What is valve lash?
Supreme Member
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
I'm sure someone can explain it better than me, but I get it started.
It refers to how tight you make the rocker arm to the pushrods. You have to tighten them to the correct valve lash or you could bend or break your rods.
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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
2:73 GEARS
Rebuilt 700R4, with manual valve body
Soon to be installed B&M Megashifter
and Exhaust Cut-Out
It refers to how tight you make the rocker arm to the pushrods. You have to tighten them to the correct valve lash or you could bend or break your rods.
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
2:73 GEARS
Rebuilt 700R4, with manual valve body
Soon to be installed B&M Megashifter
and Exhaust Cut-Out
TGO Supporter
Joined: Aug 1999
Posts: 14,811
Likes: 1
From: Jackson County
valve lash is the clearance between the rocker and the valve. on mechanical lifters you have clearance you set with a feeler gage on hydrolics you tighten the rocker until you have contect between the rocker and valce and then tighten another 1/2 to 3/4 turn (on SBC). some engines don't have an adjustment and others use a differant method to set clearance.
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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM
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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM
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