was just a test bed for my new camcorder.. in-which i ended up uploading it anyways..
Last edited by the404man; 02-03-2016 at 12:57 AM.