Programed repairs Engines 601, 602, 603 Mechanical IV
Operation no. of operation texts and work units |
05 Hydraulic valve clearance compensating elements
Complaint: Bubbling and ticking noise after starting in idle, particularly on a cold engine. The engine can also shake at the same time. Engines 601, 602, 603 |
Cause/Remedy:
There is air in the oil reservoir chamber on individual hydraulic valve clearance compensating elements. This can change the timing. The residual gas in relevant cylinders is pressed out when the intake valves open and causes the bubbling noise stated.
The ticking noise which occurs to some extent at the same time is produced by contact between the valve tappet and the hydraulic valve clearance compensating element (element is compressed).
Checking hydraulic elements, refer to
Operation no. (05-211).
The modified compensating elements
Part no. 601 589 05 25 can be fitted in the event of repair.
05 Hydraulic valve clearance compensating elements
Complaint: Noises from hydraulic valve clearance compensating elements for short time after starting engine. Engines 601, 602, 603 |
Cause/remedy:
Some of the oil can run out of the hydraulic elements when the engine is started and shut off frequently or after it has remained shut off for a longer period, e.g. over night, resulting in noises for a short time after starting.
Install modified bucket tappets, part no.
601 050 05 25.
These compensating elements have a reduced residual stroke, i.e. the piston stroke (9) and the working chamber (c) have been reduced increasing the size of the reservoir chamber (a).
Less oil is required in the working chamber due to the reduced stroke. For this reason the working chamber refills more quickly when the engine is started.
P05-0175-13
Note
Only improved bucket tappets are now supplied.
Repair note
See RI 05-211 for checking and replacement of the hydraulic valve clearance compensating elements.
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Part Part no.
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Hydraulic valve clearance
compensating element 601 050 05 25
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05 Hydraulic valve clearance compensating elements
Complaint: Ticking noises from valve clearance compensating elements Engine 601.911 |
Cause/remedy:
On these engines ticking noises can occur even with the improved version of the valve clearance compensating elements.
Engines up to October 1984 are affected.
Model | Engine | Engine end. no. | Engine end. no. | Chassis end no. |
201.122 | 601.911 | 028239 | 003360 | A 104824/F 021158 |
Gases can leak into the oil passage for oil supply to the hydraulic valve clearance compensating elements due to settling of the cylinder head gasket.
Replace cylinder head gasket.
05 Timing chain
Complaint: Noises from timing chain drive, rough idle, timing chain jumped Engines 601, 602, 603 |
Cause/remedy:
Worn timing chain
Replace timing chain.
Affected vehicles from February - September 1989
Model | Vehicle ident. end. no. |
|
124 | 943320-091699 | 102455-125313 |
201 | 486234-537850 | 595551-672571 |
05 Timing chain
Complaint: Turbine-type howling from timing chain in lower and medium engine speed range. Engines 601, 602, 603 |
Cause/remedy:
Results from sound transfer from air to solid bodies as timing chain rolls across chain sprockets.
None.
Replacement of chain tensioner, of timing chain or chain sprockets does not help.
05 Timing chain
Complaint: Unusual noises from chain drive Engine 601, 602, 603, 604, 605, 606 |
Cause/remedy:
Engine problems as a result of stretched timing chain.
Vehicles affected: 07/92 up to 04/94
Model | Engine | Vehicle ident end number from to |
124 | 601, 602, 603 605, 606 | B 810470 B 999999 C 000001 C 142875 J 001335 J 049633 F 231885 F 293159 |
140 | 603 | A 092142 A 202313 |
201 | 601, 602 | A 693534 A 716228 G 007363 G 099573 |
202 | 601, 604, 605 | A 000001 A 124468 F 000001 F 099330 |
If the following problems exist, the timing chain must be inspected for stretch:
- Abnormal noises from the chain drive
- Irregular engine running
- Engine does not start easily
- Engine output not in order
- Verified increased oil consumption
Checking
1. Slowly rotate the crankshaft in direction of rotation of engine until the markings of the camshaft and bearing bracket are aligned.
2. Read off the difference in degrees crank angle (°CA) at the crankshaft belt pulley. For engine 604/605/606 see AR 05.20-6010 HA).
a) If difference is 3° to 10° CA, the timing chain should be replaced.
Engine 601/602/603 (RA 05.10-320)
Engine 604/605/606 (AR 05.10-7601 HA)
P05-2206-13
b) Inspect all the teeth of the camshaft sprocket for signs of wear. Crank the engine twice at the crankshaft for this purpose. Specified condition arrow B. If teeth tips are broken off (arrow C), or wear at tooth flanks (arrow A), replace camshaft sprocket and timing device.
Engine 601/602/603 (RA 07.1.1011-240)
Engine 605/606 (AR 07.12-8014 H)
On engine 604 replace camshaft sprocket and drive gear of distributor-type injection pump.
P05-5498-15
3. Difference greater than 10° CA.
a) Inspect engine with inspection lamp and check whether the valves have struck the piston.
b) If impressions of the valve are visible in the piston crown, submit warranty/goodwill inquiry and replace engine, if necessary.
c) If no impressions of the valves are visible on the piston crowns, proceed as stated in 2a
and 2b.
Traces of grinding or wear at the top on the tensioning rail are not a justification for removal.
Parts
Designation | Part number | Engine |
Timing chain | 003 997 48 94 003 997 49 94 | 601, 602, 603 604, 605, 606 |
Operation text and time allowance
Re 2a): Replacing timing chain, see microfilm - Operation text and work units -
Re 2b): Inspecting camshaft sprocket for signs of wear and timing chain for stretch
(cylinder head cover removed)
02-2557/01 Combined work 3 work units or 0.25 hours
Re 2b): Replacing camshaft sprocket and timing device (drive gear of distributor-type
injection pump), see microfilm - Operation text and work units -
Re 3a): Inspecting engine with inspection lamp, see microfilm - Operation text and work units -
Re 3b): Replacing engine, see microfilm - Operation text and work units -
Cost settlement
The cost incurred can be requested through the usual warranty and goodwill channels by stating
Damage Code 0511149.
Documenti citati
- ar0500p2010hw Controllo elementi idraulici regolazione gioco valvola
- ar0500p2011hx Smontaggio, montaggio degli organi di regolazione automatica gioco di funzionamento (punterie idrauliche a bicchiere)
- ar0510p7601ha Sostituzione della catena di distribuzione
- ar0520p6010ha Controllo posizione base alberi a camme
- ar0712p8014h Smontaggio, montaggio variatore di anticipo
- ra0500601ta03x
- ra07016010240x