Cylinder Head Bolts Inspection - Lotus Elise Service Notes

ENGINE
CYLINDER HEAD BOLTS INSPECTION
1. Retain bolts in fitted order.
2. Wash all bolts, wipe dry and lightly oil threads.
Cylinder head bolts may be re-used provided they
pass one of the following tests.
Test with cylinder head removed
1. Carefully enter cylinder head bolts in their
original fitted location, DO NOT DROP. Screw
each bolt by hand into oil rail.
~ CAUTION: It will be necessary to
/ j \ temporarily remove cylinder liner retainer
clamps 18G 1736 in order to test the bolt
used with the retainer clamp. Retainer clamps
should only be removed one at a time and
replaced immediately bolt test is completed.
Take great care not to rotate crankshaft or
disturb cylinder liners whilst clamps are
removed.
2. Measure distance from cylinder block face to
under bolt head 'A' in illustration:
97 mm or less, bolt may be re-used.
Over 97 mm, new bolt must be used.
Test with oil rail removed
1. Ensuring cylinder head bolts are in their
original fitted location, screw each bolt by hand
into oil rail.
2. If full length of thread is engaged, bolt may be
re-used.
3. If full length of thread is not engaged, measure
distance from top face of oil rail to under bolt
head 'B' in illustration:
378 mm or less, bolt may be re-used.
Over 378 mm, new bolt must be used.
~ CAUTION: A new oil rail must be fitted if a
/ j \ thread is damaged. Thread inserts
(Helicoil) are not acceptable.
7 8 OVERHAUL