Why is my Mercedes 560 timing chain not replacing?
These nylon guides are a well known problem with Mercedes if you do not replace them at their recommended service interval. Most often times it is the left drivers side inboard guide that will become brittle, fracture and then often times fall into the chain path.
How often should timing chain guides be replaced?
When the guide jams up in gears it usually causes serious and catastrophic engine failure that almost always bends the valves on the drivers side head and in real bad cases will even crack the valve cover! From everything I have seen these nylon guides should be replaced every 80,000 miles or every 10-15 years.
When to replace timing chain on Mercedes R107?
The timing chain and the various components (guide rails, tensioning rail, chain tensioner) wear out after 100,000 miles and should be replaced. The sprockets should also be replaced. The chains can stretch but they also wear.
Why do timing belts need to be replaced?
Timing belts are far more susceptible to breaking but chains can stretch leading to other issues. In many examples there are unacceptable degrees of chain slack and worn or broken guides. These need to be replaced. Neglecting the chain can lead to catastrophic results.
These nylon guides are a well known problem with Mercedes if you do not replace them at their recommended service interval. Most often times it is the left drivers side inboard guide that will become brittle, fracture and then often times fall into the chain path.
When the guide jams up in gears it usually causes serious and catastrophic engine failure that almost always bends the valves on the drivers side head and in real bad cases will even crack the valve cover! From everything I have seen these nylon guides should be replaced every 80,000 miles or every 10-15 years.
How to renew the chain in a Mercedes Benz?
The plastic chain guides, sprockets, pins, tensioner and chain can all be renewed through the valve covers, leaving the engine in place. Here is a simple step by step showing my first time through the process that hopefully shows you can do it without error. Loading…
Why are my timing chains breaking on my 450SL?
A chain or chain guide problem is the usual culprit that will destroy these engines. This issue is not exclusive to the 450SL but crosses all engine technology that uses timing chains. Timing belts are far more susceptible to breaking but chains can stretch leading to other issues.
When do I need to replace my timing chain?
Hearing a harsh noise on startup, worn or discolored chain guides, squealing tensioners and a rough-running engine are all signs of needing a timing chain replacement. All the symptoms listed above point to a worn timing chain. Our technicians will recognize faulty sounds, oil contamination and others right away.
The timing chain and the various components (guide rails, tensioning rail, chain tensioner) wear out after 100,000 miles and should be replaced. The sprockets should also be replaced. The chains can stretch but they also wear.
A chain or chain guide problem is the usual culprit that will destroy these engines. This issue is not exclusive to the 450SL but crosses all engine technology that uses timing chains. Timing belts are far more susceptible to breaking but chains can stretch leading to other issues.
Timing belts are far more susceptible to breaking but chains can stretch leading to other issues. In many examples there are unacceptable degrees of chain slack and worn or broken guides. These need to be replaced. Neglecting the chain can lead to catastrophic results.
How do you remove a Mercedes timing guide?
Above you can see the old tensioner guide. You remove it by taking out the 5mm plug on the timing cover and using a magnet to pull the pin while holding on to the guide. Sometimes the pin requires the use of an easy out to remove. Careful there is a washer on that plug you dont want to lose.
Where is the timing chain tensioner located on a Mercedes?
If the balancer is at Zero, and the distributor points to #1 then both left and right camshaft marks should align as shown in the photos above. If this is the case you are now at TDC. Remove the timing chain tensioner located on the right passengers side head held on by 13mm bolts.
What kind of engine does a Mercedes 560 SL have?
These repairs shown are of a 1989 Mercedes Benz 560 SL and are about the same for all 560’s except for little differences with regards to the engine attachments.
If the balancer is at Zero, and the distributor points to #1 then both left and right camshaft marks should align as shown in the photos above. If this is the case you are now at TDC. Remove the timing chain tensioner located on the right passengers side head held on by 13mm bolts.
These repairs shown are of a 1989 Mercedes Benz 560 SL and are about the same for all 560’s except for little differences with regards to the engine attachments.
How to remove timing guide from Mercedes W126?
You remove it by taking out the 5mm plug on the timing cover and using a magnet to pull the pin while holding on to the guide. Sometimes the pin requires the use of an easy out to remove. Careful there is a washer on that plug you dont want to lose.
What should I remove to install a head gasket?
Remove the parts that are connected to the cylinder head. Refer to your car’s service manual for specifics, but in most cases this involves removing the exhaust manifold, the intake manifold, valve cover and drive belts. On many engines, you will need to remove the timing belt or timing chain.
Do you have to replace head gasket every time you replace cylinder head?
Don’t ever re-install a cylinder head that has not been professionally re-surfaced and examined for cracks. Check the service manual for the head bolt specifications to see if the bolts need to be replaced whenever the head gasket is replaced. Some bolts are what is called torque to yield type and would need to be replaced
Can a 3 cylinder head guide be replaced?
For the reasons above many people will just replace the 3 cylinder head guides and “think” everything is fine when in reality, at the very least, one should spend the extra and purchase the “Tensioner guide rail” and also a new tensioner. All three cylinder head guides and tensioner guide rail are replaceable from the top of the engine.
When was the facelift of the Mercedes Benz 560 SEL?
Facelift Mercedes-Benz 560 SEL (V126) From 1973 to 1975, Mercedes-Benz designers worked on the successor to the W116. In December 1975, after several design concepts being presented, the design for the W126 S-Class was approved and frozen in 1976.
The plastic chain guides, sprockets, pins, tensioner and chain can all be renewed through the valve covers, leaving the engine in place. Here is a simple step by step showing my first time through the process that hopefully shows you can do it without error. Loading…
Can a timing chain be replaced on a pushrod car?
In old-style pushrod engines, replacing the timing chain is a fairly easy task. No such luck if you have a modern front-wheel drive car with a transversely-mounted engine, as the space in the engine compartment could be very tight.
How much does it cost to replace a timing chain?
Prices for timing chain replacement may vary anywhere from $370 to $1,500 depending on the vehicle model. If you plan to replace a timing chain yourself, you will need to find the correct procedure to set the timing when a new chain is installed. You can find this type of information in the service manual for your vehicle.
What do you need to know about timing chains?
A timing chain is made of metal, similar to a bicycle chain. Chain guides and silencers are used to keep the timing chain from vibrating. If you plan to replace a timing chain yourself, you will need to find the correct procedure to set the timing when a new chain is installed.
Where are the hash marks on a Mercedes 560?
There should be a small hash mark in the center of the ignition rotor terminal, it should be aligned with a small hash mark in the distributor hosing. You can also use a marker to draw a line too. The distributor must be removed to access and remove the inboard left drivers side rail pins.
How big is a Mercedes Benz distributor screw?
07-11-9-906-128-BOE Appears to be a 4.8mm x 13mm self-tapping screw with a hex head about 8mm across so probably is the one most people are used to. I haven’t measured mine as I seem to always lose one into the engine bay everytime I take the housing cover off.