Sunken 32`

Things that are of general interest.
honestcharlie56
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Re: Sunken 32`

Postby honestcharlie56 » Tue Mar 28, 2017 9:03 pm

This is the input shaft bearing.

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1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

honestcharlie56
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Re: Sunken 32`

Postby honestcharlie56 » Tue Mar 28, 2017 9:05 pm

disassembled drive on the bench.

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1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

honestcharlie56
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Re: Sunken 32`

Postby honestcharlie56 » Tue Mar 28, 2017 9:14 pm

On to the engine. Unlike the port engine, I couldn't reuse any of the pistons from the original boat engine or the core engine I bought. I guess I got real lucky with the port engine considering the donor engines pistons literally had almost ZERO wear on the. Not the case with the stbd side. Original pistons were trash and the pistons from the donor engine looked to be in good shape but didn't measure out the same. It was really odd, one piston was actually "compressed" vertically. So, new pistons we bought! Which means pressing out these old wrist pins and swapping the new pistons onto the original connecting rods. Since this engine will never see high RPM I couldn't find a reason to swap over to floating pins. So stock replacement pistons and wrist pins are what I went with. I pressed a few of them in and really didn't like how much effort it was taking to set the pins, so I swapped over to other method of heating the rod and putting the pins in the freezer. One small but fairly important note about heating the small ends of the rods!! You do NOT need to get the small ends of the rods very hot. I was able to use propane (fairly cool burning) and get the rods just past the point of burning the oil off and the steel browning, which let the pins slide right into place. Getting the steel blue is fine, I suppose, but when you see guys getting after the rods with oxy/acet torches and getting the steel red........that rod is trash.

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1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

honestcharlie56
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Re: Sunken 32`

Postby honestcharlie56 » Tue Mar 28, 2017 9:16 pm

The above picture also shows the temporary jig I threw together to set the pin location in the piston. The pin needs to be centered.
1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

honestcharlie56
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Posts: 224
Joined: Tue Jul 19, 2016 8:27 pm

Re: Sunken 32`

Postby honestcharlie56 » Tue Mar 28, 2017 9:17 pm

Wrist pin is now in place!

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1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

honestcharlie56
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Re: Sunken 32`

Postby honestcharlie56 » Tue Mar 28, 2017 9:19 pm

All the pistons are in! Remember on SB Chryslers: the oiling hole in the rod cap goes to the inside to lube the opposite bank, flat ends of the rods face each other and the beveled end faces the crank, and the notches on the pistons face to the REAR on an opposite rotation engine.

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1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

Fastjeff
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Re: Sunken 32`

Postby Fastjeff » Wed Mar 29, 2017 5:50 am

That piston that was compressed probably had water in the cylinder. Hope you didn't use the rod!

Jeff

PS: I know you know this: The reverse rotation pistons go in with 'F' facing the rear.
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

honestcharlie56
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Re: Sunken 32`

Postby honestcharlie56 » Wed Mar 29, 2017 9:42 pm

That piston very well could have made an attempt at compressing the "relatively" incompressible. That piston was from the truck block, so hopefully not. I absolutely used the rod, and really do hope its no a problem.
1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

Fastjeff
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Re: Sunken 32`

Postby Fastjeff » Thu Mar 30, 2017 5:59 am

Me too. Good luck.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

honestcharlie56
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Joined: Tue Jul 19, 2016 8:27 pm

Re: Sunken 32`

Postby honestcharlie56 » Thu Mar 30, 2017 9:23 pm

Fastjeff wrote:That piston that was compressed probably had water in the cylinder. Hope you didn't use the rod!

Jeff

PS: I know you know this: The reverse rotation pistons go in with 'F' facing the rear.


You wouldn't believe the number of people telling me I assembled this engine wrong, including a local engine builder. I'm not sure how people miss the concept....offset is on the wrong side when you reverse the rotation...not hard to comprehend.
1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's