ACURA TL 1995 Service Repair Manual

Main Bearings

Clearance

1. To check main bearing-to-journal oil clearance,

remove the main caps and bearing halves.

2. Clean each main journal and bearing half with a

clean shop towel.

3. Place one strip of plastigage across each main jour-

nal.

NOTE: If the engine is still in the car when you bolt

the main cap down to check clearance, the weight

of the crankshaft and flywheel will flatten the plasti-

gage further than just the torque on the cap bolt

and give you an incorrect reading. For an accurate

reading, support the crankshaft with a jack under

the counterweights and check only one bearing at a

time.

4. Reinstall the bearings and caps, then torque the

bolts.

1st step: 29 N-m (3.0 kgf-m, 22 Ibf-ft)

Final step: 74 N-m (7.5 kgf-m, 54 Ibf-ft)

NOTE: Do not rotate the crankshaft during inspec-

tion.

5. Remove the caps, and bearings again, and measure

the widest part of the plastigage.

Main Bearing-to-Journal Oil Clearance:

Standard (New): 0.018 - 0.048 mm

(0.0007 - 0.0019 in)

Service Limit: 0.053 mm (0.0021 in)

6. If the plastigage measures too wide or too narrow,

remove the crankshaft, and remove the upper half

of the bearing. '95 and '96 only: Install a new, com-

plete bearing with the same color (select the color

as shown in the right column of this page), and

recheck the clearance.

CAUTION: Do not file, shim, or scrape the bearings

or the caps to adjust clearance.

7. If the plastigage shows the clearance is still incor-

rect, try the next larger or smaller bearing (the color

listed above or below that one), and check again.

NOTE: If the proper clearance cannot be obtained

by using the appropriate larger or smaller bearings,

replace the crankshaft and start over.ProCarManuals.com

Main Bearing s
Selection
CAUTION : I f th e code s ar e indecipherabl e becaus e o f a n
accumulatio n o f dir t an d dust , d o no t scru b the m wit h a
wir e brus h o r scraper . Clea n the m onl y wit h solven t o r
detergent .
Crankshaf t Bor e Cod e Locatio n
Numbers , letters , o r bar s hav e bee n stampe d o n th e en d
o f th e cylinde r bloc k a s a cod e fo r th e siz e o f eac h o f th e
si x mai n journa l bores .
Us e them , an d th e number s o r bar s stampe d o n th e crank -
shaf t (code s fo r mai n journa l size) , t o choos e th e correc t
bearings .
Bearing Identificatio n
Colo r cod e is
o n th e edg e o fthe bearing .
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Main Bearing s
Selection (cont'd )
'97-'9 8 models :
'9 7 - '9 8 models :
NOTE : Whe n usin g bearin g halve s o f differen t color , i t
doe s no t matte r whic h colo r i s use d i n th e to p o r bot -
tom.
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Connecting Rod Bearings

Clearance

1. Remove the connecting rod cap and bearing half.

2. Clean the crankshaft rod journal and bearing half

with a clean shop towel.

3. Place the plastigage across the rod journal.

4. Reinstall the bearing half and cap, and torque the

nuts to 32 N-m (3.3 kgf-m, 24 Ibf-ft).

NOTE: Do not rotate the crankshaft during inspec-

tion.

5. Remove the rod cap and bearing half, and measure

the widest part of the plastigage.

Connecting Rod Bearing-to-Journal Oil Clearance:

Standard (New): 0.015 - 0.043 mm

(0.0006 - 0.0017 in)

Service Limit: 0.05 mm (0.002 in)

PLASTIGAGE STRIP

6. If the plastigage measures too wide or too narrow,

remove the upper half of the bearing, install a new,

complete bearing with the same color code (select

the color as shown in the right column of this page),

and recheck the clearance.

CAUTION: Do not file, shim, or scrape the bearings

or the caps to adjust clearance.

7. If the plastigage shows the clearance is still incor-

rect, try the next larger or smaller bearing (the color

listed above or below that one), and check clear-

ance again.

NOTE: If the proper clearance cannot be obtained

by using the appropriate larger or smaller bearings,

replace the crankshaft and start over.ProCarManuals.com

Selection

CAUTION: If the codes are indecipherable because of

an accumulation of dirt and dust, do not scrub them

with a wire brush or scraper. Clean them only with sol-

vent or detergent.

Connecting Rod Code Location

Numbers or bars have been stamped on the side of each

connecting rod as a code for the size of the big end. Use

it, and the letters or bars stamped on the crank (codes

for rod journal size), to choose the correct bearings.

Bearing Identification

Color code is

on the edge of

the bearing
Half of number is

stamped on bearing

cap and the other

half is stamped on

rod.ProCarManuals.com

Pistons an d
Crankshaf t
Removal
1. Remov e th e se t plate , the n remov e th e oi l pa n inne r
pipe (se e pag e 8-10 ).
2 . Remov e th e oi l pa n assembly .
3 . Remov e th e rea r cover .
DOWE L PI N
REA RCOVE R
O-RIN G
Replac e
4. Remov e th e oi l screen .
5. Remov e th e oi l pump .
OIL SCREE N
GASKE T
Replace .
O-RINGSReplace .
OIL PUM PDOWE LPIN
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Pistons an d Crankshaf t
Removal (cont'd )
6. Remov e th e bolt s an d th e bearin g caps .
CAUTION : T o preven t warpage , unscre w th e bolt s
i n sequenc e 1/ 3 tur n a t a time ; repea t th e sequenc e
unti l al l bolt s ar e loosened .
MAI N BEARIN G CA P BOLT S LOOSENIN G SEQUENC E
7 . Remov e th e ro d caps/bearing s an d mai n caps/bear -
ings . Kee p al l caps/bearing s in order .
8 . Lif t th e crankshaf t ou t o f th e engine , bein g carefu l
no t t o damag e journals . 9
. Remov e th e uppe r bearin g halve s fro m th e connect -
in g rod s an d se t the m asid e wit h thei r respectiv e caps .
10 . Reinstal l th e mai n cap s an d bearing s o n th e engin e
i n prope r order .
11 . I f yo u ca n fee l a ridg e o f meta l o r har d carbo n aroun d
th e to p o f eac h cylinder , remov e i t wit h a ridg e
reamer . Follo w th e reame r manufacturer' s instruc -
tions .
CAUTION : I f th e ridg e is no t removed , i t ma y dam -
ag e th e piston s a s the y ar e pushe d out .
RIDG E REAME R(Commerciall y available )
12. Us e th e woode n handl e o f a hamme r t o driv e th e
piston s out .
HAMME R HANDL E
PISTON
13. Reinstal l th e connectin g ro d bearing s an d cap s afte r
removin g eac h piston/connectin g ro d assembly .
14 . Mar k eac h piston/connectin g ro d assembl y wit h it s
cylinde r numbe r t o avoi d mixu p o n reassembly .
NOTE : Th e existin g numbe r o n th e connectin g ro d
doe s no t indicat e it s positio n i n th e engine , i t indi -
cate s th e ro d bor e size .
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Crankshaft
Inspection
• Clean the crankshaf t oi l passage s wit h pip e cleaner s
or a suitabl e brush .
• Chec k th e keywa y an d threads .
Alignmen t
• Measur e runou t o n al l mai n journal s t o mak e
sur e th e crankshaf t i s no t bent .
• Th e differenc e betwee n measurement s o n eac h
journa l mus t no t b e mor e tha n th e servic e limit .
Crankshaf t Tota l Indicate d Runout :
Standar d (New) : 0.0 3 m m (0.00 1 in ) max .
Servic e Limit : 0.0 4 m m (0.00 2 in )
DIA L INDICATO RRotate tw o complet erevolutions .
Support wit h lathe -type too l o r V-blocks .
Out-of-Roun d an d Tape r
• Measur e out-of-roun d a t th e middl e o f eac h ro d
an d mai n journa l i n tw o places .
• Th e differenc e betwee n measurement s o n eac h
journa l mus t no t b e mor e tha n th e servic e limit .
Journa l Out-of-Round :
Standar d (New) : 0.00 5 m m (0.000 2 in ) max .
Servic e Limit : 0.01 0 m m (0.000 4 in )
Measur e out-of -round a t middle .
Measur e tape rat edges .
• Measur e tape r a t edge s o f eac h ro d an d mai n
journal .
• Th e differenc e betwee n measurement s o n eac h
journa l mus t no t b e mor e tha n th e servic e limit .
Journa l Taper :
Standar d (New) : 0.00 5 m m (0.000 2 in ) max .
Servic e Limit : 0.01 0 m m (0.000 4 in )
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Pistons
Inspectio n
1. Chec k th e pisto n fo r distortio n o r cracks .
NOTE : I f th e cylinde r i s bored , a n oversize d pisto n
mus t b e used .
2. Measur e th e pisto n diamete r a t a poin t 21. 0 m m
(0.8 3 in ) fro m botto m of skir t
NOTE : Ther e ar e tw o standard-siz e piston s (N o let -
te r o r A , an d B) . Th e lette r i s stampe d o n th e to p o f
the piston . Letter s ar e als o stampe d o n th e cylinde r
block a s cylinde r bor e sizes .
Pisto n Diamete r
N o Lette r
(A)
B
Standar d (New )
84.98 0 - 84.99 0 m m
(3.3457-3.346 1 in )
84.97 0 - 84.98 0 m m
(3.345 3 -3.345 7 in ) Servic
e Limi t
84.97 0 m m
(3.345 3 in )
84.96 0 m m
(3.344 9 in )
SKIR T DIAMETE R
21.0 mm(0.8 3 in)
3. Calculat e th e differenc e betwee n th e cylinde r bor e
diamete r show n i n th e righ t colum n an d th e pisto n
diameter .
Piston-to-Bloc k Clearanc e
Standar d (New) : 0.01 0 - 0.04 0 m m
(0.0004-0.001 6 in )
Servic e Limit : 0.0 5 m m (0.00 2 in )
PISTON-TO-CYLINDE RCLEARANCE
Oversize Pisto n Diamete r
0.25 : 85.23 0 - 85.24 0 m m (3.355 5 - 3.355 9 in )
0.50 : 85.48 0 - 85.49 0 m m (3.365 3 - 3.365 7 in )
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Cylinder Bloc k
Inspectio n
1. Measur e wea r an d tape r i n direction s X an d Y at thre e
level s i n eac h cylinde r a s shown .
No. 1 No . 5 CYLINDE R BOR E SIZE S ( A o r I , B or Il )NOTE : T o maintai n prope r pisto nclearance , matc h thes e letter s wit hthe letter s o n th e pistons .
CYLINDE R BOR EGAUG E(Commerciall yavailable)
Cylinder Bor e Siz e
A o r I
B o r I l
Standar d (New )
85.01 0 -85.02 0 m m
(3.346 8 -3.347 2 in )
85.00 0 -85.01 0 m m
(3.346 5 -3.346 8 in )
Servic e Limi t
85.07 0 m m
(3.349 2 in )
85.07 0 m m
(3.349 2 in )
Oversiz e
0.25: 85.25 0 - 85.27 0 m m (3.356 3 - 3.357 1 in )
0.50 : 85.50 0 - 85.52 0 m m (3.366 1 - 3.366 9 in )
Bor e Tape r
Limit : (Differenc e betwee n firs t an d thir d measurement )
0.0 5 m m (0.00 2 in )
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