Lotus Elise S1 Service Notes page 195

ENGINE
Hydraulic control unit - K16 VVC engines -
dismantling
Hydraulic control unit - K16 VVC engines -
inspection
2
5
12M3495A
1. Suitably identify each solenoid to its fitted
position and note the angle at which it is
positioned relative to the hydraulic control unit
2. Remove nut from sleeve bolt, remove and
discard 'O' ring.
3. Remove outer solenoid, washer and 'O' rings;
discard 'O' rings.
4. Remove inner solenoid.
5. Remove spool valve, remove and discard 'O'
ring from spool valve nut.
6. Remove and discard 4 'O' rings from spool
valve.
7. Withdraw piston and rack assembly.
1. Check piston and spool valve bores in
hydraulic control unit for scoring and corrosion
replace control unit if scoring is evident.
2. Check piston for scoring.
A
NOTE: Light scoring and corrosion may
be removed using grade 600 grade wet or
dry paper which has been soaked in
engine oil for 30 minutes.
3. Check rack teeth for signs of wear or damage,
replace hydraulic control unit if either are
evident.
4. Check control shaft teeth for signs of wear or
damage, replace control shaft if either are
evident.
5. Check that oil passages in spool valve are
clear.
12M3496A
8
8. Remove and discard screw securing piston to
rack, remove and discard piston and seal
assembly.
5 8 OVERHAUL