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#1
11-28-2020, 11:27 PM
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Out with the old. In with the new (soon)
Looks like my 474 ate a bearing last Wednesday after racing. I was driving home when the dreaded knocking sound started. Pulled over quickly and got a trailer to get it the rest of the way home. When pulling it back into the shop there was no noise, but the oil filter had a lot of bearing flakes in it. Pulled the 474 out today and took the pan down, looked at 4 rod bearings and they are not the culprit. Some metal transfer, but the journals just need a polish. Its taken 7 years of street and strip abuse. Not as long as I would have liked it to last. I was planning on swapping the 535 in at the begining of the year anyway. I will be putting the 535 on the dyno hopefully in December then dropping it in the car.
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#2
11-29-2020, 07:20 AM
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Not a happy time, but atleast you did not ventilate the block!
Was/ is it a cast Crank in the motor from the aftermarket?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
11-29-2020, 07:56 AM
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Quote:
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#4
11-29-2020, 11:48 AM
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Sad that's for sure! Sounds you will still have some decent usable parts left.
For the next back up! |
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#5
11-29-2020, 01:05 PM
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I decided to get off my a$$ this morning and look at the bearings. Most were nice. 1 main had some copper showing but smooth, not all chewed up with flakes missing. # 6 rod had some material transfer but crank looks good. # 8 is the one that spun and was hammering. Rod has some "blueing" from heat. Crank looks ok. Still think maybe just a polish. Nothing i can feel with my fingernail. So, hopefully 1 new rod, polish the crank and reassemble. Still have to completely disassemble so the diagnosis could change.
Pic is # 8 rod cap bearing half |
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#6
11-29-2020, 01:45 PM
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What connecting rods were in the engine and did #8 seem to have full torque on the fasteners when you removed them?
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#7
11-29-2020, 03:15 PM
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Glad it wasn't any worse than it was Scott. The 535 will be fun!
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#8
12-02-2020, 10:04 PM
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What kind of main bearings were it it ? Slotted or the round hole.
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