Alfa Romeo Forum - View Single Post - For your perusal and entertainment - 164 12v vs 916 GTA 24v 3.0 Busso
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(Post Link) post #17 of Old 1 Week Ago Thread Starter
Status: 1 Subaru, 2 Bussos,noAlfa!
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Join Date: Sep 2015
County: Herts
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Subaru Legacy H6

Here's another interesting little factlet - the early 3.0 24v from the 164 has a different water pump housing to the 12v to stop it fouling the oil pump drive pulley on the earlier 24v heads. And since the cambet tensioner is a drastically different design I suspect a 12v tensioner won't bolt on to an early 24v block either. Which suggests there's less parts interchangeability between the early 24v and the late 24v than there is between the late 24v and the 12v....

And here's the proof of the difference between the 12v pump and early 24v pump (12v below):

You can plainly see the greater curve on the left hand side of the 24v's pump, which makes me wonder if the early 24v's waterway on that side has been redesigned too, and then returned to the original layout for the later 24v in the 916 gtv, 156, etc.

Many thanks to gussiegtv off Ebay for that pic

Last edited by mj2k; 1 Week Ago at 23:51.
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