Technical help required on Peugeot 406 with XFZ engine problem.
I admit I have next to zero knowledge of French engine design, I have enough of British, German, Swedish and Australian auto experience I would have thought to get by, but alas I am stuck.
The 2 photos tell the story, all valves bent and, looking at the witness marks on piston tops in photo of block, the exhaust valves took the brunt.
The problem I have is why? The engine just stopped. Quick leak-down check, air exiting both exhaust and inlet manifolds. The cam belt was still on and intact. A rudimentary alignment showed it was close enough to timing specs. for valves to have survived.
But looking at photo of pinion in its timing location, I expected to find piston of cylinder 1 at TDC or near enough, then looking at the photo of the block (sans head) we see piston No. 1 about half way up to the top. To get the No. 1 piston to the TDC position, the pinion is about 180 deg. out of sync.
I was just going to swap the engine out and put a four cylinder in it. But I am hoping that someone can tell me what is going on with the V6.
Things I have done (Apart from removing front cylinder head and all that entails) I also removed the pinion from crankshaft to make sure the key wasn’t sheared, also I could not see anyway the pinion could have moved (separated) outer in relation to inner.
If the French time the engines differently, just call me a dumbass and I will accept that I have no idea what I am doing with French engines.
I am not stranded, I have other transport and it’s not urgent, I just want to find out what the issue is if possible.
Sorry for the long post, hope you can help enlighten me.
Regards Chris
I admit I have next to zero knowledge of French engine design, I have enough of British, German, Swedish and Australian auto experience I would have thought to get by, but alas I am stuck.
The 2 photos tell the story, all valves bent and, looking at the witness marks on piston tops in photo of block, the exhaust valves took the brunt.
The problem I have is why? The engine just stopped. Quick leak-down check, air exiting both exhaust and inlet manifolds. The cam belt was still on and intact. A rudimentary alignment showed it was close enough to timing specs. for valves to have survived.
But looking at photo of pinion in its timing location, I expected to find piston of cylinder 1 at TDC or near enough, then looking at the photo of the block (sans head) we see piston No. 1 about half way up to the top. To get the No. 1 piston to the TDC position, the pinion is about 180 deg. out of sync.
I was just going to swap the engine out and put a four cylinder in it. But I am hoping that someone can tell me what is going on with the V6.
Things I have done (Apart from removing front cylinder head and all that entails) I also removed the pinion from crankshaft to make sure the key wasn’t sheared, also I could not see anyway the pinion could have moved (separated) outer in relation to inner.
If the French time the engines differently, just call me a dumbass and I will accept that I have no idea what I am doing with French engines.
I am not stranded, I have other transport and it’s not urgent, I just want to find out what the issue is if possible.
Sorry for the long post, hope you can help enlighten me.
Regards Chris
Attachments
Last edited: