1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Starter Shims

Discussion in 'Engine & Performance' started by Scott91370, Jan 27, 2020.

  1. Scott91370

    Scott91370 Full Access Member

    Posts:
    117
    Likes Received:
    64
    Joined:
    Apr 2, 2018
    Location:
    Burleson, Tx
    First Name:
    Scott
    Truck Year:
    1982
    Truck Model:
    Sierra1500
    Engine Size:
    350
    Picked up an 82 last weekend and it's supposed to run but needed a battery - blah blah blah.

    I get it hooked up to power but when I turn the key I get a click from the starter motor engaging the flex plate then a noise like the starter is straining to turn but the engine is not turning. Let go of the key and turn it again, same sounds. Pulled starter and everything, without load, works correctly. Bolted it back in, same results.

    I watched several videos and they all mentioned when grinding that shimming would be needed but I couldn't find out if this would be the same issue. I'm thinking, yes because the starter bendix gear does engage (I climbed under with the inspection plate removed and verified) but the starter cannot spin the engine. Oh yeah, I am able to turn over the engine, with plugs in, with a breaker bar.


    Thanks all!!
     
  2. SirRobyn0

    SirRobyn0 Full Access Member

    Posts:
    111
    Likes Received:
    71
    Joined:
    Dec 6, 2019
    Location:
    In the woods in Western Washington
    First Name:
    Rob
    Truck Year:
    1984
    Truck Model:
    C20
    Engine Size:
    350
    I doubt that's a shim issue. I've run into starters that would no load spin just fine, but were to week to actually turn the engine over. check over the cable to the starter and ground carefully, if your jumping it and the battery is completely toast it could be sucking to much power before it gets to the starter, but if its a new or good battery in there now, and the cables and ends are good stick a new starter in.
     
    WFO, Scott91370 and TubeTruck like this.
  3. Octane

    Octane Full Access Member

    Posts:
    92
    Likes Received:
    88
    Joined:
    Dec 31, 2019
    Location:
    Atlanta
    First Name:
    Eddie
    Truck Year:
    1977
    Truck Model:
    K10
    Engine Size:
    350
    If the starter gear is jammed into the teeth on the flexplate/flywheel tightly shim it out
     
    Scott91370 likes this.
  4. ali_c20

    ali_c20 Full Access Member

    Posts:
    185
    Likes Received:
    179
    Joined:
    Sep 20, 2016
    Location:
    Austria
    First Name:
    Alexander
    Truck Year:
    1974, 1979
    Truck Model:
    C20, K5
    Engine Size:
    350, 350
    I think the starter is gone. My old starter had more and more difficulties to turn the engine before it died. I would also check all ground wires.
     
    Snoots, Arkansas_V8 and Scott91370 like this.
  5. Scott91370

    Scott91370 Full Access Member

    Posts:
    117
    Likes Received:
    64
    Joined:
    Apr 2, 2018
    Location:
    Burleson, Tx
    First Name:
    Scott
    Truck Year:
    1982
    Truck Model:
    Sierra1500
    Engine Size:
    350
    While I don't like to hear the get a new starter comment I am willing to accept it. I am going to try shims first since these things are so easy to work on.
    I will post the results.
     
  6. SirRobyn0

    SirRobyn0 Full Access Member

    Posts:
    111
    Likes Received:
    71
    Joined:
    Dec 6, 2019
    Location:
    In the woods in Western Washington
    First Name:
    Rob
    Truck Year:
    1984
    Truck Model:
    C20
    Engine Size:
    350
    There is always a chance the shims will work, but generally my experience has been if its a shim issue it'll either make noise or won't engage, or is hard to get to engage, but not it engages fine but won't turn the motor. Good luck and let us know what you end up having to do.
     
    WFO and Scott91370 like this.
  7. Scott91370

    Scott91370 Full Access Member

    Posts:
    117
    Likes Received:
    64
    Joined:
    Apr 2, 2018
    Location:
    Burleson, Tx
    First Name:
    Scott
    Truck Year:
    1982
    Truck Model:
    Sierra1500
    Engine Size:
    350
    I measured the space between the starter shaft and the flywheel and it was barely wider than the 1/8" I've been reading about so I did not shim it - go ahead with the I told you so... :banghead: Instead I was reminded by a friend at work that I had another starter sitting in the shop from the other truck. Swapped it in and same issue. My new diagnosis is not enough power from the old battery and even when jumping it it doesn't help. I'm going to get a new battery - need one any way so it's not a waste of $$ - and try again tomorrow. Cold front came in and it's 40* with a constant 10mph north wind.
    I will report back tomorrow.
     
  8. SirRobyn0

    SirRobyn0 Full Access Member

    Posts:
    111
    Likes Received:
    71
    Joined:
    Dec 6, 2019
    Location:
    In the woods in Western Washington
    First Name:
    Rob
    Truck Year:
    1984
    Truck Model:
    C20
    Engine Size:
    350
    Glad to hear your making head way on it at least.
     
    Scott91370 likes this.
  9. Snoots

    Snoots Supporting Member Supporting Member

    Posts:
    4,005
    Likes Received:
    4,972
    Joined:
    Jan 23, 2013
    Location:
    Georgia
    First Name:
    Roger
    Truck Year:
    1973
    Truck Model:
    Jimmy Sierra
    Engine Size:
    350
    When you don't properly align a starter . . .
    Starter Alignment.jpg
     
  10. Scott91370

    Scott91370 Full Access Member

    Posts:
    117
    Likes Received:
    64
    Joined:
    Apr 2, 2018
    Location:
    Burleson, Tx
    First Name:
    Scott
    Truck Year:
    1982
    Truck Model:
    Sierra1500
    Engine Size:
    350
    :eek:
     
  11. Scott91370

    Scott91370 Full Access Member

    Posts:
    117
    Likes Received:
    64
    Joined:
    Apr 2, 2018
    Location:
    Burleson, Tx
    First Name:
    Scott
    Truck Year:
    1982
    Truck Model:
    Sierra1500
    Engine Size:
    350
    Thanks again for all the input! The issue was the battery. Popped in a new one, charged it up and that baby cranks over like crazy. Now to get the dip stick in, change the oil (since I don't know anything about it) and see if she will run!

    :party36::pepper::rockit::pepper::party36:
     

Share This Page