200 block problems

tleake · Jan 18, 2013

I have a 200 with a severly cracked block, beyond repair I think, photos attached. I also have a good block from a 51 Super C. Is there any problems with switching these blocks and moving all parts over from the 200 block. I know I will lose the dipstick but are there any other problems I will encounter? The 200 also has one flat top piston in it. I also have a 230 I could do an engine swap and gain a few horses. Some opinions on what to do here would be appreciated.

tntleake · Jan 18, 2013

I haven't pushed the sleeves out yet to see if sleeves seals are bad. Could I get lucky with sleeve seals, and head gasket? I have not been into a c-123 yet

LMack · Jan 18, 2013

It is my understanding that the block castings for all three engines are basically the same. HP comes from the head shape, shape of the pistons, the length of the rods, the thickness of the sleeves/piston diameter, and the compression ratio. I agree that the crack may be beyond repair. Even the 113 blocks are much the same.

Iamarv · Jan 18, 2013

If I read your question correctly, You want to put the SC block in 200 and take the 200 engine componets (sleeve. piston etc) and put it in the SC block. I have never tried that but I do know that when ordering overhaul kits for the various 123 engines the correct block number does make a difference.

The current 200 engine block is damaged beyound repair...in my oponion.

I would put the 230 engine in the 200.

El Toro · Jan 18, 2013

The sleeves in the Super C measure 7-1/32" in length and the diameter of the sleeve measure's 3-7/16" at the seal. Hal

Owen Aaland · Jan 19, 2013

Your block can most likely be repaired with repair plugs but it becomes a matter of what it would cost versus the option of replacing it.

It appears that the cracks would all be covered by the head gasket. I have has success reusing similar blocks without repairing them but I certainly would make any promises that it would hold. The problem with leaving it as it is would be that the crack where the stud is removed would allow the block to move enough that gasket would not seal on top of the sleeve.

gene bender · Jan 19, 2013

I tore and engine down that was cracked where your is and it didnot leak. The lip on the gasket where it seals the sleever did stop it from getting coolant in the combustion area. For light duty i would replace the gasket with a good sealer and use. You can add some great sealent in the colling system as the water pump will circulate and stop any leakage. Use some of the type Nascar uses it has stopped more severe cracks than you have. The head bolts will do their job. Some pullers have used that stuff with some pretty hi-powered engines and it did work. It sure is worth a try as i know some mechs that would almost gurantee yours to not leak. After all we are not building a hi-tech engine under extreme use. Go for the sealent. Im not talking theory but expereince.

400Dtractorman · Jan 19, 2013

First I wouldn't do all the work your talking about unless I used new parts especially the seals. Lot of work and money to put back together with used parts. Just my opinion. The sc and 200 block casting # starts with 35. These blocks are the same. The 230 block # starts with 36. The only difference that I know of is if you want to go to 3 1/4 pistons you can get an over bore kit for the sc and 200. The 230 has to be bored out as the bottom of the block tappers in. All three are 123 but you can't put an overbore kit in a 230 without boring the block. The 230 is a lot stronger motor. Hope this helps. Ed

400Dtractorman · Jan 19, 2013

First I wouldn't do all the work your talking about unless I used new parts especially the seals. Lot of work and money to put back together with used parts. Just my opinion. The sc and 200 block casting # starts with 35. These blocks are the same. The 230 block # starts with 36. The only difference that I know of between the sc/200 and the 230 block is if you want to go to 3 1/4 pistons you can get an over bore kit for the sc and 200. The 230 has to be bored out as the bottom of the block tappers in. All three are 123 but you can't put an overbore kit in a 230 without boring the block. The 230 is a lot stronger motor. Hope this helps. Ed

mkirsch · Jan 20, 2013

I would rather knock a Super C in the head for its engine than a 230. There are a LOT more Super Cs, and the 230's are pretty rare.

tntleake · Jan 20, 2013

Exactly what I intend on doing. I found a Super C with a good block and rear rims and hubs which my 200 needs, as well as a drawbar and narrow front with good tires. good sheetmetal. I think i will build it with the crank, rods and head from the 200 as well as govenor and such. I have a SC already and it is the high alitiude pistons in it, F/H and good rubber all the way around.

200 block problems

tleake

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tntleake

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LMack

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Iamarv

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El Toro

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Owen Aaland

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gene bender

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400Dtractorman

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400Dtractorman

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mkirsch

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tntleake

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