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Discussion Starter · #1 ·
well as the title says i tore the motor apart this weekend because i kept loseing coolent but had no visable leaks so i suspected a bad base gasket (same thing happened to a buddys sled) so i pulled the cylnders off and dont know what to think of what i found. does anyone know if the stock pistons in these sleds were moly coated? because you can see that the ones in it were but most of the coating is worn off and they dont look the greatest. theres also evidence of rust on the crank weights (from the coolent im assuming)ive been running klotz in it the past year and amsoil interseptor was run in it before that sence new. do you guys think they should be replaced? and also im including a pic of my head i noticed he burn pattern on both sides were different is this normal? thanks for the help in advance guys. ray

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I know the moly coating doesn't stay on most of the time. Since your in there it wouldn't hurt to go in and replace seals, bearings ect. You could also replace pistons and rings depending on the miles on them. I'm not sure about the crank weights, someone else would have to chime in.
 

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whenever an engine is opened up the crank should be taken to a good shop for inspection.
 

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Discussion Starter · #5 ·
the motor has approx 7000 miles on it. i figured i should split the cases and check the crank out. the bulkhead has been partially cleaned, when i got the sled the oil cap leaked and the guy said it had sence he bought it new =/ so ive gotta clean the rest of the crap out of it. how do the cyls look to you guys from the pictures?
 

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Have the crank rebuilt before winter, rust like that is just a timebomb in an engine. Full synthetic has no rust prevention additives. Yes, the pistons are molycoated but do wear off, leaking coolant into the engine speeds it up same with using full synthetic oil all the time. $400 will be well spent on an overhaul, I'd run non-synthetic oil or blended afterwards.
 
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