Results 1 to 5 of 5
  1. #1
    Join Date
    Jul 2017
    Posts
    134

    Turning engine over by hand question

    I have this concern floating around in the back of my mind about my L86 motor. I inspected the valve train and bottom end to the best of my abilities while I had the valve covers and oil pan off. When I go to turn the motor over by hand with a ratchet wrench there is one area in each revolution that is a little easier to turn than the rest of the turns. This was done with the plugs out and on a motor stand by the way. I'm getting closer to starting the motor for the first time and I wanted to get some thoughts on this. I personally just thought it was the DOD lifters and nothing major because the motor only has 3500 miles and had no know issues prior to being pulled out for my swap. Would the DOD lifters make it feel a little strange/easier to turn the motor by hand if they have no oil pressure going to them?



  2. #2
    Join Date
    Jun 2010
    Location
    Deployed
    Posts
    3,118
    Country Flag: United States
    Quote Originally Posted by jasonz28camaro View Post
    I have this concern floating around in the back of my mind about my L86 motor. I inspected the valve train and bottom end to the best of my abilities while I had the valve covers and oil pan off. When I go to turn the motor over by hand with a ratchet wrench there is one area in each revolution that is a little easier to turn than the rest of the turns. This was done with the plugs out and on a motor stand by the way. I'm getting closer to starting the motor for the first time and I wanted to get some thoughts on this. I personally just thought it was the DOD lifters and nothing major because the motor only has 3500 miles and had no know issues prior to being pulled out for my swap. Would the DOD lifters make it feel a little strange/easier to turn the motor by hand if they have no oil pressure going to them?

    So the engine is a little tough to turn over, but one little spot is easier? Did it run fine before you pulled it? Personally, if you have no reason to suspect something is wrong I don't see why you would be worried. Now if it was the opposite, really easy to turn and one spot was hard I would suspect like a bent valve. As the engine is building compression it will be a little tough to rotate (easier without plugs), but when valves open you could get a gust of easier to turn.
    1970 Camaro/DSE build


    Are you driver enough? Maybe....come on blue!
    https://www.pro-touring.com/threads/...71#post1147371

  3. #3
    Join Date
    Jul 2017
    Posts
    134
    I purchased the motor used and was told it ran fine, service records and ****** did not show any issues motor related. The area I'm not familiar with is the DOD lifters and wondered if anyone had experience with these and if this was what I'm noticing, maybe the lifter is not functioning due to lack of oil pressure.

    I think I'll go ahead and proceed to get it lined up to be started soon and go from there.

  4. #4
    Join Date
    Jul 2011
    Location
    Nashville/ Tampa
    Posts
    651
    Country Flag: United States
    If you are concerned about a DoD lifter - and they are apparently known to be trash - I'd take this opportunity to pop the heads off and replace them. ~$180 for lifters, gaskets and bolts plus a pretty short period of time in the garage = $$$ worth of peace of mind. Just a thought. I'd think a lack of oil pressure would make the lifter easier to collapse, but I don't know. Mine are in a bucket with the old pushrods and springs waiting to be welded into "art" (junk).
    https://www.instagram.com/gen_v_lt1_chevelle/


    Do not buy anything from Frankie's Used Auto Parts. Ever.
    Chevelle ̶a̶l̶m̶o̶s̶t̶ ̶f̶i̶n̶i̶s̶h̶e̶d̶ L92/200-4r now Gen V LT1 and T56- https://ls1tech.com/forums/conversio...nvertible.html

  5. #5
    Join Date
    Jul 2017
    Posts
    134
    I hear Ya. If i tear apart the motor I’ll be doing a cam at a minimum but would like to do heads too. I plan on changing lifters and take if off the heads one time but don’t have the funds at the moment.