Jeep Cherokee 1999 Electronic Service Manual page 1110

X J
SPECI FI CAT I ON S
4.0L ENGINE SPECIFICA TIONS
En g in e D e s c rip tio n
E n gin e Type . . . . . . . . . . . . . . . . . In -lin e 6 Cylin der
Bor e a n d St r oke . 98.4 x 86.69 m m (3.88 x 3.413 in .)
Displa cem en t . . . . . . . . . . . . . . . . . 4.0L (242 cu . in .)
Com pr ession Ra t io . . . . . . . . . . . . . . . . . . . . . . 8.8:1
F ir in g Or der . . . . . . . . . . . . . . . . . . . . 1–5–3–6–2–4
Lu br ica t ion . . . . P r essu r e F eed–F u ll F low F ilt r a t ion
Coolin g Syst em . . Liqu id Cooled–F or ced Cir cu la t ion
Cylin der Block . . . . . . . . . . . . . . . . . . . . . Ca st Ir on
Cr a n ksh a ft . . . . . . . . . . . . . . . . . Ca st Nodu la r Ir on
Cylin der H ea d . . . . . . . . . . . . . . . . . . . . . . Ca st Ir on
Ca m sh a ft . . . . . . . . . . . . . . . . . . . . . . . . . Ca st Ir on
P ist on s . . . . . . . . . . . . . . . . . . . . . . Alu m in u m Alloy
Com bu st ion Ch a m ber . . . . . . . . . . . . . Du a l-Qu en ch
Con n ect in g Rods . . . . . . . . . . . . Ca st Ma llea ble Ir on
Engine Specifications
Ca m s h a ft
H ydr a u lic Ta ppet Clea r a n ce . . . . . . . . . Zer o La sh
Bea r in g Clea r a n ce . . . . . . . . . . 0.025 t o 0.076 m m
B e a rin g J o u rn a l D ia m e te r
No. 1 . . . . . 51.54 t o 51.56 m m (2.029 t o 2.030 in .)
No. 2 . . . . . 51.28 t o 51.31 m m (2.019 t o 2.020 in .)
No. 3 . . . . . 51.03 t o 51.05 m m (2.009 t o 2.010 in .)
No. 4 . . . . . 50.78 t o 50.80 m m (1.999 t o 2.000 in .)
Ba se Cir cle Ru n ou t . . . . . . . . . . . 0.03 m m - m a x.
Va lve Lift . . . . . . . . . . . . . . . 10.29 m m (0.405 in .)
In ta k e Va lv e Tim in g
Open s . . . . . . . . . . . . . . . . . . . . . . . . 12.4° BTDC
Closes . . . . . . . . . . . . . . . . . . . . . . . . 60.9° ABDC
Ex h a u s t Va lv e Tim in g
Open s . . . . . . . . . . . . . . . . . . . . . . . . . 49.8 BBDC
Closes . . . . . . . . . . . . . . . . . . . . . . . . . 29.2° ATDC
Va lve Over la p . . . . . . . . . . . . . . . . . . . . . . . . 41.6°
In t a ke Du r a t ion . . . . . . . . . . . . . . . . . . . . . 253.3°
E xh a u st Du r a t ion . . . . . . . . . . . . . . . . . . . . . 259.°
Cra n k s h a ft
E n d P la y . . . . . . . . . . . . . . . . . 0.038 t o 0.165 m m
Ma in Bea r in g J ou r n a l Dia m et er
No. 1-6 . . . . . . . . . . . . . . . . 63.489 t o 63.502 m m
Ma in Bea r in g J ou r n a l Dia m et er
No. 7 . 63.449 t o 63.487 m m (2.4980 t o 2.4995 in .)
Ma in Bea r in g J ou r n a l Widt h
No. 1 . . . . . 27.58 t o 27.89 m m (1.086 t o 1.098 in .)
Ma in Bea r in g J ou r n a l Widt h
No. 3 . . . . . 32.28 t o 32.33 m m (1.271 t o 1.273 in .)
(0.001 t o 0.003 in .)
(0.001 in . - m a x.)
(0.0015 t o 0.0065 in .)
(2.4996 t o 2.5001 in .)
Ma in Bea r in g J ou r n a l Widt h
No. 2-4-5-6-7 . . . . . . . . . . . . . . 30.02 t o 30.18 m m
Ma in Bea r in g Clea r a n ce . . . . . . . 0.03 t o 0.06 m m
Ma in Bea r in g Clea r a n ce (P r efer r ed) . . . 0.051 m m
Con n ect in g Rod J ou r n a l
Dia m et er . . . 53.17 t o 53.23 m m (2.0934 t o 2.0955
Con n ect in g Rod J ou r n a l
Widt h . . . . 27.18 t o 27.33 m m (1.070 t o 1.076 in .)
Ou t -of-Rou n d (Ma x. All J ou r n a ls) . . . . . 0.013 m m
Ta per (Ma x. – All J ou r n a ls) . . . . . . . . . 0.013 m m
Cy lin d e r B lo c k
Deck H eigh t . . . . . . . . . . . . . 240.03 t o 240.18 m m
Deck Clea r a n ce (Below Block) . . . . . . . . 0.546 m m
Cylin der Bor e Dia m et er —
St a n da r d . . . 98.45 t o 98.48 m m (3.8759 t o 3.8775
Cylin der Bor e Dia m et er —
Ta per (Ma x.) . . . . . . . . . . . . 0.025 m m (0.001 in .)
Cylin der Bor e Dia m et er —
Ou t -of-Rou n d . . . . . . . . . . . . 0.025 m m (0.001 in .)
Ta ppet Bor e Dia m et er . . . . . 23.000 t o 23.025 m m
F la t n ess . . . . . . . . . . . . . . . . 0.03 m m per 25 m m
F la t n ess . . . . . . . . . . . . . . . 0.05 m m per 152 m m
F la t n ess Ma x. . . . . 0.20 m m m a x. for t ot a l len gt h
(0.008 in . m a x. for t ot a l len gt h )
Ma in Bea r in g Bor e
Dia m et er . . . . . . . . . . . . . 68.3514 t o 68.3768 m m
Co n n e c tin g Ro d s
Tot a l Weigh t (Less Bea r in g) . . . 657 t o 665 gr a m s
Len gt h (Cen t er-t o-Cen t er ) . . 155.52 t o 155.62 m m
P ist on P in Bor e Dia m et er . . . . 23.59 t o 23.62 m m
Bor e (Less Bea r in gs) . . . . . . . . 56.08 t o 56.09 m m
Bea r in g Clea r a n ce . . . . . . . . . . 0.025 t o 0.076 m m
Bea r in g Clea r a n ce (P r efer r ed) . 0.044 t o 0.050 m m
Side Clea r a n ce . . . . . . . . . . . . . . 0.25 t o 0.48 m m
4.0L ENGINE 9 - 93
(1.182 t o 1.188 in .)
(0.001 t o 0.0025 in .)
(0.002 in .)
in .)
(0.0005 in .)
(0.0005 in .)
(9.450 t o 9.456 in .)
(0.0215 in .)
in .)
(0.9055 t o 0.9065 in .)
(0.001 in . per 1 in .)
(0.002 in . per 6 in .)
(2.691 t o 2.692 in .)
(23.17 t o 23.45 oz.)
(6.123 t o 6.127 in .)
(0.9288 t o 0.9298 in .)
(2.2080 t o 2.2085 in .)
(0.001 t o 0.003 in .)
(0.0015 t o 0.0020 in .)
(0.010 t o 0.019 in .)