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On the contrary, I think you got that about right!

I've read some crazy things on this forum. But leaving a cambelt for this length of time is just insane.
agreed. Im blown away at the fact that the belt lasted 20years and that the person never thought of changing it in the 2 decades he has owned it.
 

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agreed. Im blown away at the fact that the belt lasted 20years and that the person never thought of changing it in the 2 decades he has owned it.
Yes normally it's the belt but the tensioner and two idle bearings are also the culprits of cambelt failures on this engine. It has happened that the belt and tensioner are replaced but the two idler bearings miss out on this process and one fails and that's the end of that. As mentioned before, just 'inspecting' the belt is a waste of time.
 

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Discussion Starter #26
Just done a little more work got the old belt off, maybe it's not the original?. No info or details on it at all.
 

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Look up Italia Autos on YouTube. It's some Northern bloke who releases videos for stuff he he works on. Fairly sure he has some detailed Busso V6 videos on there.
 

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Discussion Starter #31
Ye just seen it looks much easier with the engine out. Thinking the belt may have been changed 8 to 10 years ago when it had a major service. Water pump is original so are most of the other parts on the car.
 

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As very rough guide, remove the cam covers... Compare the height of the followers.... If a valve is not closed then the follower will appear depressed in relation to the others.. this is only a rough guide that will indicate that heads will need to removed for inspection
 

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Ye just seen it looks much easier with the engine out. Thinking the belt may have been changed 8 to 10 years ago when it had a major service. Water pump is original so are most of the other parts on the car.
It's a miracle your water pump lasted all this time too!!

The 156 and the V6 are a very, very tight fit. Me thinks the bay was designed to take 4 cylinder engines!! I took one look at the internals and decided to find a good Alfa specialist to work on my own car!!
 

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Discussion Starter #34
Just finishes removing the cam covers and other associated parts. The valves are now visible although they can not be inspected properly until the heads are off, on first inspection they do not look too bad. From what I have seen so far most of the twelve pairs of valve caps are dead equal in height. Two pairs are not so must have bent. I will post some pictures of the heads when there off, tomorrow maybe?. John
 

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I dare say you will find more than a couple bent. The followers being similar height does not give the full picture. You will probably have some valves that have been clipped and bent enough to cause loss of compression but lifter is essentially in normal position.
 

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Discussion Starter #36
Hi can someone tell me how many bolts hold the thermostat housing onto the block and is the housing held firm by O rings?. Thank's John
 

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Discussion Starter #38
More progress today,removed the thermostat housing 'just needed a sharp tap with a piece of wood'. Just removing the fans for more clearance on the front head. Front exhaust manifold studs are off and the head is loose. Will post some pictures of what I find!. John
 

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I would have said go for a 3.0 V6 replacement engine because it is SO much nicer to drive, but you have what sounds like a fantastic original car from new and I would probably keep it that way. Repair the original 2.5 and enjoy many more more miles and smiles!
 
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