Checks And Measurements; Side Housing - Mazda RX-7 Service Manual

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The first location is referred to as
t h e v e r t i c a l - t y p e , w i t h t h e o i l c o o l -
e r m o u n t e d i n f r o n t o f t h e r a d i a t o r
a n d a t t a c h e d t o t h e r a d i a t o r s u p -
port brackets with rubber mounts.
The second location is referred to
a s t h e h o r i z o n t a l - t y p e a n d i s s u -
perior to the vertical-type, as it
effectively lowers the oil tempera-
t u r e b y a p p r o x i m a t e l y 1 8 ' F ( 1 0 '
c).
( 1 ) T h e i n s t a l l a t i o n o f t h e o i l c o o l -
er in the horizontal location
r e q u i r e s f a b r i c a t i o n o f m o u n t -
i n g b r a c k e t s a s s h o w n i n t h e
i l l u s t r a t i o n .
( 2 ) l n s t a l l t h e b r a c k e t s b y u t i l i z -
i n g t h e b u m p e r b r a c k e t b o l t s ,
a s s h o w n i n t h e i l l u s t r a t i o n .
Brackets
O i l c o o l e r
N o t e : A l l d i m e n s l o n s a r e i n m m .
C hec ks a n d M e a su re me n t s .
A. Side housing.
1 . C h e c k s ( t o b e d o n e b e f o r e c l e a n -
i n g ) '
( 1 ) I n t h e a r e a w h e r e t h e s i d e
h o u s i n g c o n t a c t s a n d m a t e s
w i t h l h e r o t o r h o u s i n g , c h e c k
a l l a r o u n d t h e c o o l a n t P a s -
s a g e s f o r s i g n s o f c o o l a n t o r
gas leakage or surface abra-
s i o n .
( 2 ) O n t h e r u b b i n g s u r f a c e , c h e c k
f o r e x c e s s i v e w e a r o r s c u f f i n g
on or in the paths traced bY
the rotor seals.
2 . C l e a n i n g .
Clean off any surface dePosits
w i t h M E K o r p a i n t t h i n n e r . l f t h e
d e p o s i t s a r e r e s i s t a n t t o c l e a n i n g
w i t h e i t h e r o f t h e s e s o l v e n t s , u s e
#400-#600 sandpaper wetted with
o i l .
3 . M e a s u r e m e n t s .
(1) Surface flatness (side housing
d i s t o r t i o n ) .
a) To check surface flatness
u s e a n a c c u r a t e s t r a i g h t
e d g e a n d a s e t o f f e e l e r
g a u g e s .
b ) C h e c k t h e s u r f a c e i n t h e
f o u r l o c a t i o n s s h o w n i n
F i g u r e 1 . T h e l i m i t f o r d i s -
t o r t i o n i s 0 . 0 4 m m , a n d i f
t h i s l i m i t i s e x c e e d e d a t
a n y p o i n t , t h e s i d e h o u s i n g
m u s t b e r e p l a c e d .
Stepped wear from side seal.
a) To check the side seal wear,
u s e a d i a l i n d i c a t o r w i t h a
sharp tip and a suitable dial
indicator stand, and ch'eck
a s s h o w n i n F i g u r e 2 .
1 .
2.
- -
I
p
I
_Y_ _
(2)
I
60 >l
t*
r l'f
t ,
a
i
:
t
n ' I
I t
!
b) The allowable limit for wear
i s 0 . 1 m m , a n d i f t h i s l i m i t
i s e x c e e d e d , t h e s i d e h o u s -
i n g m u s t b e r e p l a c e d .
Bumper mounting bracket holes
O i l c o o l e r
1
o
\
6
2oaq
' u
li @
o
B
o
&
o o o 4
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Figure 1
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Figure 2
ENGINE
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