Standard Procedure - Determining Cylinder Pressure Loss; Removal - Engine Cover - Dodge Sprinter 2006 Manual

9 - 4 ENGINE
NOTE: If the retaining lock is installed, remove it,
rotate engine and install lock once again.
(2) Ca r r y ou t t est of ot h er cylin der s in t h e fir in g
or der of en gin e.
CY LI N DER LEAK DOWN VALU ES
CYLINDER LEAK
DOWN PERMISSIBLE
TOTAL LOSS
CYLINDER LEAK
DOWN PERMISSIBLE
LOSS AT VALVES AND
CYLINDER HEAD
CYLINDER LEAK
DOWN PERMISSIBLE
LOSS AT PISTON AND
RINGS
STANDARD PROCEDURE - DETERMINING CYL-
INDER PRESSURE LOSS
If a n in cr ea sed pr essu r e loss wa s fou n d wit h t h e
cylin der lea k t est , in spect t h e en gin e by list en in g a t
t h e cylin der h ea d ga sket , a ir in t a ke a r ea , exh a u st , oil
fill open in g a n d wh er e in ject or s a n d glow plu gs en t er
t h e cylin der h ea d. Also ch eck t h e en gin e coola n t in
t h e r a dia t or or expa n sion r eser voir for t h e for m a t ion
of bu bbles.
P ossible ca u ses for t h e pr essu r e loss a r e:
POSSI BLE CAU SE FOR PRESSU RE LOSS
CONDITION POSSIBLE
AIR LOSS 1. Sealing Sur-
THROUGH faces
GLOW PLUG,
INJECTOR, AD-
JACENT CYL-
INDERS, OR
AIR BUBBLES
IN COOLANT
2. Gaskets
3. Cylinder
Head Gasket
AIR LOSS 1. Sealing Sur-
THROUGH AIR faces
INTAKE AREA
± 25%
± 10%
± 20%
CORRECTION
CAUSES
Repair Sealing
Surfaces
2. Replace
Component or
Gasket
3. Replace Cyl-
inder Head
Gasket
1. Remove Cyl-
inder Head for
Further Inspec-
tion
CONDITION POSSIBLE
2. Intake
Valves and
Seats
AIR LOSS Sealing Surfac-
THROUGH EX- es
HAUST
2. Exhaust
Valves and
Seats
AIR LOSS 1. Sealing Sur-
THROUGH OIL faces
FILL OPENING
2. Pistons, Pis-
ton Rings
It is possible t o pin poin t t h e pr essu r e loss of t h e
r eleva n t cylin der by spr a yin g wit h clea n en gin e oil.
E n gin e oil sea ls off t h e ga p bet ween t h e pist on a n d
cylin der wa ll br iefly. If a r edu ced pr essu r e loss n ow
occu r s for a sh or t t im e, t h e ca u se is ver y likely t o be
t h e pist on s, pist on r in gs or cylin der con t a ct su r fa ces
of t h e r eleva n t cylin der.
Det er m in in g t h e ca u se ca n be fa lsified by t h e posi-
t ion of t h e pist on r in g join t s. If su spicion exist s t h a t
t h e loss of pr essu r e is ca u sed by t h e pist on r in g
join t s bein g posit ion ed dir ect ly on e a bove t h e ot h er,
fit t h e pa r t s t o t h e en gin e a n d r epea t t h is t est a ft er
r u n n in g t h e en gin e for a sh or t t im e.
REM OVAL

REMOVAL - ENGINE COVER

(1) Rem ove t h e r et a in in g scr ews a n d r em ove cover
(F ig. 2).
CORRECTION
CAUSES
2. Replace
Valves, Guides
or Seats
Remove Cylin-
der Head for
Further Inspec-
tion
2. Replace
Valves, Guides
or Seats
Remove Engine
for Further In-
spection
2. Replace Pis-
tons or Piston
Rings
VA