Can you adjust valve lash without the engine running? I tried to do it with the engine running but the socket will not stay on the adjusting nut. I just installed a new camshaft.

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1988 GTA 5.7L Auto
SLP Cold Air Intake w/ K&N, fully modified MAF Sensor, TPIS 52mm Throttle Body w/Air Foil, Fully Ported and Polished Plenum, Nikel-plated Ported SLP Siamesed Runners, Ported TPIS Big Mouth Intake Manifold, stock heads w/ 1.52 Comp Cams Self-aligning Roller Rockers, TPIS ZZ-9 Roller Camshaft, TPIS Valve Springs, Cloyes True Double Roller Timing Chain, TPIS Adjustable Fuel Pressure Regulator, Balanced Bosch 22 lb/hr Fuel Injectors, MSD 6AL, Taylor 10mm Wires, Bosch Platinum +4 Spark Plugs, MSD Blaster Coil, March Underdrive Pulleys, 6 3/4" Vibratech Streetdamper, TPIS Level 3 PROM, 160 T-stat, Low Temp. Fan Switch, Stock Distributor w/ Bronze Gear, SLP 1 5/8" Headers, Random Technologies High Flow Cat., Adjustable Borla Cat Back Exhaust, Level 10 PTS-3 700R4 Trans, B&M Holeshot 2400 Stall Converter, B&M Trans Cooler, TCI Aluminum Finned Trans Pan, 3" Balanced Aluminum Driveshaft, 3.73 Richmond Gears, Auburn Pro-Series Differential, LPE Aluminum Differential Cover w/ Main Cap Preloads, BF Goodrich Drag Radials, Hotchkis Lower Control Arms, Hotchkis Panhard Rod, Bilstein Heavy Duty Shocks and Struts, 1LE Springs, Energy Suspension Polyeurethane Bushings, Global West Tubular Subframe Connectors, Global West Steering Box Brace, HP Motorsports 3 Point Strut Tower Brace

 

Hmm, hard to say. Try contacting TPIS yet? They're pretty up on that stuff (yea right).

Good god you have a lot of mods.
You must be in the low 13s. post your et.

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92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,K&N, Crane AFPR (47psi),MSD6AL, Holley 9mm Annihilator wires, Bosch O2sensor, 3:73s,JET fan switch, Macewen white face gauges, Intellitronix Digital Gauges

 

f u formula I know who u are!

 

how u like that formula!!!

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1988 GTA 5.7L Auto
355 ci. block, SLP Cold Air Intake w/ K&N, fully modified MAF Sensor, TPIS 52mm Throttle Body w/Air Foil, Fully Ported and Polished Plenum, Nikel-plated Ported SLP Siamesed Runners, Ported TPIS Big Mouth Intake Manifold, stock heads w/ 1.52 Comp Cams Self-aligning Roller Rockers, TPIS ZZ-9 Roller Camshaft, TPIS Valve Springs, Cloyes True Double Roller Timing Chain, TPIS Adjustable Fuel Pressure Regulator, Balanced Bosch 22 lb/hr Fuel Injectors, MSD 6AL, Taylor 10mm Wires, Bosch Platinum +4 Spark Plugs, MSD Blaster Coil, March Underdrive Pulleys, 6 3/4" Vibratech Streetdamper, TPIS Level 3 PROM, 160 T-stat, Low Temp. Fan Switch, Stock Distributor w/ Bronze Gear, SLP 1 3/4" Headers, Random Technologies High Flow Cat., Adjustable Borla Cat Back Exhaust, Level 10 PTS-3 700R4 Trans, B&M Holeshot 2400 Stall Converter, B&M Trans Cooler, TCI Aluminum Finned Trans Pan, 3" Balanced Aluminum Driveshaft, 3.73 Richmond Gears, Auburn Pro-Series Differential, LPE Aluminum Differential Cover w/ Main Cap Preloads, BF Goodrich Drag Radials, Hotchkis Lower Control Arms, Hotchkis Panhard Rod, Bilstein Heavy Duty Shocks and Struts, 1LE Springs, Energy Suspension Polyeurethane Bushings, Global West Tubular Subframe Connectors, Global West Steering Box Brace, HP Motorsports 3 Point Strut Tower Brace

 

Joe,

Yes, you can adjust valve lash on a cold engine. I always like to do final adjustment on a hot, running engine just to make sure.

With an aftermarket cam with decent lift, you might have to run the adjustment a little on the loose side. The stock specification is to adjust 1/2-1 full turn after the zero lash point. With a cam of over 0.500" lifts, you might want to limit that to 1/2-3/4 turs after zero lash. This will prevent inadvertent lifter pump-up and the deadly piston kissing. But then, I'm just a chicken.

You might have a little trouble keeping anything other than a thin-walled socket on the adjusting nuts when the engine is running, but it can be done. A higher lift cam only makes it worse, since the rockers are pivoting in a longer arc.

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Later,
Vader
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"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0

 

Oh. One more thing. Let's try to keep the insults to a minimum. We don't need to have any more members banned...

Just a reminder.

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Later,
Vader
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"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0

 

Sorry about that Vader.

 

I sent you a file showing the step by step on makig the adjustments.

If I remember correctly, you went to a ZZ9, which is the same cam I'm running. I just hope that your engine was a roller cam engine because the pushrod lengths are difference between a flat tappet cam and a hydraulic roller by a LOT. You'd also need a thrust bumper and Torrington bearing set to control cam movement if you are using a non factory roller cam engine.

Let me know how you make out.

Jake

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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9