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1952 M38 - Mercruiser 3.0, SM465, Dana 18, Build |
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BD1 
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Joined: 18 Dec. 2019 Location: Maine Status: Offline Points: 630 |
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 Posted: 12 May 2022 at 7:54pm |
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My 153 came out of a 68 Chevy II so it has a stock 153 tooth flywheel with a 20” clutch and the smaller bell housing with the tin inspection cover on the bottom. I haven’t had the flywheel off but it looks fairly heavy as it doesn’t appear to be relieved on the back side
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BD
'47 CJ2a, Shiny on top! '55 CJ5 project |
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dasvis
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Posted: 12 May 2022 at 11:09pm |
A 20" clutch? Not likely.......
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1947 CJ2A #88659 "Rat Patrol"
1953 CJ3A #453-GB1 11266 "Black Beauty" 1964 Thunderbird convertible ..... & one of them moves under it's own power!! |
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otto
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Joined: 26 Feb. 2012 Location: Orygun Status: Offline Points: 2267 |
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Posted: 12 May 2022 at 11:35pm |
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A 20" might be a little big; I'm running a 10 1/2" clutch.
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47 CJ2A w/fuel injected boat engine
48 CJ2A 64 Ford Econoline Travelwagon If you can't get there in a Jeep, get a motorcycle! |
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BD1
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Joined: 18 Dec. 2019 Location: Maine Status: Offline Points: 630 |
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Posted: 13 May 2022 at 9:30pm |
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Yep, typo. 10" clutch.
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BD
'47 CJ2a, Shiny on top! '55 CJ5 project |
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 25 June 2022 at 7:46am |
   I got the mercruiser running, 155-160psi all cylinders with a smooth idle. After pulling the oil pan to check on the internals I found a piece of piston in the pan, so full teardown and off to the machine shop.
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1952 M38-CDN
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 25 June 2022 at 7:54am |
  A few weeks later back from the machine shop. -0.020" overbore -new pistons -std rods and mains -new cam bearings -surfaced block, head and flywheel -polished crank
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1952 M38-CDN
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 25 June 2022 at 7:57am |
 Crank installed
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1952 M38-CDN
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Noah
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Posted: 25 June 2022 at 8:01am |
  The valves and seats are in good shape so I just cleaned up the sealing surfaces with some valve lapping compound.
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1952 M38-CDN
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otto
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Joined: 26 Feb. 2012 Location: Orygun Status: Offline Points: 2267 |
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Posted: 25 June 2022 at 10:28am |
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You stated the engine was running- did you settle on manifolds? Or was it running on the boat stuff? It appears that your engine has the larger port cyl head.
Engine looks great, should last forever now. Glad you caught the broken piston.
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47 CJ2A w/fuel injected boat engine
48 CJ2A 64 Ford Econoline Travelwagon If you can't get there in a Jeep, get a motorcycle! |
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 25 June 2022 at 10:52am |
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It was running with the boat stuff on it. I'm surprised it ran as well as it did with the piston like that. I caught it before too much metal went through the bearings so I was able to keep std rod and main bearings, the crank cleaned up with a light polish.
I'm going to make a adapter plate from 3/8" steel to match the ports and then make my own manifold off that. I'm thinking of making the intake from 16ga or 1/8" sheet and exhaust from a cracked jeep 4.0 exhaust manifold since all the bends are already there. I also have to do something with the front sump oil pan so it clears the front diff.
Edited by Noah - 25 June 2022 at 2:48pm |
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1952 M38-CDN
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 07 Sep. 2022 at 8:43pm |
 
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1952 M38-CDN
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Noah
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Posted: 07 Sep. 2022 at 8:48pm |
  Driver's side motor mount. I used all the available bolt holes to make it as strong as possible and 1/4" cold rolled steel. I shortened the original Mercruiser Alternator bracket and welded it on top of the mount.
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1952 M38-CDN
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 07 Sep. 2022 at 8:53pm |
 Passenger's side motor mount. I decided to go with an electric fuel pump over a mechanical one.
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1952 M38-CDN
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Noah
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Posted: 07 Sep. 2022 at 9:00pm |
   First test fit of the engine, transmission and transfer case. Everything seems to clear so far, I'm also planning to set the tub on to be sure everything fits before making a new crossmember and finish welding the motor mounts.
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1952 M38-CDN
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BD1
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Joined: 18 Dec. 2019 Location: Maine Status: Offline Points: 630 |
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Posted: 08 Sep. 2022 at 5:34am |
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Two issues I’ve had with the 153 in Shiny are that the bell housing is too close to the firewall to allow a stock gas pedal linkage, and that the radiator sits a little too high relative to the fan
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BD
'47 CJ2a, Shiny on top! '55 CJ5 project |
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Noah
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Posted: 08 Sep. 2022 at 5:30pm |
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I noticed the fan I'll probably end up trimming the bottom of the radiator shroud or go with an electric fan instead. Did you keep the stock clutch and brake pedal?
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1952 M38-CDN
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BD1
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Joined: 18 Dec. 2019 Location: Maine Status: Offline Points: 630 |
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Posted: 08 Sep. 2022 at 6:39pm |
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It had the stock clutch and brake pedal when I got it, but the prior owner didn’t move the frame mounts for the clutch and pedal shafts to match the slightly shifted location of the balls on the drivetrain so the pedals are cocked a little, and very worn. I might address that this winter. The clutch release arm was also poorly modified and wracked. I made a new one and lined up that shaft when I rebuilt the transfer case and tranny winter before last. I have the smaller 153 tooth cast iron bell housing out of an early corvette which gives me a little more room in general except that it has the cast in mounts on the sides.
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BD
'47 CJ2a, Shiny on top! '55 CJ5 project |
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Noah
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Joined: 07 Aug. 2021 Location: NS Canada Status: Offline Points: 75 |
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Posted: 27 Sep. 2022 at 8:08am |
Motor mounts done. 100% reversable in case it ever goes back to stock form, 5/16 bolts on the passengers side are temporary and will be replaces with 3/8 GR8. I'm going to add a removable gusset plate to help support the back side of the drivers side mount.   Test fit of the body with the mercruiser and sm465 in. Everything clears nicely, about 1" of body lift will allow me to reuse the original cross member with no lowering blocks for max ground clearance and skid plate that will go up to the engine oil pan. I decided to with hanging pedals since I have a set from an XJ that will fit with some modification. |
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1952 M38-CDN
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BD1 wrote: