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Thread: Tune & Log. Gen VI CBB 1999 Vortec 7400

  1. #261
    Alright... got the following clearances on the mains:
    #1 - 0.0017" - (Spec says 0.0017" - 0.0030") - Can you split sizes on mains? I was considering 0.0010" extra clearance, half (0.0005") for the upper bearing here ( for 0.0022")?
    #2 - 0.0015" - (Spec says 0.0011" - 0.0024")
    #3 - 0.0016" - (Spec says 0.0011" - 0.0024")
    #4 - 0.0015" - (Spec says 0.0011" - 0.0024")
    #5 - 0.0020" - (Spec says 0.0025" - 0.0038") - Ordered 0.001" extra clearance to get to 0.0030" as per factory manual
    Last edited by oldpartsnrust; 3 Weeks Ago at 05:44 PM.

  2. #262
    Got new extra clearance bearings for rods and undersized for crank mains. This would go a lot quicker without my day job, kid's activities, hospitalization, blood clots AND recent covid!!!!

    #1 - 0.0022" - (Spec says 0.0017" - 0.0030")
    #2 - 0.0015" - (Spec says 0.0011" - 0.0024")
    #3 - 0.0016" - (Spec says 0.0011" - 0.0024")
    #4 - 0.0015" - (Spec says 0.0011" - 0.0024")
    #5 - 0.0032" - (Spec says 0.0025" - 0.0038")

    Ship it! Cam going in shortly...
    Last edited by oldpartsnrust; 2 Weeks Ago at 05:32 PM.

  3. #263
    Cam is in, crank is in and torqued to spec (105 Ft/Lb) in 3 stages. I also installed the #5 cap o-ring and put a touch of sealer at the edge where the cap ends at the rear main as well. Crank Rotates really nice. Same with the Cam. Cleaning up the cam parts and timing chain/gear and should be installing tomorrow. Then Rods! I can see the light at the end of the tunnel!.

  4. #264
    My daughter hit a curb with the car, still learning how to drive, and learning IN A MANUAL! Had to go swap a tire and didn't get to the build last night, then worked tonight... Time. If anyone figures out how to manufacture it they will be set!

  5. #265
    I hope I live long enough to actually finish getting this thing back together, running and tuned! Icing in the cake would be a successful run from PA to NY towing some stuff! I am going to try to get the pistons in this weekend, connecting rod bearing clearances measured and adjusted, and the deck clearance measured so I can verify the correct head gasket and then start the 'don't have to measure everything and can just start bolting crap together portion till I get to the valvetrain geometry...

  6. #266
    Senior Tuner
    Join Date
    Mar 2022
    Location
    Indiana
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    Looking forward to it, too.

  7. #267
    Tuner in Training
    Join Date
    Jul 2023
    Posts
    11
    color scheem of the motor says it meant to be

  8. #268
    Senior Tuner
    Join Date
    Mar 2022
    Location
    Indiana
    Posts
    3,573
    Yeah it's pretty cool isn't it?