1995 ACURA TL Service Repair Manual

Connecting Rod Bearings

Clearance
Selection

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 a plastigage strip across the rod journal.

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

nuts to 44 N-m (4.5 kgf-m, 33 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): 0.022 - 0.046 mm

(0.0009 - 0.0018 in)

Service Limit: 0.05 mm (0.002 in)

PLASTIGAGE STRIP

7.
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.

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.
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

them, and the letters or bars stamped on the crank

(codes for rod journal size), to choose the correct bear-

ings.

Half of number is

stamped on bearing

cap and the other

half is stamped on

connecting rod.

Connecting Rod Journal Code Locations (Letters or Bars)

No. 4 No. 2

No. 1 JOURNAL

(PULLEY END)

Bearing Identification

Color code is on the

edge of the bearing.
No. 6 JOURNAL

(DRIVE PLATE END)

Smaller

rod

journal

NOTE: When using bearing halves of different colors, it

does not matter which color is used in the top or bottom.ProCarManuals.com

Pistons and Crankshaft

Removal

1. Remove the oil pan assembly.

2. Remove the rear cover.

REAR COVER

3. Remove the oil pump.

DOWEL PIN

O-RINGS

Replace.

OIL PUMP

DOWEL PIN

O-RINGS

Replace.
4. If you can feel a ridge of metal or hard carbon around

the top of any cylinder, remove it with a ridge reamer.

Follow reamer manufacturer's instructions.

CAUTION: If the ridge is not removed, it may damage

the pistons as they are pushed out.

RIDGE REAMER

Remove the connecting rod caps after setting the

crank pin at BDC for each cylinder. Remove the pis-

ton assembly by pushing on the connecting rod.

CAUTION: Take care not to damage the crank pin or

cylinder with the connecting rod.

CORRECT

INCORRECT

PISTONProCarManuals.com

Pistons and Crankshaft

Removal (cont'd)

5. Remove the bearing from the cap. Keep all caps/bear-

ings in order.

6. Remove the upper bearing halves from the connect-

ing rods and set them aside with their respective caps.

7. Reinstall the cap on the rod after removing each

piston/connecting rod assembly.

8. To avoid mixup on reassembly, mark each piston/con-

necting rod assembly with its cylinder number.

NOTE: The existing number on the connecting rod

does not indicate its position in the engine, it indicates

the rod bore size.

9. Remove the bearing cap bolts and bearing cap side

bolts, then remove the bearing caps.

MAIN BEARING

CAP

RUBBER

CAP
To help with removal of the caps, install the cap

bolts in the outside bolt holes.

CAP BOLT

MAIN BEARING CAPS

10. Lift the crankshaft out of the cylinder block, being

careful not to damage the journals.

CRANKSHAFT

11. Reinstall the main caps and bearings on the cylin-

der block in proper order.ProCarManuals.com

Crankshaft

Inspection

Clean the crankshaft oil passages with pipe cleaners

or a suitable brush.

Check the keyway and threads.

Alignment

Measure runout on all main journals to make sure the

crankshaft is not bent.

The difference between measurements on each journal

must not be more than the service limit.

Crankshaft Total Runout:

Standard (New): 0.020 mm (0.0008 in) max.

Service Limit: 0.030 mm (0.0012 in)

DIAL INDICATOR

Rotate two complete

revolutions.

Support with lathe-

type tool or V-blocks.
Out-of-Round and Taper

Measure out-of-round at the middle of each rod and

main journal in two places.

The difference between measurements on each journal

must not be more than the service limit.

Journal Out-of-Round:

Standard (New): 0.004 mm (0.0002 in) max.

Service Limit: 0.010 mm (0.0004 in)

Measure out-of-

round at middle.

Measure taper at edges of each rod and main journal.

The difference between measurements on each journal

must not be more than the service limit.

Journal Taper:

Standard (New): 0.005 mm (0.0002 in) max.

Service Limit: 0.010 mm (0.0004 in)
Measure taper

at edges.ProCarManuals.com

Pistons
Inspectio n
1. Chec k th e pisto n fo r distortio n o r cracks .
NOTE : I f cylinde r i s bored , a n oversize d pisto n mus t
b e used .
2 . Measur e pisto n diamete r a t a poin t 17. 0 m m (0.6 7
in) fro m botto m of skirt .
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
th e piston . Letter s ar e als o stampe d o n th e cylinde r
block a s cylinde r bor e sizes .
Piston Diamete r
N o Lette r
(A)
B
Standar d (New )
89.980 - 89.99 0 m m
(3.542 5 -3.542 9 in )
89.970-89.98 0 m m
(3.542 1 -3.542 5 in ) Servic
e Limi t
89.97 0 m m
(3.542 1 in )
89.96 0 mm
(3.541 7 in )
17. 0 mm(0.6 7 in) SKIR T DIAMETE R
3. Calculat e th e differenc e betwee n cylinde r bor e diame -
te r o n pag e 7-1 3 an d pisto n diameter .
Piston-to-Bloc k Clearanc e
Standard (New) : 0.0 2 - 0.0 4 m m
(0.00 1 - 0.00 2 in )
Servic e Limit : 0.0 8 m m (0.00 3 in )
SERVIC E LIMI T0.08 m m (0.00 3 in )
Oversiz e Pisto n Diamete r
0.25 : 90.22 0 - 90.23 0 m m (3.552 0 - 3.552 4 in )
0.50 : 90.47 0 - 90.48 0 m m (3.561 8 - 3.562 2 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 in eac h cylinde r a s shown .
CYLINDE R BOR E SIZE S (A o r I , B or )NOTE : T o maintai n prope r pisto nclearance , matc h thes e letter s wit hthe letter s o n th e pistons . Th e let -ters o n th e bloc k rea d fro m fron t t orear . No . 1 throug h No . 3 cylinder son th e firs t lin e an d No . 4 throug hNo.6 cylinder s o n th e secon d line .
Cylinde r Bor e Siz e
A or I
B o r
Standar d (New )
90.010-90.02 0 m m
(3.543 7 - 3.544 1 in )
90.00 0 -90.01 0 m m
(3.543 3 - 3.543 7 in )
Servic e Limi t
90.07 0 m m
(3.546 1 in )
90.07 0 m m
(3.546 1 in )
Oversiz e
0.25: 90.25 0 - 90.27 0 m m (3.553 1 - 3.553 9 in )
0.50 : 90.50 0 - 90.52 0 m m (3.563 0 - 3.563 8 in )
Bor e Tape r
Limit : (Differenc e betwee n firs t an d thir d measure -
ment ) 0.0 5 m m (0.00 2 in )
I f measurement s i n an y cylinde r ar e beyon d
oversiz e bor e servic e
limit, replac e the cylinde r
block .
I f th e bloc k i s t o b e rebored , refe r t o Pisto n Clear -
anc e Inspectio n (pag e 7-12 ) afte r reboring .
NOTE : Score d o r scratche d cylinde r bore s mus t b e
honed .
Reborin g Limit : 0. 5 m m (0.0 2 in )
2 . Chec k th e to p o f th e cylinde r bloc k fo r warpage .
Measur e alon g th e edge s an d acros s th e cente r a s
shown .
SURFACE S T O B E MEASURE D
Cylinder Bloc k Warpage :
Standar d (New) : 0.0 7 m m (0.00 3 in ) max .
Servic e Limit : 0.1 0 m m (0.00 4 in )
PRECISIO N STRAIGH T EDG E
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Cylinder Bloc k Piston Pin s
Bor e Honin g
2.
3.
4 .
Measur e th e cylinde r bore s a s show n o n pag e 7-13 .
I f th e cylinde r bloc k i s t o b e reused , hon e th e cylin -
der s an d remeasur e th e bores .
Hon e th e cylinde r bore s wit h honin g oi l an d a fin e
(40 0 grit ) ston e in a 60 degre e crosshatc h pattern .
NOTE:
• Us e onl y a rigi d hon e wit h 40 0 gri t o r fine r ston e
suc h a s Sunnen , Ammco , o r equivalent .
• D o no t us e stone s tha t ar e wor n o r broken .
Whe n honin g i s complete , thoroughl y clea n th e
cylinde r bloc k o f al l meta l particles . Was h th e cylin -
de r bore s wit h ho t soap y water , the n dr y an d oi l
the m immediatel y t o preven t rusting .
NOTE : Neve r us e solvent , i t wil l onl y redistribut e
th e gri t o n th e cylinde r walls .
I f scorin g o r scratche s ar e stil l presen t i n th e cylin -
de r bore s afte r honin g t o th e servic e limit , rebor e
th e cylinde r block .
NOTE : Som e ligh t vertica l scorin g an d scratchin g is
acceptabl e i f i t i s no t dee p enoug h t o catc h you r fin -
gernai l an d doe s no t ru n th e ful l lengt h o f th e bore .
CYLINDE R BLOC KCYLINDE R HON E(Commerciall y available )
NOTE:
After honing , clea n th e cylinde r thoroughl y wit h
soap y water .
Onl y score d o r scratche d cylinde r bore s mus t b e
honed .
Remova l
1. Assembl e th e specia l too l a s shown .
PISTON BAS E HEA D07HAF-PL2010 2
PISTON PI N BAS E INSER T07GAF-PH60300
PISTO N BAS E07973-657050 0 PISTO N BAS E SPRIN G07973-6570600
2 . Adjus t th e lengt h o f th e pisto n pi n drive r t o 52. 5 m m
(2.0 7 in ) a s shown .
PISTON PI N DRIVE R HEA D07973-PE0032 0
PISTON PI N DRIVE RSHAFT07973-PE0031 0
PILOT COLLA R07GAF-PH7010 0Embossed mar kfacin g up .
NOTE : Us e hydrauli c press .When pressin g pi n i n o r out ,mak e sur e tha t th e recesse dportion o f th e pisto n align swith th e lip s o n th e collar .
3. Plac e th e pisto n o n th e pisto n bas e an d pres s th e pi n
ou t wit h a hydrauli c press .
ProCarManuals.com

Connecting Rod s
Piston Pin s
Selectio n
Installation
Each ro d fall s int o on e o f fou r toleranc e range s (fro m O to
0.02 4 m m (0.000 9 in) , i n 0.00 6 m m (0.000 2 in ) increments )
dependin g o n th e siz e o f it s bi g en d bore .
It's the n stampe d wit h a numbe r (1 , 2 , 3 o r 4/I , o r
indicatin g th e range . Yo u ma y fin d an y combinatio n
of 1 , 2 , 3 or 4/I , i n an y engine .
Norma l Bor e Size : 57. 0 m m (2.2 4 in )
NOTE :
Referenc e number s o r bar s ar e fo r bi g en d bor e siz e
and d o no t indicat e th e positio n o f th e ro d i n th e
engine .
Inspect eac h connectin g ro d fo r crack s an d hea t dam -
age.
CONNECTIN G RO D BOR EREFERENC E NUMBE R o r BA RHalf o f numbe r i s stampe d o nbearin g cap , th e othe r hal f o nconnectin g rod .
Inspec t bolt s
an d nut s fo r
stres s cracks .
1. Us e a hydrauli c pres s fo r installation .
Whe n pressin g th e pi n i n o r out , b e sur e t o posi -
tio n th e recesse d fla t o n th e pisto n agains t th e
lug s o n th e pisto n bas e head .
The arro w mus t fac e th etimin g bel t sid e o f th eengin e an d th e connectin grod oi l hol e mus t fac e th erigh t sid e o f th e engine .
Assembl e th e ro d an d th episto n wit h th e off-se tmark an d oi l hol e o n th esam e side .OFFSE TMARK
OIL HOL E
PISTO N PI N DRIVE R HEA D07973 - PE0032 0
52.5 mm(2.0 7 in)
Embosse d mar kfacin g up .
Adjus t th e lengt h o f th episto n pi n drive r t o52. 5 mm (2.0 7 in)
PISTO N PI N DRIVE R SHAF T07973 - PE0031 0
PISTON PI N
PILO T COLLA R07GAF-PH7010 0
PISTON PI N BAS E INSER T07GAF-PH6030 0
PISTON BAS E HEA D07HAF-PL2010 2
NOTE: Us e a hydrauli c press . Whe n pressin g th e pi n
i n o r out , mak e sur e tha t th e recesse d portio n o f th e
pisto n align s wit h th e lug s o n th e pisto n bas e head .
ProCarManuals.com