I have been told to not do extended cranking on engines that have been sitting that use a roller follower overhead cam. Examples are 4.6L Ford Triton, 3.7L/4.7L Chrysler or 3.6L Chrysler Pentastar. The reason is that if the lash adjuster has collapsed due to hydralic bleed, the roller follower can "fall off" and bend the valve stem. The advice is rather to start it and let the pressure build fast. I have personally heard and seen this on jeep 3.7L engines and we were able to pop it back on with perfect success.
I like to use clear flood mode, and crank engines that have sat 1 year or more, and I usually like to crank them for 15 seconds, usually 3 times giving a break on the starter. This gives the entire lube system a chance to pressurise.
I would like to do this on a ford cyclone 3.7L tuaurs engine. It has sat for 3 years and i would imagine all the oil as gravity drained to the pan. Is it safe for this bucket cam style valve train to accept extended crank time assuming it is dry?
I like to use clear flood mode, and crank engines that have sat 1 year or more, and I usually like to crank them for 15 seconds, usually 3 times giving a break on the starter. This gives the entire lube system a chance to pressurise.
I would like to do this on a ford cyclone 3.7L tuaurs engine. It has sat for 3 years and i would imagine all the oil as gravity drained to the pan. Is it safe for this bucket cam style valve train to accept extended crank time assuming it is dry?