I just finished putting a cam in my 88 trans am 305 TPI, and I proceeded to adjust the lifters. I Rotated #1 piston @ TDC, adjusted those rockers while twirling the pushrod until drag, and tightening 1 turn. then I rotated the motor 90 deg, and did # 8 cyl, rotated, did # 4 etc, etc. until they were all adjusted. Then, after assembling some other stuff on the motor, I notice that some of the rockers are actually loose. Did the lifters "bleed down" somehow? will they "pump" themselves up after I start the car? BTW I did have the lifters sitting in oil while I installed the cam, etc.
thanks, Jeff
thanks, Jeff
That's normal, they will pump up when you start it.
Supreme Member
The piston is at TDC twice during one complete cycle of the cylinder, only one of which os suitable for setting the valves. Are you sure you had them at the TDC instance that is the firing point, not the point where the exhaust stroke ends and the intake stroke begins?
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"So many Mustangs, so little time..."
ICON Motorsports
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"So many Mustangs, so little time..."
ICON Motorsports
Supreme Member
The engine is at Firing TDC when the rockers on #6 cylinder are moving (one is closing the other is opening).
RB83L69 is correct. With the #1 piston at Firing TDC, you start by ajusting the lash on #1 rockers.
BTW, I turn down the rocker adjustment nut only 1/4 turn past zero lash.
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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 3000 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(40psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.27sec @ 103mph on MT ET Streets
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph
RB83L69 is correct. With the #1 piston at Firing TDC, you start by ajusting the lash on #1 rockers.
BTW, I turn down the rocker adjustment nut only 1/4 turn past zero lash.
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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 3000 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(40psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.27sec @ 103mph on MT ET Streets
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph