Renault F4R - Page 289

11A-115
TOP AND FRONT OF ENGINE
Camshaft: Removal - Refitting
K4M
11A
II - OPERATION FOR REMOVAL OF PART
CONCERNED
a Remove:
-the inlet camshaft (1) ,
-the exhaust camshaft (2) .
a Remove:
-the valve rockers (3) ;
-the hydraulic tappets (4) .
REFITTING
I - REFITTING PREPARATION OPERATION
a Refit the camshafts while positioning them correctly
(see Upper engine: Specifications) (Technical
Note 6023A, 10A, Engine and peripherals).
a Always replace the studs of the inlet and exhaust
camshafts if the stud loosens along with the nut of
the inlet or exhaust camshaft (see 11A, Top and
front of engine, Camshaft: Removal - Refitting,
page 11A-114) (Technical Note 3887A, 11A, Top
and front of engine).
a To check if re-priming is necessary, press the top of
the tappet with your thumb. If the tappet piston de-
presses, immerse the tappets in a container full of
diesel then reprime them.
II - REFITTING OPERATION FOR PART
CONCERNED
a Refit:
- the hydraulic thrust bearings,
- the valve rockers,
- the inlet camshaft, by lubricating the inlet camshaft
bearings,
- the exhaust camshaft, by lubricating the exhaust
camshaft bearings.
III - FINAL OPERATION
a Refit:
- the rocker cover (see 11A, Top and front of engi-
ne, Rocker cover: Removal - Refitting, page
11A-88) ,
- the camshaft timing end seals (see 11A, Top and
front of engine, Camshaft seal at timing end:
Removal - Refitting, page 11A-186) .
a Refit:
- the exhaust camshaft pulley.
- the camshaft dephaser (see 11A, Top and front of
engine, Camshaft dephaser: Removal - Refit-
ting, page 11A-177) ,
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14499
Note:
To prevent any risk of unpriming the hydraulic
tappets make sure that they are vertical.
Note:
It is essential to reprime the hydraulic tappets as
these may become drained if removed for a long
time.
K4M, and 858 or 866