Why is my timing chain breaking on my Om 642?

Why is my timing chain breaking on my Om 642?

Swirl Flap motors and oil cooler leaks seem to be the most common issues. The reason a chain failure would be an issue, is that when the chain goes, the pistons will hit the valves, diesels are high compression interference engines. A chain breaking would be time to buy a used engine from a salvage yard.

Why is my Mercedes BlueTec timing chain not working?

If the slap is only heard for a few seconds when the tensioner pressure leaks out, then wouldn’t that signal that simply the tensioner needs to be replaced and the chain itself is fine? Also – on my 2011 E350 bluetec there is an annoying metal plate under the oil cap blocking the view of the chain and tensioner.

Why does my Mercedes diesel engine not start?

However, if the engine is not running correctly automatic regeneration will not be started. Some of the possible causes are a faulty temperature sensor, swirl flap motor or EGR valve. Also, make sure you only use approved engine oil. Wrong engine oil can cause excessive soot build up.

Are there timing chain issues in 2011 ML350?

I was considering a 2011 ML350 with 113K miles. It checked out fine except my mechanic “thought” he heard some noise on the cold start. Warned me that he had 2 customers recently with timing chain failures (at 140K) resulting in ruined engines.

What kind of timing kit does a Mercedes Benz use?

Timing tool kit for Mercedes-Benz engine 3.0 BlueTEC, OM642, or CD EXL 2005 – Present. This kit is also used with timing chain Kit 9312A or Mercedes equivalent to replace the timing chain and timing chain guides. You will earn 6 dollars off your next purchase for purchasing this product.

When did the Mercedes 642 timing chain go bad?

Either there was simply a bad run of them around late 2010 to 2011 or, perhaps more likely, the preponderance in the midwest of crappy B20 (20% biodiesel). It could conceivably be a contributing factor by what it leaves on top of the crankcase oil.

What’s the problem with the Mercedes OM642 diesel?

Starting in 2019 the OM642 diesel doesn’t come with an engine oil dipstick. Mercedes puts a cheap oil plug in the dipstick tube that often blows out and sprays oil all over the engine. New Sprinters also have a problem with one of the Power Steering hoses popping off a fitting at the radiator.

When did Mercedes Benz introduce the OM642 BlueTEC?

Mercedes has published information about virtually every problem and the correct solution. The most common problem is the Mechanic didn’t follow the instructions. Mercedes-Benz introduced the OM642 V6 BlueTec diesel in 2007. A few years later they introduced the OM651 4 cylinder BlueTec diesel. BlueTec refers to the type of diesel emission system.

When to replace timing chain on Mercedes B class?

Always when you replace the timing chain Buy the OEM raplacment set. ( Mercedes parts) It usually lasts 300-400k km on a B class. / (Diesel) Yeah it’s not like in old mercedes cars where it lasts for at least 800k km. Alo i think a good practice when doing the chain job to change the water pump, thermostat and a clutch job. ( cause engine is out)

How does a timing chain replacement take place?

The coolant and oil is drained. The water pump, belt and accessories are removed to gain access for the timing chain. Oil pan is lowered. The timing cover is removed and the engine timing marks are aligned. The timing gears, chain and guides are replaced with new ones. The timing cover is reinstalled. The oil pan is reinstalled.

How many timing chains does a Mercedes R350 have?

If t’s Mercedes it’s going to be expensive, regardless of which Mercedes. The R350 I have, of course, benefits from also having THREE timing chains (one master then one to each cylinder bank) to worry about, and of course you would only do all three at once.

Are there timing chain issues on the Om 642?

2015 VW Beetle 1.8l, 2014 For Escape, 2001 BMW R1100S. GONE 2009 ML320, 2001 C230K, 1983 240D Mine is a 2009 with 90k miles on it. I don’t remember ever reading about timing chain problems with the OM 642. Considering they are in Jeeps and Sprinters there are a LOT of them out there.

If the slap is only heard for a few seconds when the tensioner pressure leaks out, then wouldn’t that signal that simply the tensioner needs to be replaced and the chain itself is fine? Also – on my 2011 E350 bluetec there is an annoying metal plate under the oil cap blocking the view of the chain and tensioner.

When do you need to replace timing chain?

I better heed my mechanic’s concerns. If the slap is only heard for a few seconds when the tensioner pressure leaks out, then wouldn’t that signal that simply the tensioner needs to be replaced and the chain itself is fine?

I was considering a 2011 ML350 with 113K miles. It checked out fine except my mechanic “thought” he heard some noise on the cold start. Warned me that he had 2 customers recently with timing chain failures (at 140K) resulting in ruined engines.

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