602 New Engine Check List — (Basic Prep)

Questions or Problems contact us at: Ph.: 330-540-7223 or email brad@race-1.com

(all information below is a recommendation from Race-1 not necessarily from GM)


Inspect Cylinders for Debris (bore scope)

Inspect fuel pump pushrod bore for debris and burrs.


Check torque on head bolts — 65ft lbs. (No specific order is necessary)

**special note** the 2 short bolts adjacent to the factory seal bolt should be checked at a reduced torque 63 to 64 ft lbs. recommended.

****CHECK Posi lock threads for low percentage of thread****


Adjust valves and lock the posilocks in the appropriate manner.

Check rear galley plugs above camshaft (1/4” square).

Check galley plug above oil filter (9/16 socket or 1/4" square).

Check head plugs on the side of the heads in between ex. Ports (5/16 square)


Degree balancer and mark desired timing lines—index and stabilize the pointer.


Install oil pressure fitting

Install oil filter adapter and filter



Check oil pan bolts and rear studs for tightness

Check rear seal housing fasteners for tightness

Check Timing cover bolts for tightness


Add silicone sealer to the top of the soft plug that blocks the factory dipstick hole


Check oil drain plug for tightness

Turn the Breathers—shield should be towards the front of the engine.


PRO SERIES PREP >>>> the valve springs can be removed for testing and installed height can be checked and adjusted with shims. (1.700 Min. for 602).

**check specific rules on shims**

Shop Securely:

  • Visa
  • Mastercard
  • Discover
  • PayPal
WSM SSL Comodo Secure Site


//Scalable Solution for custom Out of stock script $( document ).ajaxStop(function() { });