Popitinpete
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Hi folks, pretty sure my timing chain snapped yesterday, does this engine have 'fracture/sacraficial' rocker arms? Thanks in advance
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Hi folks, pretty sure my timing chain snapped yesterday, does this engine have 'fracture/sacraficial' rocker arms? Thanks in advance
Hi a couple of spanners in the works, before I go to the trouble of getting the timing cover off, dropping the sump etc to check that 100% it is the chain and it turns out it is the chain the valves and pistons will have collided, that's a given, being as I have to take the egr and hi pressure fuel pump off before I even get to my 3 seized In injectors to get the rocker box off I just need to know if the rockers are sacraficial or not, if they are sacrificial it's worth a go if they are not sacraficial it's not worth it and I will send the car for bake bean tins, thank for your help on this appreciate itIf the chain's broken, you're opening it up anyway... It's only the valve cover to find out...
Short answer is no.
The diesel does have sacrificial rockers. But the broken chain can cause expensive damage. Open it up and see what's going on.
Edit - Checking the cam is a given but you also need to see if the cam chain has chewed anything terminal when it flapped about.
If the chain's broken, you're opening it up anyway... It's only the valve cover to find out...
The 1.3 multijet DOES have sacrificial rockers, but while some people have gotten away with no apparent valve damage it is still the valve that takes the blow from the piston and transfers that force up to the rocker so it is still possible to end up with valve damage.
So yes the rockers are designed to break, but that still does not 100% guarantee the valves are not damaged
The 1.3 multijet DOES have sacrificial rockers, but while some people have gotten away with no apparent valve damage it is still the valve that takes the blow from the piston and transfers that force up to the rocker so it is still possible to end up with valve damage.
So yes the rockers are designed to break, but that still does not 100% guarantee the valves are not damaged
Ah, seized injectors can be fun. Best of luck!
The 16V 1.3 diesel has vertical valves so they will probably survive and the sacrificial rockers will save the rods and crank from damage. Compression tests will prove the matter.
Some folks have reported getting these engines running again after a chain break.
Most of the time, I'd advise that the likely cost involved compared to the value of the car makes repair an uneconomic proposition, but given what you've posted about your skill set, I'd say it's worth a punt.
The issue is a replacement car, to similar value will probably have its own set of problems.
A Fiat/Alfa 1.8/2.0 Twin Cam would almost certainly be toast (assuming rust hadn't already killed the car).