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how to do valve adjustment on 1991 accord lx
RAJ, here is the way the service manual describes it:"
- Valves should be adjusted cold when the cylinder head temperature is less than 100deg F. Adjustment is the same for intake and exhaust valves.
- If pulley bolt broke loose while turning crank, retorque it to 159 lb-ft
Remove Valve cover
Set No. 1 piston at TDC. “UP” mark on the pulley should be at the top., and TDC grooves on the pulley should align with cylinder head surface. The distributor rotor must be pointing toward the No.1 plug wire.
Adjust valves on No.1 cylinder Intake: 0.010+/-0.01 in. Exhaust: 0.012+/- 0.01 in.
Loosen locknut and turn adjustment screw until feeler gauge slides back and forth with slight amount of drag.
Tighten locknut and check clearance again. Repeat adjustment if necessary.
Rotate crankshaft 180deg. counterclockwise (cam pulley turns 90deg.) The “UP” mark should be at exhaust side. Distributor rotor should point to No.3 plug wire. Adjust valves on No.3 Cylinder
Rotate crankshaft 180deg. counterclockwise to bring No.4 piston to TDC. Both TDC grooves are once again visible and distributor rotor points to No.4 plug wire. Adjust valves on No.4 cylinder.
Rotate crankshaft 180deg. counterclockwise to bring No.2 piston to TDC. The “UP” mark should be at the intake side. Distributor rotor should point to No.2 plug wire. Adjust valves on No.2 cylinder
" Hope this helps, good luck
all Honda auto have a sticker under the hood that states on the left side to the bottom that states the specks intake /exhaust/ some are in metric intake 26 mm exhaust 30 mm -or intake .010/exhaust .012 I do like to push mine down 1mm to 25/29 since it has a lot of miles on it Update (08/31/2015)
