Hi to all,

I am interested to know from the perspective of a tech what exactly occurs when the timing chain breaks in a 1992 300D 2.5 T . Is the damage often limited to bent valves or is it likely to find head or even piston damage ?

thankyou one and all

If you're looking at buying a car that lost the timing chain, there's no way to know the damage without scoping the cylinders or pulling the head.

If it occurred at idle, maybe nothing to bent valves. Maybe more. At higher RPM in gear where the car will continue to spin the engine? Many things including a valve head snapping and rattling around the combustion chamber and damaging the piston/head. Possibly also cam damage?

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- Jeff

Bent valves would mean piston head contact as well, ring damage if anything got loose.

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It can also take out the timing cover

In simple terms, piston comes up the cylinder while valves are still down, collision, then if piston is damaged rings may have broken & gouge bore. Not a nice thing at all. Best solution is a replacement motor, use the old one as a boat anchor !!

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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
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