Quote:
Originally Posted by aquazulu2
Sherwood thanks for the pointers. As soon as I pulled off the piston sleeves I sprayed the still attached pistons with Carb cleaner I know some of the gook went inside the case before I thought of covering it up. Since I do not intend to split the case I am wondering if I should flush the the case with some type of cleaner before I start assembly. I am still on the fence about detaching the pistons. Is it advisable to clean the pistons in place, change piston rings and then start backing out to reassembly. I believe piston rings is as far as I am going in.
John
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Internal cleaning (or flushing) depends on the contents of the "gook". If it's just carb cleaner, don't bother. It evaporates fairly quickly. Same with any grease that liquifies with heat. An oil drain after breakin should be fine. Anything else, YMMV.
I would remove the pistons in order to clean, inspect for wear and to fit and install new rings. Caked on carbon needs a soak in proper carb cleaner. The pins are full floating fit, thus after removing one circlip on the exit side, use a suitable punch to remove the pin. Mark the piston and cylinder so they re-unite for assembly. Use Wayne's book and other reference manuals as a guide to reassembly. Take pics as needed to remind you how parts go together. Bag and ID parts, etc., etc.
You've reached one (or more) thresholds in the slippery slope. Depending on the status of the engine internals, you'll have to decide when to stop and begin the rebuilding phase. This includes a consideration of vehicle history (mag or aluminum case, vintage engine, miles) as well as a visual inspection of parts and wear, appearance of the crankcase internals, prior compression/leakdown test results, cylinder head condition, other signs of prior ownership maintenance, leaks, etc.
Hope this helps.
Sherwood