Oil Level; Oil Filter; Not Dry Sump Turbo; Dry Sump Turbo - Lotus TURBO ESPRIT Service Manual

Page
4
SECTION EA
On dry sump Turbo Esprit models a sepemte belt driven o i l pump assembly i s used, fixed
tb the right hand side of the main bearing panel.
The assembly consists of two scavenge pump and a pressure pump a l l mounted on a
common axis and supported by the scavenge manifold.
The two scavenge pump draw o i l out from the sump via the scavenge manifold, one pump
drawing from ducts
1
and 3, the other from duetr
2
and
4.
The oil/air mixture i s pumped
through the o i l cooler and into the o i l tank oil/air seperator. The pressure pump draws
o i l from the tank and feeds i t via a cylinder block passage into the auxiliary housing.
A
pressure relief valve i s incorporated into the scavenge manifold and bleeds o i l back
into the inlet side of the pump on opening.
The auxiliary housing passageways are modified to direct the o i l into the o i l filter, (by-
passing the pump housing) and thehce into the o i l gallery.
All
Esprit models (except early Series
1)
use a 'cross drilled' crankshaft to enable plain
lower main bearing shells to be fitted and increase load capacity.
Oil
Level
NOT
Dry Sump Turbo: Before checking o i l level, allow a full five minutes for o i l to
returh to sump. The correct o i l level i s to the upper mark on the dipstick with the car
on a level surface. Add o i l
i f
netesiary through the filler neck on the inlet camshaft
cover. Do
NOT
overfill. Replace filler ~ a p securely.
The engine o i l should be changed and a new filter fitted at the recommended service
intervals. Sump capacity is listed i n TECHNICAL DATA, and should be drained when
the o i l i s warm and impurities are held i n suspension.
Dry
Sump Turbo: Check the o i l level i n the tank at the right hand side of the engine
bay
WITHIN
TWO
MINUTES
of switchingoff.
Oil
w i l l drain back from the tank into
0
the sump when left standing and
i f
the level
is
checked before the scavenge pumps
have returned this o i l to the tank, overfilling w i l l result.
The o i l should be changed and a new filter fitted at the recommended service intervals.
The tank drain plug i s located i n theright hand rear wheelarch reached after removal
of the road wheel.
Drain the tank when the o i l is warm and impurities are held i n
suspension.
F i l l
the tank with new o i l to the top mark on the dipstick and run the
engine for
2
-
3 minutes at
1500
rpm. Switch off and check level within
2
minutes,
topping up
if
necessary.
Oil
Filter
A
full flow filter of the 'throw-away' canister type, incorporating an anti-drain back
valve, i s screwed onto the rear of the auxil iary housing.