Lotus TURBO ESPRIT Service Manual page 85

Page 70
SECTION BB
SUPERFICIAL DEFECT REPAIRS
BB 8
-
PIN HOLES OR AIR VOIDS
-
I t i s d i f f i c u l t t o overcome a i r v o i d s and p i n h o l e s when a
hand lay-up r e p a i r
i s c a r r i e d o u t , b u t , a s a l l body components
0
0
a r e h e a t e d t o 82 C (180
F),
t h e maximum s e r v i c e t e m p e r a t u r e ,
b e f o r e p a i n t i n g , t h e s e i m p e r f e c t i o n s w i l l show u p . Any a i r
v o i d s l o c a t e d i n t h i s manner c a n b e opened up from t h e s u r f a c e
and f i l l e d w i t h a s t o p p e r o r f i l l e r .
The a i r v o i d s and p i n h o l e s can b e opened up u s i n g one o r b o t h
of t h e f o l l o w i n g methods:
a ) E n l a r g i n g t h e h o l e by gouging o r ' p i c k i n g - o u t '
b ) D r i l l i n g o r r o u t i n g o u t , l e a v i n g a l a r g e h o l e w i t h n e a r
p a r a l l e l s i d e s .
I f a f t e r r e p a i r i n g p i n h o l e s t h e p a i z t s u r f a c e s i n k s o v e r t h e
r e p a i r , t h i s may have been caused by t h e f i l l e r s h r i n k i n g .
When c e l l u l o s e p a i n t s t o p p e r i s u s e d , o v e r f i l l a s t h i s s t o p p e r
h a s a h i g h r a t e of s h r i n k a g e . D e p r e s s i o n s i n t h e p a i n t s u r f a c e
when u s i n g a p o l y e s t e r s t o p p e r a r e u s u a l l y caused by p a i n t i n g
.
t o o soon a f t e r t h e r e p a i r . T h e r e f o r e , befoi-e r u b b i n g down and
p a i n t i n g make s u r e t h e s t o p p e r h a s c u r e d c o m p l e t e l y , l e a v e f o r
a s l o n g a s p o s s i b l e b e f o r e r u b b i n g down. S e e S e c t i o n BA.
BB 9
-
DISTORTION OR WRINKLING
D i s t o r t i o n o r w r i n k l i n g a r e u s u a l l y caused by e x p o s u r e t o
s e v e r e h e a t . T h i s c a n c a u s e t h e r e s i n t o s o f t e n s l i g h t l y
and i n d o i n g
s o
g i v e way t o any i n b u i l t o r a s s o c i a t e d
stresses.
I n a l l s u c h
cases
t e c h n i c a l a d v i c e s h o u l d be
s o u g h t from L o t u s C a r s L i m i t e d .
Small s p l i t s i n b o n d s , s u c h
as
t h o s e around t h e d o o r c a n
o c c u r and a r e c a u s e d mainly by e x c e s s i v e f l e x i n g o f t h e
p a n e l s o r by v i b r a t i o n ;
t h e s e s h o u l d b e a r r e s t e d b e f o r e