Compression Check; Camshaft Covers; Turbo - Lotus TURBO ESPRIT Service Manual

Page 6
EA.3.
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COMPRESSION CHECK
SECTION
€A
Warm the engine t9 i t s normal operating temperature. Switch 'off' the engine and
remove a l l sparking plugs. Note: before removing spark plugs ensure that plug
wells are free of any foreign matter. Set throttles to fully open position.
Using proprietary compression testing equipment, place the gauge i n a
convenient position t o be observed and insert the conical-ended rubber tube i n
the No.1 sparking plug orifice. The normal compression pressure with an
engine that has been 'run-in' correctly i s given i n TECHNICAL DATA. A t
altitudes above sed-level, proportionally lower pressures will be obtained.
Compression i s checked with the starter motor turning the engine at
appboximot,ly
200
r.p.m. Battety and starter motor must of course, be in
g o d condition.
Test the iemaitGng cylinders i n a similar manner.
~ e ~ i a c a sparking plugs and re-connect the sparking plug leads.
EAe4.
-
CAMSHAFT COVERS
Three d i f f e r e n t types of camshaft cover have been used:
A l l 907 engines, and n a t u r a l l y aspirated 912 engines p r i o r t o 1986, use
a 'saddle' type cover with
a
curved j o i n t face. When ref
i t ting t h i s type
of cover, i t i s e s s e n t i a l t o use S i l a s t i c RTV 732 on the j o i n t face of
both housing and cover together with a new gasket. D o not overtighten
the f i x i n g s ( s e e Torque loadings) O n some models i t may
be
necessary t o
place the b o l t s i n t o the cover before f i t t i n g t o the engine.
Turbo 910 engines p r i o r t o mid '86 and e a r l y '86 M.Y. Excel engines, use
f l a t type cam
covers with a t h r e e eared f i l l e r cap a t t h e f r o n t of t h e
i n l e t cover. Use Hylomar i f necessary t o r e t a i n the gasket whilst f i t t i n g .
tighten the three s l o t head retaining nuts with t h e i r rubber washers.
U.S.A. Turbo H.C.I. a n d - o t h e r engine v a r i e n t s a t l a t e r d a t e s , use covers
s i m i l a r t o
(2) but with t h e o i l f i l l e r a t the r e a r of the i n l e t cover.
the gaskets on these engines a r e retained by s p i r o l pins and the covers
by socket head screws and
'0'
r i n g s .