B18806 is the Borsehung number of the tappet & rocker arm repair kit/8 units in a kit,The detailed information is as follows:
Name: tappet & rocker arm repair kit/8 units in a kit
Reference No.:03L109521A+059109417J
Borsehung number:B18806
Series: tappet & rocker arm series
Applicable models of B18806 :
Skoda: FAB 11-15/FABI 09-14/KAR 18-/KOD 17-/OCT 04-18/RAP 13-/RAPI 12-/RO 11-15/SUP 02-15/YET 10-14/
VW: AMA 10-17/AME 17-/ART 17-/BE 12-17/BEC 13-17/CA 11-16/CAMP 10-16/CC 12-17/CR 12-16/EOS 09-16/GOC 12-16/GOLF 07-17/GOPL 09-14/GOSV 14-/IMD 08-/JE 06-15/MA 02-16/PA 09-16/PACC 09-12/PHAE 11-16/PO 10-18/SCI 09-18/SHA 11-16/TIG 08-17/TIGL 18-/
SEAT: AL 11-16/ALT 07-15/ARON 18-/AT 16-/EX 09-14/IB 09-18/LE 06-17/TO 13-16
Audi: A1 11-15/A3 09-17/A3CA 08-17/A4 08-16/ATT 07-15/
What are the functions of tappet and rocker arm?
The tappet transmits thrust of the cam to a push rod or a valve stem, allowing the push rod or the valve to overcome the force of the valve spring and move. It also bears the lateral force exerted by the camshaft during its rotation. It is installed on the cylinder body or on the pilot hole in the cylinder head. It is typically made of nickel/chromium alloy iron castings or chilled alloy iron castings.
The rocker arm serves the main purpose of changing force transmission direction. Acting as a lever, the rocker arm changes the direction of the force from the push rod and transmits it to the end of the valve stem, thus pushing open the valve. The lift of the valve is changed by adjusting the ratio between power arm length and resistance arm length (rocker arm ratio). These two arm parts are typically not equal in length. The arm on the valve side is 30%~50% longer than that on the push rod side. This leads to a higher valve lift.
