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140 RN automatic engine into 1966 4 speed
Posted by: Matt E. ()
Date: February 08, 2022 05:36PM

I have a known good 140 RN code engine I will be swapping from a 1965 automatic into a 1966 standard shift.I have not made this swap before and I have two questions. First, the swap seems pretty straightforward. Swap bell housings, new gaskets and seals, install pilot bushing, inspect flywheel, PP, clutch plate, T/O bearing etc.Is there anything special I should know or, in your experience would make the task easier? Second, since the engine was meant to be used in an automatic, will it perform on par with a standard shift 140? This question is strictly for my information as I do not have a standard shift 140 to compare it with.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: KenHenry ()
Date: February 08, 2022 05:45PM

If it’s stock it should have the 889 camshaft also used in the 95 hp, but with a special gear to retard the valve timing and move the power band up slightly. It basically has a little less power than a MT 140 but better low end torque. Good luck with the swap! Ken

Ken Henry, Rochester, NY USA
1965 Corvair Corsa
140 hp, 4 speed



Edited 1 time(s). Last edit at 02/08/2022 05:46PM by KenHenry.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: Matt E. ()
Date: February 08, 2022 06:28PM

Thanks, Ken. That is exactly what I was looking for. Long before this swap materialized I seemed to recall a post saying exactly what you reported. I searched, but could not find the thread.I know that the engine has been rebuilt, and I have ran it for several months in a rusty 65 4 door automatic sedan. Lower end torque is preferred for me anyway.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: Jim Stukenborg ()
Date: February 08, 2022 07:04PM

Matt, makes sure to use the longer bolts that mount the flywheel to the crank and not the shorter ones that came with the flex plate for the automatic. Jim

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: cnicol ()
Date: February 08, 2022 07:36PM

I put a RN 140pg engine into a 67 4sp car. It was the best driving Corvair I've ever owned. I highly recommend the combination.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
65 Canadian Monza 4dr 110/PG 40k
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: MtnVairMike ()
Date: February 09, 2022 08:36AM

I'm running that too in my 66.

Very happy with it.


Mike

1966 Monza Convertible, 140HP-4 speed, Ermine White
1969 Monza Convertible, 110HP-PG, Frost Green

Black Mountain,NC

Others in the menagerie...
72 Corvette Stingray, 58K miles, owned since 87
72 MGB, 112K miles, bought from original owner in 09
78 Chevy pickup, 124K miles, bought new in 78
93 Corvette, LT1/6spd, 210K miles, daily driver since 96
02, Chevy Z71, 4x4, 93K miles, my Dad's truck, inherited 2021

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: Matt E. ()
Date: February 09, 2022 09:05AM

Thanks to all for your constructive comments. I would have made the swap regardless, but it's sure nice to know that others have done this swap and are happy with the results.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: Timothy Shortle ()
Date: February 09, 2022 09:07AM

I highly doubt you would notice any difference between an RN engine and a RB or RM engine. And the 65 RN also used the 330 ignition distributor whereas 66 used the 339 distributor.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: 66vairman ()
Date: February 10, 2022 09:38AM

Timothy Shortle Wrote:
-------------------------------------------------------
> I highly doubt you would notice any difference between an RN engine and a RB or RM engine. And the 65 RN also used the 330 ignition distributor whereas 66 used the 339 distributor.

TIM - Good point as the PG and manual transmission distributors have DIFFERENT timing curves in model year 66 per Clark's C7547 booklet.

Craig and Mike - Do you recall which distributor your 140HP PG engine was equipped with?

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: Matt E. ()
Date: February 10, 2022 10:14AM

I will be running one one Seth Emerson's distributors.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: cnicol ()
Date: February 10, 2022 11:07AM

66vairman Wrote:

Craig and Mike - Do you recall which distributor your 140HP PG engine was equipped with?

Mine had a 339 distributor

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
65 Canadian Monza 4dr 110/PG 40k
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: 66vairman ()
Date: February 10, 2022 01:16PM

Thanks for the reply Craig.

I doubt GM would have made the 339 140HP PG distributor if they hadn't found an issue with using the 330 on the 140HP PG engine.

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: MtnVairMike ()
Date: February 11, 2022 10:53AM

66vairman Wrote:
-------------------------------------------------------
> Timothy Shortle Wrote:
> -------------------------------------------------------
> > I highly doubt you would notice any difference between an RN engine and a RB or RM engine. And the 65 RN also used the 330 ignition distributor whereas 66 used the 339 distributor.
>
> TIM - Good point as the PG and manual transmission distributors have DIFFERENT timing curves in model year 66 per Clark's C7547 booklet.
>
> Craig and Mike - Do you recall which distributor your 140HP PG engine was equipped with?


I can't get to that side of the distributor now, maybe later in the garage.
I did get the pn for the vac advance if that helps, 1963610

Thanks Mike

1966 Monza Convertible, 140HP-4 speed, Ermine White
1969 Monza Convertible, 110HP-PG, Frost Green

Black Mountain,NC

Others in the menagerie...
72 Corvette Stingray, 58K miles, owned since 87
72 MGB, 112K miles, bought from original owner in 09
78 Chevy pickup, 124K miles, bought new in 78
93 Corvette, LT1/6spd, 210K miles, daily driver since 96
02, Chevy Z71, 4x4, 93K miles, my Dad's truck, inherited 2021

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Re: 140 RN automatic engine into 1966 4 speed
Posted by: RobertC ()
Date: February 11, 2022 02:35PM

MtnVairMike Wrote:
-------------------------------------------------------
>
> I can't get to that side of the distributor now, maybe later in the garage.
> I did get the pn for the vac advance if that helps, 1963610
>
> Thanks Mike

1963610 is the part number for the rubber boot that covers the vacuum advance arm.

Vacuum advances are identified by a 3 digit number stamped on the arm.

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