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Old 09-28-2021, 04:05 PM   #1
4RD289mT
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Default Flathead engine assessment

I recently bought this '47 that has been partially restored, however the engine (and maybe the trany) need some attention. Since the previous owner passed away the records are not real robust. I need some advice on how to assess the health of the engine and/or what books or websites to look at.
Also, does anyone know about the "made in Canada" and other nomenclature on the engine head? Does anyone know what the numbers mean on the head? Any help would be appreciated. Thanks.
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Old 09-28-2021, 04:18 PM   #2
Jack E/NJ
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Default Re: Flathead engine assessment

>>>the engine (and maybe the trany) need some attention.>>>


Nice. The first bit of attention is finding out if it runs & drives.
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Old 09-28-2021, 04:32 PM   #3
19Fordy
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Default Re: Flathead engine assessment

Before you start dumping tons of money on it, run it and drive it first, to find out any problems. It looks like a nice car. Do the easy stuff first like doing a compression check and making sure brakes are ok. Change the oil when engine is hot and change spark plugs when engine is cold.
Check all fluid levels.
Well done.

Last edited by 19Fordy; 09-28-2021 at 04:44 PM.
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Old 09-28-2021, 04:53 PM   #4
mercman from oz
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Default Re: Flathead engine assessment




1947 Mercury Convertible - very nice choice. Congratulations.
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Old 09-28-2021, 04:57 PM   #5
petehoovie
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Default Re: Flathead engine assessment

Quote:
Originally Posted by 4RD289mT View Post
does anyone know about the "made in Canada" and other nomenclature on the engine head? Does anyone know what the numbers mean on the head? Any help would be appreciated. Thanks.
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Old 09-28-2021, 05:41 PM   #6
Lawrie
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Default Re: Flathead engine assessment

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Those are nice heads, I used them on my 99a engine, good chamber volume.good for fuel economy
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Old 09-28-2021, 06:07 PM   #7
Merc Cruzer
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Default Re: Flathead engine assessment

Do a leak down test, to establish a base line.

Let it set idling and see if it over heats.

Take it out for drive around the neighborhood,and see if there are any issues. If there are none, then try the highway, for high speeds, all the time watching the temperature.

When you get it home from the drives, turn it off and let it set for 10 minutes, then try to start it again.

Enjoy it, you have a nice one!

I can't see where you are located, but try to take it to a car show and talk to people.

Last edited by Merc Cruzer; 09-29-2021 at 05:33 PM.
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Old 09-28-2021, 06:19 PM   #8
mfirth
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Default Re: Flathead engine assessment

THAT IS A GR8 LOOKING MERC !!!!!!! Enjoy it. x 2 on what Merc Cruzer said.
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Old 09-29-2021, 01:51 PM   #9
rotorwrench
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Default Re: Flathead engine assessment

C7RA may be a prefix for a Canadian cylinder head that was designed in 1947 for a C69A type engine. The 7RA seems to denote a truck type head which would likely have a bit less compression but I'm not real familiar with a lot of the Canadian parts. The 1948 truck engines were all of the 8BA family but had a lot of 7RA castings on them here in the US. The cars kept the 59A engines till 1949 here in the US.

Canada made all of their own engines and engine related castings since they had their own foundry. The C59A was the first post war Canadian 239 cid engine but they changed to the C69A engine somewhere in 1946 or 47. It has insert connecting rod bearings which Ford USA didn't use till the 8BA came out in 1948.

If the car has USA origins then it may have had one or both cylinder heads replaced, The Canadian VINs were different that Ford VINs so it should be easy to tell where the car was manufactured.

Last edited by rotorwrench; 09-29-2021 at 02:00 PM.
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Old 09-29-2021, 09:19 PM   #10
GB SISSON
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Default Re: Flathead engine assessment

It's hard to believe that someone would go that far with a Beautiful restoration and not pay close attention to thje engine's innards. As said, do a compression test. Hook up a good quality mechanical oil pressure gauge. The results can't really lie for the internals. Then do a Vacuum test. While I am by no means a professional machanic, I have been working with and studying the vacuum gauge with so many lessons learned in the last few years. And Really, let's just say it needs an engine....... Not cheap, but That's a weekend bolt in. The car itself looks gorgeous. My money says you are fine as is. Do the aforementioned idle/ hi speed tests and take it from there.
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