MG midget mark 3 - Engine; Lubrication Checking; Engine Oil Draining; Engine Oil Filling

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ENGINE

LUBRICATION

Checking The level of the oil in the engine sump is indicated by the dipstick (3) on the

Fig. 1 right-hand side of the engine. Maintain the level at the

'MAX

' mark on the

dipstick and never allow it to fall below the

'MIN

mark

. The oil level should

always be checked before a long journey.

The filler

(2) is on the forward end of the rocker cover

and

is provided with a

quick-action cap. The filler cap also incorporates a filter for the crankcase

emission control system.

Draining To drain the engine oil, remove the drain plug (1) located on the right-hand side

at the rear of the sump. This operation should be carried out while the engine

is warm.

Clean the drain plug; check that its copper sealing washer is in a satisfactory

condition, and refit.

Filling Fill the engine with the correct quantity of recommended oil.

Run

the engine

for a short while then allow it to stand for a few minutes before checking the

level with the dipstick.

Oil

filter

The oil filter is a disposable cartridge type.

changing

Fig.

1 To renew, unscrew the cartridge (4) from the filter

head

(5) and discard the

cartridge.

NOTE.

difficulty in unscrewing the cartridge is experienced , consult your

Distributor or Dealer.

DRIVE

BELT

Alternator

Tension. When correctly tensioned , a total deflection of

tin.

(13 mm) under

Fig. 2 moderate

hand

pressure, should be possible at the midway point of the longest

belt

run

between the pulleys.

Adjusting. To adjust the belt tension, slacken the securing bolts

(1)

and

adjusting

link nuts (2), and move the alternator to the required position. Apply any

leverage necessary .to the alternator end bracket (3) only

and

not

to any other

part;

to avoid damaging the drive-end bracket the lever should preferably be

of wood or soft metal. Tighten the bolts and re-check the belt tension.

NOT

OVERTIGHTEN

as this will impose an excess loading on the drive

bearings.

VALVE

ROCKER CLEARANCE

Checking Remove the rocker cover and insert a '012 in. feeler gauge between the valve

Fig. 3 rocker arms

and

valve stems (inset). The gauge should be a sliding fit when the

,-;.:~

I engine

Check each clearance in the following order:

Adjusting Check No. 1 valve with No . 8fully open. Check No. 8 valve with No. 1 fully open.

3 " 6 " 6 3 "

5 4 4 5 "

2 7 7 2 "

Slacken the adjusting screw locknut on the opposite end of the rocker

arm

and

rotate the screw clockwise to reduce the clearance or anti-clockwise to increase it.

Retighten the locknut when the clearance is correct, holding the screw against

rotation with a screwdriver.

Smear the new seal (6) with engine oil and fit it into its groove in the new

cartridge. Screw the cartridge to the filter head using

hand

force only.

Refill the engine with the correct quantity of a recommended lubricant, start

the engine and check for oil leakage.

Fig. 3

H O.

'~"

••

_,.