Piston Swap Questions.


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Pile of Parts
Pile of Parts

Posts: 27

Joined: Mon Mar 05, 2018 8:23 pm

Location: Atlanta, GA

Post Sun Aug 12, 2018 1:20 pm

Piston Swap Questions.

I have a 4-152 in my 64 C900. The head cracked on it, but I managed to pick up a 304 from a '79 Scout cheaply. I pulled the head off of the 304 to put on the 152 but ran into a snag. The 304 had the flat top pistons while my truck has the contour type pistons. I know that the piston types are specific to the head and have to match.

So my question is, can I just swap the pistons from the 304 to the 152 with a fresh set of rings. If so what measurements will I need to check? And how difficult is it to remove the pistons from from the enginr? (Are they accessible without removing the connecting rods?)
1964 International C900 Pickup
1987 Subaru RX-Turbo
2017 Subaru WRX

Golden Jubilee
Golden Jubilee

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Joined: Thu Dec 27, 2012 12:45 pm

Location: Canada's left Coast

Post Sun Aug 12, 2018 6:14 pm

Re: Piston Swap Questions.

I have never heard of a Scout Cheaply until now. If the 304 is in good running condition, install the 304 and scrap the 152. If the pistons are good enough for a transfer, maybe the rest of the engine is OK.
I would rather have tools I do not need than to need tools I do not have
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Pile of Parts
Pile of Parts

Posts: 27

Joined: Mon Mar 05, 2018 8:23 pm

Location: Atlanta, GA

Post Sun Aug 12, 2018 7:36 pm

Re: Piston Swap Questions.

Fair enough Nikki! I meant to say that I got the 304 at very low cost.

I don't particularly want to scrap the 152, as unique as it is. Also I'm on a short timeframe atm. I am under contract on a house and will be moving soon. I planned on waiting until I got moved to tear the 304 down and rebuild it. Plus I would have to get mounts fabbed up for it as they are different from the 152.
1964 International C900 Pickup
1987 Subaru RX-Turbo
2017 Subaru WRX

Yard Art
Yard Art

Posts: 84

Joined: Sun Dec 16, 2012 9:12 pm

Location: Western North Carolina

Post Sun Aug 12, 2018 9:42 pm

Re: Piston Swap Questions.

To remove piston:
1. remove oil pan & valve cover(s)
2. remove cylinder head(s)
3. unbolt the rod cap bolts (2) on each connecting rod
3a. keep each con-rod cap with each corresponding connecting rod
4. push piston & connecting rod up thru block
5. remove piston pins from the pistons & connecting rods
My Junk --> 1975 IH Model 200HD, 1 ton 4x4 truck, 392, 4 speed, etc.
My cave location --> Western North Carolina
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Pile of Parts
Pile of Parts

Posts: 27

Joined: Mon Mar 05, 2018 8:23 pm

Location: Atlanta, GA

Post Mon Aug 13, 2018 7:37 am

Re: Piston Swap Questions.

1975IH200. Thank's that's exactly what I needed!
1964 International C900 Pickup
1987 Subaru RX-Turbo
2017 Subaru WRX

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