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- engine code on the crankcase in question
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Hi Niels
I need to make it clear from the outset that here we are only concerned in European TC variants, not USA versions.
132 AC 4000 is the right engine code for the 8V 1800cc 1973-75 124 CSA.
It would be easy however to take the similar 1973-77 1800cc engine coded 132 AC 1000 and change the 1 to a 4. This is not the case with your unit, I have looked at the photo you sent me. A number 1 has
not been scrubbed out or over-stamped, it was never there.
The 1800 8V CSA crank had 10mm flywheel bolts and the removable alloy alternator lower bracket was secured to the back of the block by two 10mm studs. Please check your block because I cannot see the ex side on the photo you sent, also check the FW bolt holes in the crank.
A code that
could be altered easily to the '4000' - with a small (4) number punch as shown on the photo you sent me is the 1973-1977
1592cc twin cam unit, originally coded
132 AC 000.
Check please (and report back) that the bore size is 84mm. The 1592 was 80mm bore. Unfortunately this check may not be definitive because you can bore out the 1592 (originally 80mm with same 79.2mm stroke as the 1800) to 84mm!
Unfortunately I cannot remember the FW bolts used on the 1592 unit. I think they were 12mm. I cannot remember if the crank nose (seal arrangement) on the CSA 1800 and 1592 was the same, though apart from those differences the cranks are interchangeable. But if your crank has 12mm bolts no way is it genuine 124 CSA 1800.
I think (though as usual I cannot remember - there are so many F/L variants...!) that the CSA and 1592 oil pumps may be different as well, in terms of how they bolt to the underside of the block. I
think the 1592 used a later pump (also used on the Fiat 132 1800 - a saloon car) and they are not interchangeable. There may be a slight difference in the bolting pattern on the sump. I am sorry, I just cannot be sure without corroboration.
The insertion of a small number 4 in front of the three zeros could have been done at the factory on an 1800 block destined for a CSA but since strict homologation was required for that limited production (some 1000 or so) I consider it unlikely.
All in all the crank may be genuine (if not a works-prepped one they were just standard production things, no special markings) and the block may be not so.
The factory 0042411 engine number on the block you've been given? Well, it might just be possible to trace that number thru Fiat, though at the moment I am now sure how.
GC