Just about all the engine bearings and maybe the rings also.
Richard
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| What goes first when a slant is run with no oil https://slantsix.org/forum/viewtopic.php?t=55375 |
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| Author: | fatdaddyadam12 [ Sat May 17, 2014 5:17 pm ] |
| Post subject: | What goes first when a slant is run with no oil |
Ok y'all my brother ran his Aspen out of oil. He still has 50 pounds of oil pressure but the engine chatters, did he wipe out the cam or the rocker assembly? Thanks, Adam |
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| Author: | Fopar [ Sat May 17, 2014 5:33 pm ] |
| Post subject: | |
Just about all the engine bearings and maybe the rings also. Richard |
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| Author: | fatdaddyadam12 [ Sat May 17, 2014 5:56 pm ] |
| Post subject: | |
How could the bearings be gone if it holds 50 pounds of oil pressure? |
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| Author: | Fopar [ Sat May 17, 2014 6:57 pm ] |
| Post subject: | |
You have a oil pump that will put out more oil than the engine can use, if it didn't have a pressure release (spring loaded bleed off) how high do you think the pressure would be? The lack of oil to lube the bearings will cause excessive wear (making too large of clearance). Richard |
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| Author: | Charrlie_S [ Sun May 18, 2014 4:49 am ] |
| Post subject: | |
A bearing can "spin", and then close off an oil passage in the crank, or block. |
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| Author: | fatdaddyadam12 [ Sun May 18, 2014 7:20 am ] |
| Post subject: | |
Well I didn't think of that. Thank you. I told him to park it till I can get up there and look it over. Thanks again. |
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| Author: | SpaceFrank [ Sun May 18, 2014 9:11 am ] |
| Post subject: | |
I'm just curious. How low does the oil need to get before it causes a problem in normal street driving? Back when I was an idiot teenager with a leaky rear main seal, I let mine get about 3 quarts low once or twice... |
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| Author: | Aggressive Ted [ Sun May 18, 2014 10:10 am ] |
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My bearings got hot and turned blue and then started knocking when my new oil filter blocked and would not bypass any oil. It just shut off all oil flow. That was doing 65 mph up a grade. Rings, pistons & cam were all fine from all the oil splashing. After I found a automotive store and purchased and installed a new filter I drove it home 60 miles. It was sad to hear the rod bearings knocking that much but it ran fine. I am thinking that the synthetic oil may have helped limit the damage. |
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| Author: | slantfin [ Sun May 18, 2014 2:16 pm ] |
| Post subject: | Btdt |
I ran a slant six out of oil: no gauges. Once the steam started coming out it was cooked. I tried rebuilding the head, but it always smoked after that. Finally I got a replacement motor for $100, a BH block with low miles. Before I swapped it in, I put in a little more aggressive cam and planed some metal off the head. No problems after that. It's not that much harder to do it correctly, which I didn't really do, but you can calculate the combustion chamber volumes and dial in a compression rate. Ideally you would plane the block the correct amount. |
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| Author: | fatdaddyadam12 [ Sun May 18, 2014 3:53 pm ] |
| Post subject: | |
My brother said it took 4 quarts to bring it up to the full mark. I just can't see how a grown man can run a cool looking nice old car out of oil???? Go figure! |
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| Author: | cpslntdchrg [ Mon May 19, 2014 9:12 am ] |
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1- it is not his car 2- (to give him a line) he has not drive the old car enough to know when it sounds like crap, or carefull checking instruments now and then |
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| Author: | oldskoolracer [ Mon May 19, 2014 9:45 am ] |
| Post subject: | |
I had mine spin a bearing on the highway at about 70mph... Oil light came on, by the time I got pulled over the engine locked-up... Maybe 30-45 seconds of no oil press. Pulled the engine, every bearing was mush, and crank was destroyed, cam was eaten raw and lifters were just the same... Oddly enough the engine never made a single tick? |
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| Author: | fatdaddyadam12 [ Mon May 19, 2014 11:51 am ] |
| Post subject: | |
Well I got a good core for a rebuild so my brother is going to get a crash chorus in engine rebuilding. 
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| Author: | sandy in BC [ Mon May 19, 2014 3:52 pm ] |
| Post subject: | |
I usually get a crash chorus when I run it out of oil........ |
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| Author: | DusterIdiot [ Mon May 19, 2014 7:14 pm ] |
| Post subject: | Lol... |
Quote: I usually get a crash chorus when I run it out of oil........
LOL...last time I saw a slant run with no oil...the symphony ended with #5 poking out the driver's side of the block and a hole through the oil pan...  -D.Idiot |
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