![]() ![]() ![]() In this case I have to start re-surfacing the deck and give the engine a final cleaning with parts cleaner before I remove the pan and timing cover. What's important to realize here is the fact that when cleaning and re-building an upper-half there is a process to follow in an effort to ensure as little dirt gets into the engine as possible, and what does get in must be able to be cleaned out. Here it is after a power washing, getting further dismantled. Then before you take the pan and such off you have to do the rest by hand with parts cleaner. Getting these dirty aluminum engines clean is a PITA! The first step is a power washing. Here you can see the engine is badly in need of a cleaning. Here the engine is placed on a bench awiting service for service Not pretty, but it will live, your wallet however may not. This is what happens when a chain guide breaks, falls into the contact path of the timing chain and then throws off said timing forcing the valves to kiss the pistons. The check engine light was on and low and behold I checked the engine and it was missing! LOL Lot's of clean and prep work to do in there before the engine gets re-installed. Here everything is just about ready for engine removal. Here is the vehicle as I am just starting to get everything in order to remove the engine. So providing he does not end up going the 560 upgrade route we should have a nice little upper-half re-build documented for the 420. Another plus for this 420 is the owner isnt affraid to spend the money. Usually most people will spring for a used engine, and that may very well be what happens here however it would seem the customer is most interested in keeping the 420 all original for the most part. Although I must admit it can happen to anyone it's just frustrating because I feel like it could have been avoided. In this case the customer was literally in two months prior to this chain guide giving up the ghost and at that time I told the customer to get the guides done as soon as possible. ![]() Broken timing chain guides that end up destroying an otherwise healthy engine. ![]()
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