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Clinton Model 800 Engine Rebuild Help


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  #1  
Old 06-28-2019, 11:53:35 PM
Subzero97 Subzero97 is offline
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Smile Clinton Model 800 Engine Rebuild Help

I decided on a whim to rebuild my 1950s Clinton Model 800 I’ve had for a long time just sitting on my workbench. I first bought this engine in 2012 and posted about it here https://www.smokstak.com/forum/showthread.php?t=104379 . I tore it all down and now need to remove the valves and camshaft. This is my first engine rebuild but I have experience with working on engines, just not quite this age. I have a few questions if anyone can provide some help for a first timer.

1.How do you remove the valves from these engines? Everything is out except for the camshaft and both valves.

2. The muffler is stuck in the head, how should I go about removing this? I’ll also need to find a replacement one and I’m not sure where to source this.

3. The engine ran before but did smoke. The bore looks good and the piston looks reusable. Can I just install a new stock size ring and hone the cylinder?

4. Where can I find a rebuild kit for a Carter Model N carb?

5. Id like to repaint the engine while it’s apart the correct green color and add correct decals, are these available?

Also any tips y’all can provide on rebuilding these as it is my first time. I greatly appreciate any help you can provide!
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  #2  
Old 06-29-2019, 12:15:15 AM
EvilDr235 EvilDr235 is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

There are parts sellers on this site. I would search eBay also for parts and a owners manual and a service manual. You might also check Craigslist for parts. They do show up in my area once and while. you should also do a search on this site for other people asking questions and working on Clinton engines.
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  #3  
Old 06-29-2019, 04:36:01 AM
enginecrzy enginecrzy is offline
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Photo Re: Clinton Model 800 Engine Rebuild Help

Lots of n.o.s parts on flea-bay, you just need to know part#s.

A small engine valve spring compressor tool is what you need
to get the valves out. The c clamp style works best for me but the valve chest style spring compressor works fine too, Its just much tighter working with it. Screwdrivers & needle nose pliers can work if you are in a pinch & ginger with them.

The mufflers very on how stuck they are. Clamp the engine down to the workbench & wire brush the pipe threads best you can. Soak it with penetrating oil of your choice from inside the exhaust port & out. Use a round punch to back off the lock nut if it has one. Carefully try a pipe wrench or channel locks & you might get lucky. Use moderate pressure or try tapping with a hammer on the wrench to persuade it at first.

You could also try heating it with a torch, although this didn't work for me in one case "propane was'nt hot enough." If it is not giving or you feel that you are crushing the pipe you should probably stop & let a shop look at it. I had to take this route & it didn't cost too much. I was able to clean up the muffler pipe afterwards somewhat with a file.

I use anti seize on threaded muffler pipes & studs too, bit of insurance. More drastically, if the muffler is beyond being salvageable, you can try a pipe extractor tool or collapsing the pipe in on itself by hack-sawing the pipe stub through from the inside lengthwise & use a hammer & punch to curl the pieces inward, but this is rather scaring to the engine.

If an exhaust stud is stuck, clamp vise grips to it & bounce it back & forth like a spring board for a long while until you hear a faint "click" of the stud threads letting go. 1954 Hudson Jetliner

https://picclick.com/?q=vintage+clinton+engine
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  #4  
Old 06-29-2019, 09:14:25 AM
gdstew gdstew is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

Larry Rarus has a website just for Clinton. Should be of great value.

http://www.clintonengines.us/Home.html
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  #5  
Old 06-29-2019, 10:32:15 AM
Partsman Partsman is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

Hi I am a sponsor on this site, I can supply all the parts you need. Thanks Jim, Jim's Antique Small Engine Parts
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Old 06-29-2019, 11:22:07 AM
K-Tron K-Tron is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

Your Clinton engine was originally on a Rototiller Inc. tilling machine. Be careful buying parts for these engines, especially the Carter model N carburetor. The tapered bowl for these carburetors will not allow a common Carter float to work. These carburetors use a special tapered brass float. It looks like a donut cut down the middle. Later carter carburetors had larger venturi bores, squared off float bowls and a matching squared off float. Go to Larry Rarus site and download a parts breakdown for your engine. Clinton parts are quite cheap on ebay since there isnt as much of a calling for them. They are a great little engine. The valve keeper on the A800s is a horseshoe shaped piece. Just compress the valve spring and slide it out, nothing difficult about it. To remove the muffler, heat the block with a propane torch, try not to heat the muffler up. Spray the threads with a penetrating oil, and try twisting the muffler out wearing a leather glove. If that does not work, move up to a pipe wrench. They usually come out without much trouble. As for the bore, you need to at least put a feeler gauge between the piston and bore to see how much clearance you have. If excessive, a new set of rings will not fix the problem for long. Oversize pistons are available, as are the rings. You should also platigauge the connecting rod to the steel crankpin. You may need a new rod depending on hos much run-time there is on the engine.

Chris
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Old 06-29-2019, 03:52:13 PM
Subzero97 Subzero97 is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

I went to the store and bought a propane torch to try and remove the exhaust muffler. They did not have a valve spring compressor like I needed so ill have to order one if i cant get the springs out with the pliers trick.\. Thanks for the parts locations, looks like I can find all i'll need from those people.
The cylinder hone they had was very large, so will a brake cylinder hone work for this application? My hone is good for up to 2-3/4 inch.

Im still trying to find the correct green engine paint for this engine also.

---------- Post added at 03:41:57 PM ---------- Previous post was at 03:38:33 PM ----------

Also, how does one go about removing the camshaft after removing the valves?

---------- Post added at 03:52:13 PM ---------- Previous post was at 03:41:57 PM ----------

Im finding alot of gasket kits for the Carter Model N, is there a designation for which model as you mentioned mine is different than most Carters?
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Old 06-30-2019, 12:55:32 AM
K-Tron K-Tron is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

What are the numbers on your carburetor? Should have "705" or so cast into the top of the flange where it bolts to the engine.

Chris
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Old 07-01-2019, 02:18:25 AM
Ogrebeast64 Ogrebeast64 is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

Quote:
Also, how does one go about removing the camshaft after removing the valves?
If memory serves, you have to drive out the pin that holds the cam in the block, much like the older Briggs engines. It will only come out one way, so tap it out from the smaller diameter hole.

HERE is some information that you may find helpful.
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Old 07-15-2019, 01:22:29 PM
Hevury Hevury is offline
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Default Re: Clinton Model 800 Engine Rebuild Help

id highly disagree with painting this engine it has such a nice decal on the shroud that made it this long it be a shame to destroy it. just rebuild it and clean it up good and run it! just my opinion. I own about 30 all original Clinton and like preserving as much of the original decals and paint as possible.
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