I just returned home from a 600 mile trip with a very noisy motor. I had just gotten to the bottom of a steep mountain pass and gave her gas more gas and for the last 25 miles it screeches and squeals. I took off all the belts the next day and it didn't make a difference. I'm thinking it is likely the transmission but it is hard to be sure.tomorrow I'll pull the starter and unbolt the torque converter from the flex plate to determine if it is the transmission. I'm getting too old for this heavy work.

Well crap I separated the torque converter and it isn't the trans. The sound sure sounds like the flex plate is involved then I found the cause the crank shaft has around 3/16" end play so the crank thrust bearing is toast and possibly a nice crank. This is not good news on a low mileage engine. Another engine removable is in my near future.

roy1 wrote on Thu, 16 April 2015 19:12

Well crap I separated the torque converter and it isn't the trans. The sound sure sounds like the flex plate is involved then I found the cause the crank shaft has around 3/16" end play so the crank thrust bearing is toast and possibly a nice crank. This is not good news on a low mileage engine. Another engine removable is in my near future.

Really sorry. Early failure in these engines when rebuilt is getting scary.

Well crap I separated the torque converter and it isn't the trans. The sound sure sounds like the flex plate is involved then I found the cause the crank shaft has around 3/16" end play so the crank thrust bearing is toast and possibly a nice crank. This is not good news on a low mileage engine. Another engine removable is in my near future.

"Screeches and squeals" does not sound like an internal engine problem. It's hard to get that sound from metal slinging and swimming in oil. Engine is usually knocks, rattles, rapping and ticks. Take a piece if fuel hose and use it as a stethoscope to figure out where the sound is coming from, just be carefull by belts and rotating assemblies if the belts are back on it.

Charles,
Looking at the bearings and crank you might still be in good shape. Have the crank cleaned checked and micro polished, it might be ok. Clean the rest of the engine looking for metal parts. Power flush the engine oil cooler or just bypass it and add and external cooler. Be sure to clean the rest of the oil system. Might just need new bearing to make the fix after you check everything.

J.R. Wright
30' Buskirk Stretch
Michigan
On Location in St Louis, MIO

> On Apr 17, 2015, at 8:57 AM, Charles Boyd wrote:
>
> While no one I have talked to has heard of it happening, I just took an engine apart that the oil slinger was rubbing the timing cover. Produced
> metal shavings and all down hill from there. Engine was built 5k ago.
> http://www.gmcmhphotos.com/photos/texas/p57450-oil-slinger-2c-timing-cover.html
>
>
>
> JohnL455 wrote on Fri, 17 April 2015 09:43
>> "Screeches and squeals" does not sound like an internal engine problem. It's hard to get that sound from metal slinging and swimming in oil.
>> Engine is usually knocks, rattles, rapping and ticks. Take a piece if fuel hose and use it as a stethoscope to figure out where the sound is coming
>> from, just be carefully by belts and rotating assemblies if the belts are back on it.
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
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Torque converters do not place end play loads on crankshafts...

Sir, while you have found the problem you still don't know the cause. Maybe do an oil analysis to check for unsuall contaniments such as iron or steel or antifreeze or gas.

roy1 wrote on Thu, 16 April 2015 22:12

Well crap I separated the torque converter and it isn't the trans. The sound sure sounds like the flex plate is involved then I found the cause the crank shaft has around 3/16" end play so the crank thrust bearing is toast and possibly a nice crank. This is not good news on a low mileage engine. Another engine removable is in my near future.