Installation Instructions
Contents
1. DELKRON TOP END INSTALLATION INSTRUCTIONS PART NUMBERS D3300 D3301 D3302 D3303 D3304 D3305 D3310 D3311 D3312 D3313 D3414 D3415 D3062 D3063 D3064 D3065 NOTICE If you are not experienced in engine building or do not feel confident in performing this upgrade STOP and consult an experience engine builder or shop These heads will accommodate up to 640 lift cams but it is the engine builder s responsibility to check all related clearances 1 Valve to valve clearances at TDC openings 2 Valve to piston clearances WARNING Incorrect installation of this kit could result in bodily harm death and or property damage CAUTION Use of adjustable pushrods is strongly recommended when installing these performance kits CAUTION Many issues can result from reusing o rings some of which could be low oil pressure and oil leakage Always use new o rings and make sure they are in the appropriate locations 1 Piston ring end gap Correct piston ring end gap is necessary for proper engine running With cylinders removed from engine and on work bench install piston into bore of cylinder install one compression ring at a time into the top of the cylinder 1 00 below the top of the cylinder bore using the piston to assure that the compression ring is Square to the bore measure end gap Correct top compression ring and secondary compression ring end gap is equal to 004 per inch of cylinder bore2. example 4 125 x 004 0165 of ring end gap Rounding this number to the next highest number is permissible example 0165 rounds to 017 DO NOT round to the next lowest number example 0165 to 016 It is better to be slightly larger with your ring end gap than smaller Insufficient clearance on the compression rings can lead to Ring Abutment at operating temperature while under compression causing irreparable engine damage To achieve correct ring end gap when ring end gap is insufficient too small grinding of the ring ends will be necessary This can be done several different ways File Bench Grinder Ring Grinder Etc but it is recommended that a ring grinding tool be used After grinding of ring be sure to deburr the ring ends prior to re installing them into the cylinder bore It is very important that the ring ends are square when installed into the cylinder bore Ring end gaps that are not square will lead to incorrect ring end gaps that can lead to undesirable engine operation function as well as irreparable engine damage 2 Engine Reassembly and Installation Reassemble cylinders and reinstall them as per your service manual instructions making sure that all parts are thoroughly cleaned prior to reassembly 3 Install Cylinder Heads A Place the head gasket over the dowels B Note that the letter F or R is cast into the top of the cylinder head to ensure proper installation Care
3. fully set the cylinder head over the two dowels in the cylinder head mating surface Be careful not to drag the gasket surface across the dowels CAUTION Thoroughly clean and lubricate the threads of the cylinder head bolts prior to installation Dirt grime and dry interfaces can cause friction resulting in false torque values C Lightly coat the threads and bottom flange of the head bolts with clean light engine oil D Start the head bolts onto the cylinder studs the 2 short bolts on the left side of the engine and the longer bolts on the right side E Tighten the head bolts as per the appropriate service manual CAUTION Improperly tightened cylinder head bolts may result in gasket leaks stud failure and distortion of the cylinder head and or cylinder F Install a new rocker housing gasket on the cylinder head mating surface NOTICE If using OEM stock rocker boxes they must be modified to install the breather channel using the enclosed template as described in the Notice and Caution sheet CAUTION Because of high lift valve spring packs clearance to rocker housings should be checked There should be 025 minimum clearance to spring retainers CAUTION Be careful Rocker housing to cylinder head gaskets can be installed upside down and still have proper bolt hole alignment An upside down gasket will result in an open breather channel which will cause a major oil leak when the engine is started and possibly engine and
4. ify that pushrods spin freely CAUTION Rotating the engine with the valve train loaded can result in bent pushrods or valve damage N O n w If using adjustable pushrods adjust pushrods as per the manufacturer s instructions Install the two breather cover and baffle bolts Alternately tighten bolts to 90 120 in lbs Install a new rocker cover gasket and place rocker cover in position making sure that all the holes are in alignment Apply a small amount of medium strength threadlocker 242 243 blue to the threads of the six rocker cover bolts Start the cover bolts the three short bolts on the left side of the engine three long bolts on the right Torque bolts to 9 12 ft lbs using the pattern shown in the appropriate service manual Finish final assembly as per service manual HAVE FUN THANK YOU FOR CHOOSING DELKRON INC FOR YOUR HIGH PERFORMANCE ENGINE NEEDS
5. or property damage G Verify that the rocker housing gasket is correctly installed by noting that the breather passage is concealed Check hole alignment with cylinder head With the indent facing forward place the rocker housing into position aligning the holes in the housing with the holes in the gasket H Apply a small amount of medium strength threadlocker 242 243 blue to the threads of the six rocker housing bolts Start the rocker housing bolts two long bolts on the left side of the engine four intermediate bolts in the interior Install rocker arm support plate into rocker housing and start the four mounting bolts with flat washers Two short bolts on the left side of engine two long bolts on the right Alternately tighten the rocker housing bolts to 10 14 ft lbs as shown in the appropriate service manual I Install new o ring in the groove around the breather baffle hole in rocker housing A thin film of engine oil is recommended during installation J Install pushrods and pushrod tubes as per service manual Make sure o rings are in place and seated K When installing the rocker arms for the cylinder being serviced both lifters for that cylinder should be on the heel lowest position of the cam L Following the pattern shown in the appropriate service manual alternately tighten each of the four rocker arm support mounting bolts until snug Then following the same numerical sequence torque the bolts to 15 18 ft lbs M Ver
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