08-27-2019, 04:22 PM | #1 |
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8ba flat head
how can you tell if it,s a mercury eng with out taking it apart
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08-27-2019, 04:30 PM | #2 |
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Re: 8ba flat head
8CM on the heads would be the first clue....See > https://www.jalopyjournal.com/forum/...athead.341885/
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08-27-2019, 04:31 PM | #3 |
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Re: 8ba flat head
If the engine is a 49-53, then it can be a Ford or a Mercury engine - the blocks are all the same. The factory heads for Mercury were marked 8CM, though people have swapped all sorts of parts back/forth between Ford and Mercury engines.
Unless you pull a head (to manually measure the stroke - assuming the engine can be manually turned over) or pull the pan, no way to know that you have a Mercury 4" stroke crankshaft or not. |
08-27-2019, 05:22 PM | #4 |
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Re: 8ba flat head
Also EAC Mercury heads.
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08-27-2019, 08:40 PM | #5 |
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Re: 8ba flat head
Mercury's used 4-bolt carburetors rather than the three-bolt Holley 94's used on Fords. Heads were more likely swapped, as Ford heads give more compression if installed on the longer stroke Mercury engine, while swapping to a smaller carburetor would be less likely. Plus Mercury manifolds are a lot harder to find than Ford heads.
One other thing that may help is the shape of the brass fitting at the inlet of the oil filter. I put a '51 Merc engine in my '51 Ford a couple of years ago. The Ford engine (which I am sure was original to the car) had a square "blocky-looking" fitting, while the Mercury had a rounded fitting more like a conventional pipe fitting. One last thing; if the engine is out of the car and you can see the oil pump gear cover, it may tell you something. My Ford had a stamped steel cover, while the Mercury had a cast cover. I know a sample size of one is hardly indicative, but this is what I have seen. Last edited by tubman; 08-27-2019 at 08:50 PM. |
08-27-2019, 09:18 PM | #6 |
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Re: 8ba flat head
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