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Diesel R hits on 1 cyl, then 2

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DHunt

02-10-2003 13:36:01




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My '53 R has been sitting still in the shed for a while as I work on sheetmetal and other restoration details. Curiosity got to me one morning as I realized all the time I've owned it, I've never tried to start it in bitter cold. So for no other reason than 'what if', I fired up the pony and tried the diesel. After letting the pony run for about five minutes, I engaged the starter, let it turn about six times and released the compression. On the second revolution one cylinder fired, but not the other one. I held the pony in, released compression and tried again. Same thing. It took another several minutes, of letting the pony work before both cylinders finally fired and the diesel took off on its own. It was 0 degrees in the shed so I didn't expect a miracle from the diesel, but it bothered me that one cylinder fired so quickly and the other took so long to come around. In warm weather, it always fires on the first try. Can I disregard this as temp difference from the pony exhaust, or is it a signal that one cylinder is needing attention? I don't have the tools to do a compression test. (yet) Is there a way I can test both cylinders without complete disassembly? Thanks.

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Lee

02-10-2003 17:41:19




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 Re: Diesel R hits on 1 cyl, then 2 in reply to DHunt, 02-10-2003 13:36:01  
One injector may have been laying down on you, it would be a pity to see you overhaul it just to fix an air bubble. Maybe both injectors need a tune up? Repeat the test after it runs good, but do it within 24 hours instead of 6 months?



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Clooney

02-10-2003 14:05:21




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 Re: Diesel R hits on 1 cyl, then 2 in reply to DHunt, 02-10-2003 13:36:01  
DHunt, it's probably just that the pony warms one side of the block more than the other when dumping it's warmed coolant into to main engine block. Try motoring the main engine under compression & the fuel off for a few revolutions to heat the combustion chambers. On my winter snow plowing 2-cylinder diesel I keep it in the front barn with some restored tractors so I use the pony to motor the tractor out of the barn in 2nd gear before giving it any fuel to keep from smoking & sooting up the barn. I have found [by accident or luck ] that using the pony to motor the tractor out of the barn makes it an almost instant starter due to the pony making plenty of exhaust heat & coolant heat. It seems that putting that pony to work a little really helps it's heat output in sub 0� weather.
~Either its the temperature difference between sides on your R, or possibly there was a little air in one of the injector lines from sitting....

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G Taylor

02-10-2003 20:04:47




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 Re: Re: Diesel R hits on 1 cyl, then 2 in reply to Clooney, 02-10-2003 14:05:21  
Reminds me of when as kid finally home after school in a blizzard, my Father came into the house half froze. He was spreading manure with the 70D and the #2 summer diesel waxed the fuel filters in the sudden unexpected Nov storm. We took the 2020 gas loader tractor with tire chains and tow chain to the back field. On a couple of hills the 2020 would spin out until Dad fired the starting engine and rotated the diesel without compression. It was enough in 2nd gear to assist uphill and later back it into the shed. Am I ever glad we found and bought back/restored that 70D tractor. The memories she holds. That R may well have a lazy injector or pump. Or low compression in one cylinder. Once the diesel engine is up to idle rpm, both cylinders should be firing. Enough heat from compression should be in both combustion chambers to ignite the fuel oil.

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Starting a diesel in cold weather is not a race

02-10-2003 13:48:18




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 Re: Diesel R hits on 1 cyl, then 2 in reply to DHunt, 02-10-2003 13:36:01  
Let the pony run at idle for 20 to 30 minutes in 0 degree weather. The pony shares the same water and the exhust of the pony goes throufh the intake of the diesel to PREWARM the intake air to aid in starting



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