F134 Engine serial number - can't identify

[51jeeper]

I have a CJ3a that has an F134 Hurricane engine. The serial number on the engine (above the water pump) is 1T57638. I can't find any info decoding this number. I think it might be a truck engine maybe???.

I've looked all over the internet and cannot find any info regarding the '1T' designation as most engine numbers are 4Jxxxx.

Anyone got some insights?
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[Posi]

1T = Factory rebuilt engine.



I went through the same thing several years ago.


I had the same 1T serial # on my 54 3b. It was a factory rebuilt engine so the likely conclusion was the factory reassigned a new serial #.

 

[thiswontbetooexpensive]

Yet another great reason to be a member of this forum. YEARS of experience gained and shared!


This won't be too expensive Dear! That's what I keep saying. Over and over again.

 

[mtnwhlr]

 

[51jeeper]

Posi =

That's awesome! Thanks for clearing that up. That's one of those things I go all OCD on...got to know what that number means! I've been chasing that for a while.

Where did you find that info? Is there any way to figure out when the rebuild took place?

The engine runs well and doesn't smoke, so I don't expect to have to do much to it....other than getting it to fit under the CJ3a hood!

Then there's the other tings I want to chase down, such as when was it originally made. I think it's an early F134 Hurricane as it doesn't have a PCV system, just a breather on top of the valve case cover with a filter and a tube off the driver's side of the engine that creates a negative draft. It's painted blue - maybe another clue to being rebuilt? Who knows...

Thanks again!

 

[Posi]

OK, I was going off memory last night and thought my F-134 serial # started with 1T. However, my F-134 was rebuilt and the 4J was removed and replace with the prefix BF along with the original serial #.

This is what I have in my notes

All CJ F-134 engines prior to 1967 had the prefix 4J plus serial #

Military M38a1 would have a prefix of MD then serial #

First digit = market
M = military
E = export
D = domestic

Second digit = year
R = 1969
S = 1970
T = 1971

Third digit = engine
F = F4-134

Fourth thru sixth digit = Day of year built, plus change if any

Seventh thru eighth digit = undersize rods-mains/oversize bores
(only present if applicable to other than standard)

Ninth digit = replacement value using factory engine
S = service engine
R = short block

Tenth and eleventh = compression ratio
60 = 6.0 to 1
63 = 6.3 to 1
67 = 6.7 to 1
71 = 7.1 to 1


After 1950 the pickup prefixes were changed from 4J to 1P or 1T plus serial number.

What you have is a F-134 from a pickup. According to your serial # it looks to be 1954

Sorry for the confusion, hope this new info helps.

 

[Sasquach]

Are you sure it's a F134 Hurricane ? 3a's did not come with the F head engine being a low hood design, The 3B was the first Jeep to use the F134 Hurricane overhead intake valve engine and prior Jeep's used the L head engine that is a flat head design.

 

[Posi]

Are you sure it's a F134 Hurricane ? 3a's did not come with the F head engine being a low hood design,

The engine runs well and doesn't smoke, so I don't expect to have to do much to it....other than getting it to fit under the CJ3a hood!

He'll have to go with the hood bump typical of 2a and 3a that swap in the f-heads.

 

[51jeeper]

Oh, yes, it is definitely an F134 Hurricane . The PO had done what Sasquach said and use a bump-out for the tall Carter carb. Their solution however, was to cut a hole in the hood and invert an oil pan from some other engine lying around (pic 1). "That's some mighty fine engineering there, Lou."

What I am doing to solve that issue is that I learned that a Holley 1904 carb from a '61 Falcon will fit the block and is a short enough profile to fit under the 3a hood line. Runs like a champ!. That will leave me about an inch and a half for the air intake which I still got to get to (pic 2). Of course this engine causes issues such as manufacturing the throttle linkage and so forth, but that's part of the fun!

I've been on a 3a forum for a while dealing with the rest of the jeep as it's all 3a. The engine is the odd man out here. So I thought I'd haunt this forum for info regarding the F134 Hurricane .

Pic 1


Pic 2

 

[mtnwhlr]

A oil pan on the hood now thats a new one.

 

[thiswontbetooexpensive]

I guess it would be more functional than leaving it open......


This won't be too expensive Dear! That's what I keep saying. Over and over again.