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Hi All....before I replace the broken pistons in my '64 365hp and install the new Crower rods I got courtesy of Scott Marzahl, I would appreciate input from this board on how to deal with this junk we're buying for fuel. I'm assuming I have 7 pistons with broken ring lands because the engine smokes and has 7 oily spark plugs. I rebuilt this engine many years ago but has less than 1000 miles on it. Any opinions or advice is very welcome...Regards Frank
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Re: Hi Compression Woes
Frank
Are you blaming the fuel for your broken engine? I have a both 340 hp and a 365 hp engines and have run Sunoco high test since the rebuild on both engines and have not experienced any problems. 340 has about 15000 miles on it 365 about 8000 miles on it.
How many years ago did you rebuild the engine? Did you do it or have it done? How long does the car sit between starts and what kind of lay up for the winter do you do? How you done a compression test and a leak done test to determine problem? Were the heads done at the time of rebuild?
Do you see that you really didn't give us enough info to answer your question. There could be lots of reasons for engine failure besides the gas.
Terry -
Re: Hi Compression Woes
Seven broken ring lands? Does the top of the piston show any signs of detonation? Was the block ridge reamed when it was rebuilt? The slightest ridge will break a ring land off. One of the most common causes of broken rings that I see is the inappropiate use of ether.
I find it hard to believe in a street engine that you incurred enough detonation/pre-ignition to have that much damageDick WhittingtonComment
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Re: Hi Compression Woes
Thx Terry and Dick.....here's a little back ground on the engine. When I got this car in '78 it had what I thot was a leaking head gasket on the left bank. I pulled off that head and checked everything for flatness. I didn't find anything wrong so I put the head back on and right away I had water back again in #1 cyl. I pulled the engine and headed for my favorite machine shop because after checking the cyls it was time for a rebuld anyway. When doing the 30 over bore we found pin holes in #1 and #3 walls. Upon further checking we found that the block was originally bored off center. This was really noticeable when you looked at the cam bore from the front of the engine. Anyway My machinist said "this is no problem, we'll just get another BLOCK" to which I replied "NO NO you don't understand". After all the cyls were checked for thickness I had 3 sleeves installed #1-#3-#5 and the heads were done at the same time. Terry yes I am blaming the fuel but myself also for hammering on it a couple of times. I'm really confident I'm going to find ring lands broken. My winter lay up is not very special, When I know I'm not going use one of my cars for a long period I put a pint of STP in the oil, and I've never had any problems with the internals drying up even it's been years of sitting......Thx for your replies FrankComment
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