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(Transverse Section) THE M.G. Series MGA (Twin Cam) ENGINE
A.11 CAMSHAFTS
Remove the camshaft covers and disconnect the camshaft driving sprockets (see Section A.10).
Slacken the camshaft bearing cap nuts a turn at a time to allow the camshaft to rise evenly on the
studs. Commence at the rear bearing and work towards the front. If this is not done the camshaft
thrust flange may cause damage to its housing or the camshaft may suffer distortion or breakage.
Before replacing the camshaft set the crankshaft to 90° B.T.D.C. on No. 1 cylinder to obviate an open
valve fouling a piston crown. Position the camshaft with the timing slots in the cap and shaft
approximately in line. Tighten the bearing cap nuts a turn at a time, commencing with the front
bearing, to fit the camshaft evenly and to prevent the thrust flange fouling the thrust slot. Finally
tighten the nuts to the torque loading figures given in "GENERAL DATA'.
The camshaft bearing caps are marked, and care must be taken to replace them in their correct
positions. After assembly check and adjust the valve timing (Section A.19).
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