Where is the adjuster screw on a Mercedes?
In order to reach the adjusting screw one must first remove the anti-tamper device required on US cars by Federal law. It is in a cast-aluminum tower just in front of the fuel distributor. Although Mercedes requires that it be removed and discarded, and after the adjustments be replaced by a new one, with care it can be re-used.
When do you change the Jetronic mixture in a car?
For California cars, starting in 1988: Press the push button switch on test connector X92 (passenger side, between the two firewalls) for two to four seconds. The LED will flash once, indicating no fault code is stored in the system. Now press the switch again for two to four seconds.
Do you need to remove anti tamper device for Bosch Jetronic mixture adjustment?
The dedicated shade tree mechanic cando it, but needs to be well-informed first. These adjustments are intended to be followed by an actual exhaust gas CO check to ensure legality. In order to reach the adjusting screw one must first remove the anti-tamper device required on US cars by Federal law.
What are the problems with the M103 3.0L engine?
M103 E30 3.0l Engine Problems and Reliability. 1. Unstable engine speed. Bad injector nozzles cause this very often and the common issue. 2. Oil leaks. Oil likes to leak from crankshaft oil seals and the U-shaped front cover gasket. Also, valve stem seals are not very good and can be the reason for high oil consumption.
When did Mercedes Benz stop making the M103 engine?
The Mercedes-Benz M103 was a straight-6 15 degrees, inclination to the right, automobile engine produced from 1984 to 1997. It was a single overhead cam design with 2 valves per cylinder. The M103 was replaced by the M104 starting in 1989.
Is the engine size the same as the M102?
Valves are the same as 2.0-liter M102 (intake valve diameter – 43 mm; exhaust valve diameter – 39 mm). The engine has a mechanical fuel injection, which is very difficult to repair and adjust (KE-Jetronic).
Is there a timing chain on an M103?
There is a single-strand timing chain also. The M103 was wholly taken off from the production in 1993 and replaced by the M104 series 3.0l engine. 1. Unstable engine speed. Bad injector nozzles cause this very often and the common issue. 2. Oil leaks. Oil likes to leak from crankshaft oil seals and the U-shaped front cover gasket.