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Jurgen Manske (4.61.102.121)

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Posted on Monday, October 15, 2001 - 5:27 pm:   

Would like to get some Expert Advice on how to find out if you have a good Engine or a worn out one. Someone told me if you drop the Oilpan and
check the Center Bearings, you can tell in what Shape the Motor is in. I am planning of buying an
1980 Eagle 10 with an 8v71, 4 Speed manual with a single Axle or an 1972 Prevost with a 8v92 and a six Speed manual Spicer Tranny. The more Help I get the better.
e-mail:a.germanjoe@verizon.net
Scott Whitney (63.151.68.130)

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Posted on Monday, October 15, 2001 - 10:58 pm:   

Hi Jurgen,

I am no expert - but I can concur that I've heard your info is correct about inspecting the main bearings. This info came from the DD rep in Laughlin who has a reputation for telling it like it is. He said it was well worth paying a shop to pull the pan and inspect the center bearings. If they are shot, you can expect the rest of the engine will be close to shot too. If they are good, it is no guarantee, but a good sign. If I remember correctly, his definition of shot was heavy scarring or grooves. Simply having the outer coating worn off was not a big deal. Maybe someone with first-hand engine experience can give you more details. He recommended that anyone considering buying a coach, or anyone who bought a coach with unknown engine history pull the pan and have a look. Once in there, (if you own the bus already) he recommended changing the bearings whether worn or not.

Scott
Dale Leyten (216.23.152.10)

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Posted on Tuesday, October 16, 2001 - 2:19 pm:   

For a quick and easy report on engine - or trans or diff - condition, get an oil analysis doen. This involves draining oil from whichever part you want to check - about 1/2 pint - and sending it in to be checked. They are looking for the percentages of various metals as they wear. A main bearing will be a different material than a rocker arm, etc. It takes about a week to get an answer back. Any HD dealer for dozer,loader,hoe etc. will be able to steer you in the right direction - most will accept your sample and send yours out along with theirs. On new engines it is a good idea to have one done at oil changes for the engine, and once a year for diff/trans. If you can fix it before it breaks it is way cheaper than waiting til you hear the bang. good luck, Dale
Scott Whitney (63.151.68.130)

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Posted on Tuesday, October 16, 2001 - 3:54 pm:   

I use Butler for oil analysis.

http://www.butler-machinery.com/oil.html

For 12 bucks they mail you the kit which is prepaid mail back to them too. So total cost is $12. Quick and easy . . . It is helpful over time cause you can see pattern of wear or contaminants. I sent in one sample on my engine when I first bought my bus - nothing screamed neglect, fortunately. I am going to send my second sample in soon with about 1000 miles on my first oil change since I owned the bus.

Scott

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