But isn't the severity of the damage dependent upon the math of the motor and large displacement Benz motors are less prone to such a cascade of destruction.
Right?
Math of the motor? I don't know how to answer phrases that lack a sense of precision.
No matter what the size, displacement or the maker of an internal combustion engine, hmm, perhaps this will help
When Mister Piston meets Mr and Mrs Intake Valves and their smaller neighbors, Mr. and Mrs Exhaust valve, bad things happen. Mister piston has the advantage of higher mass and velocity, but can still suffer external damage.
The Cosworth designed head is not known for providing much protection for the valves.
Finally, when the chain snaps and starts spinning in the front timing case cover, there could also be damage to the plastic chain guides, causing debris to end up in the oil channels with the potential to clog the oil pickup.
At the end of the day, any owner that suffers this fate will be lucky if it's just a few valves and pistons. The only way to tell is to drain the oil and coolant, pull the head, carefully inspect and add up the costs.
Vehicle: 1986 190E 2.3-16, 1992 190E 2.3 and 2007 GL450
Location: new york city
Posts: 843
In an interference motor, the valves open farther into the combustion chamber. In a different mathematical set up, valves can be made to open less and never come into contact with the free moving pistons.
Shallower valve travel means less air and less power that can be compensated for by a turbo/super charger or by four valves per cylinder.
A mechincal engineer can provide the formulae for dimensions. I cannot.
As for the 16v I leave it up to you. I do not know how many millimeters the valves project into the combustion chamber. I have no idea what happens to the aluminum piston crowns and the valves in this motor when the chain breaks.
When I spent way more time on cars twenty years ago, I never heard of a single Benz motor popping its timing chain. Now, in these fora, I read in every other thread that someone's timing chain popped and there was a catastrophic destruction of the motor. Especially surprising is the number of 12 cylinder cars that pop their chains.
In an interference motor, the valves open farther into the combustion chamber. In a different mathematical set up, valves can be made to open less and never come into contact with the free moving pistons.
"mathematical set up" = what is generally known as a free running engine
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Shallower valve travel means less air and less power that can be compensated for by a turbo/super charger or by four valves per cylinder.
Doesn't that depend on valve sizing, compression ratio and other design efficiencies?
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A mechincal engineer can provide the formulae for dimensions. I cannot.
For the rest of you knuckle draggers . . . that's one of the accepted plurals of "formula."
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As for the 16v I leave it up to you. I do not know how many millimeters the valves project into the combustion chamber. I have no idea what happens to the aluminum piston crowns and the valves in this motor when the chain breaks.
As owners of 2.3-16's, it's actually very important that we know the effects of neglecting chain tensioners, timing gear cog wear, and the sound of chain rattle on start up should send chills down any owner's spine. There is also a very simple and effective modification that provides additional lubrication to the upper chain area of the timing gear setup.
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When I spent way more time on cars twenty years ago, I never heard of a single Benz motor popping its timing chain. Now, in these fora, I read in every other thread that someone's timing chain popped and there was a catastrophic destruction of the motor. Especially surprising is the number of 12 cylinder cars that pop their chains.
There is a reason why Mercedes went to duplex chains in their cars, particularly with the introduction of the 2.5-16. I would suspect that there was some history of catastrophic timing chain failure that played a part in the redesign.
I suppose this was your long way of saying "right." Right?
And where can we get rebuilt 16v engines? I doubt you can find one fresh for 3k.
The most logical way to acquire a 16v engine is to locate a used engine on a forum such as this or a JY find. Hopefully you will find one that just needs a standard rebuild that doesn't require many new parts. I you plan on purchasing a "rebuilt" 16v engine from a rebuilder you will be in shock at the price. I have seen advertisements for 16v engines, from MBZ rebuilders, with a cost of $6000 + core. I was fortunate to purchase two crate engines a few years back from Germany for apx. $3500.00 each.
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