Stock engine rebuild, parts needed?

Discussion in 'Tech Area' started by Twiffy Hog, May 23, 2011.

  1. Twiffy Hog

    Twiffy Hog New Member

    Joined:
    May 11, 2011
    Messages:
    21
    Likes Received:
    0
    I know I could probably research this on the forum but im on phone and its a huge hassle. So im planning a rebuild on my stock 1975 CT70 engine what do I need besides, engine gaskets and piston rings? Thanks in advance Kyle.
     
  2.  
  3. zoolew

    zoolew Member

    Joined:
    Dec 29, 2009
    Messages:
    82
    Likes Received:
    0
    Get a valve lapper and some lapping compound. It smooths out the valve seal to the head and gives you better compression. Check your rocker arms to see is there is any wear on the contact points too. If your engine has high miles you may want to get a new jug as well.
     
    #2 zoolew, May 23, 2011
    Last edited: May 23, 2011
  4. OLD CT

    OLD CT Well-Known Member

    Joined:
    May 15, 2006
    Messages:
    5,141
    Likes Received:
    1,050
    until you pull the engine apart you really wont know what should be replaced and what can be reused.
     
  5. Backinthedays

    Backinthedays Member

    Joined:
    Feb 27, 2010
    Messages:
    417
    Likes Received:
    7
    Best investment you could make is in a manual. This will also help you in determining what parts you might need.
     
  6. racerx

    racerx Administrator
    Staff Member Administrator

    Joined:
    Jul 10, 2005
    Messages:
    15,383
    Likes Received:
    1,913
    My basic list would include: seals, gaskets, timing chain/rollers/tensioner piston cushion, clutch discs, case screws (including stator & oil spinner), points, condenser, plug. Beyond that basic list, it's as OLD CT stated.

    Bore/hone & O/S piston costs about the same as a new aftermarket jug & piston, or bore-up (85 or 88cc kit). A lot of guys opt for the extra displacement at rebuild time, for that reason. 80-85% of used engines I've run across have worn & leaking intake valves. Worn valves should be replaced and the seats cut, then lapped, for best results.
     
  7. rudaluda

    rudaluda New Member

    Joined:
    May 30, 2011
    Messages:
    1
    Likes Received:
    0
    I agree, the piston costs about the same as a new aftermarket jug & piston but the quality is very important for used engine parts for sale.

    ---------- Post added at 03:47 AM ---------- Previous post was at 03:36 AM ----------

    I agree with OLD CT that we have to tear the engine apart in order to diagnose but as for me, I never hurry to tear it apart because the last time I did that it took me ages to put back everything in place :4:
     
    #6 rudaluda, May 31, 2011
    Last edited: Jun 9, 2011
  8. mechanicmike15

    Joined:
    May 14, 2011
    Messages:
    91
    Likes Received:
    0
    engine rebuild tip

    get some royal purple lube or at least some new fresh out of the bottle oil and lube everything as you go along ESP top end (valves etc). What i suggest doing if you want to clean this engine from grime,oil, build up etc is clean it out with gas. I promise you it removes all the oil + residues/ gunk from the engine.clean with a rag.
     

Share This Page