Sticking valve buckets - Alfa Romeo Forum
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(Post Link) post #1 of 4 Old 04-11-15 Thread Starter
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Sticking valve buckets

Ragazzi,

Why do valve buckets stick (TS 1.8)? They seem to be machined just the right size to plonk into the valve well.. and apart from there are two different types.. all seem to be the same size. Yet I have two sticking on no.1 exhaust and probably knackered valves as a consequence..


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Is it the buckets, or actually the valves sticking in their guides? Rust might do that if the engine has stood for a while with those valves open (to the atmosphere via the exhaust).
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It's definitely the buckets... though I dunno if the valves have stuck to them rather the buckets themselves are seized.

My car had a head rebuild (new valves) following a water pump failure (and consequent cam-belt armageddon).

I rebuilt it all (other than fitting the new valves in the old head) and now it's failed again. The exhaust valves on No.1 (with the sticky buckets) seems to be the obvious candidate. I dunno if the valve stems have just been pushed into the buckets... all the other buckets lifted off easily but these two won't budge or rotate.

Head off will tell me for sure.. but I'm wondering if I could have done anything different (matched buckets to port etc.)

Ralf S.

No bullets for Chaingun..
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If it happened while the engine was running, I can't see both number 1 valves/buckets sticking at the same time. Probably the timing went out, belt teeth stripped/cam moved in sprocket etc, and the valve/bucket damage happened as a consequence of that.

Sorry: no good news for you here: you have the bottom end to worry about too: https://www.alfaowner.com/Forum/alfa-...nt-valves.html
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