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Fixing/cleaning tr10d engine


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#31 Alc ONLINE  

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Posted December 30, 2014 - 06:44 AM

I've been reading this thread and still confused a little lol . So the 1/2 stamped on the piston isn't  haft  a thousands .0005"  it's .005"  ?   Which seems more like it , lets face it my own hair measures .003"  , I couldn't  imagine the factory worrying about making a piston only .0005" bigger I wouldn't be surprised if  new pistons have that much difference between them



#32 DougT ONLINE  

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Posted December 30, 2014 - 08:32 AM

Al, I've wondered how tight of tolerance they held on their pistons too. With a .001 variance in the bore spec I could see maybe having a .0005 over piston to tighten the clearance. I think Wisconsin would have been more likely to worry about that than a lot of small engine builders. The thing that gets me is that the bore dimension isn't showing .005 over.

 

I worked at Ford when they had the recall for piston slap in the 2.3 engines. Ford supplied a bunch of pistons in .001-.002 increments and a rigid hone. We used the rigid hone to true the bore round and fit a piston by hand. After you did a few you could get the "feel" for it and you didn't have to waste a lot of time measuring.


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#33 dlang94 OFFLINE  

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Posted December 30, 2014 - 10:12 AM

When I was opening the engine this fell out ImageUploadedByTapatalk1419952317.267530.jpg
I forgot to ask about it. Where does it go I am pretty positive it came from the engine I've never seen it before.

Edited by dlang94, December 30, 2014 - 10:12 AM.


#34 Bolens 1000 ONLINE  

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Posted December 30, 2014 - 10:12 AM

Thats your governor ball that sits up against the spring in the cam gear



#35 dlang94 OFFLINE  

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Posted December 30, 2014 - 10:17 AM

Alright thats why it fell out then.

I'll get back to you in a little while about the crank I almost have all the aluminum taken off.

Edited by dlang94, December 30, 2014 - 10:18 AM.

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#36 dlang94 OFFLINE  

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Posted December 30, 2014 - 02:55 PM

ImageUploadedByTapatalk1419969117.955254.jpg ImageUploadedByTapatalk1419969130.489470.jpg

Its measuring 1.37 all the way around. It read 1.37-1.372, the .002 could be my error from not having it dead on.
I didn't end up using muriatic acid, I found on google that lye can be used also and used easy off heavy duty since I needed that for other things too. I put the crank in my oven at 250 took it out sprayed the over cleaner let it sit then used my hand wire brush and electric wire brush.

Edited by dlang94, December 30, 2014 - 02:58 PM.

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#37 Bolens 1000 ONLINE  

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Posted December 30, 2014 - 05:40 PM

That cleaned up nice



#38 JBRamsey OFFLINE  

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Posted December 30, 2014 - 05:44 PM

You used a wire brush on your crank journals? Can you feel grooves with your finger nail? Hopefully the journal isn't scarred. And I would be very skittish about using my home oven to remove aluminum. I wasn't a chemistry major but I can only imagine the mean and nasty things that are out gassing as the lye reacts with the aluminum during this process. Good luck.
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#39 dlang94 OFFLINE  

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Posted December 30, 2014 - 07:58 PM

No groves. I used my oven to heat the crank then took it out of the oven brought it outside sprayed it and let it sit, outside.

#40 JBRamsey OFFLINE  

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Posted December 30, 2014 - 08:43 PM

It looks like it cleaned up well. I have a Briggs Model N crank that I need to clean and I've been told to watch muriatic acid because it can screw up your crank. I use cheap oven cleaner to prep parts for paint--outside with no heat--with success.

#41 dlang94 OFFLINE  

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Posted December 31, 2014 - 01:07 PM

I just used the heat because the oven cleaner says it works faster on ovens when they're at 200.  I used some find sand paper to clean and last bits of aluminum and it is looking great, clean and smooth. Let us know how it goes when you clean yours up.

 

The head gasket looks in good condition and I plan to reuse that.  But for the other gasket would it work fine if I cut out my own from engine gasket material?



#42 Titus OFFLINE  

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Posted December 31, 2014 - 01:34 PM

Gaskets are pretty cheap online, I'd suggest you replace it.



#43 Bolens 1000 ONLINE  

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Posted December 31, 2014 - 01:37 PM

Gaskets are pretty cheap online, I'd suggest you replace it.

 

:ditto: especially the head gasket

You can get them individually or in a complete gasket set.


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#44 DougT ONLINE  

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Posted December 31, 2014 - 03:02 PM

Don't forget that the thickness of the side gasket can affect crankshaft endplay.


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#45 dlang94 OFFLINE  

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Posted December 31, 2014 - 03:07 PM

Thats true I think I will go with a new head gasket since I'm doing the other stuff.

ImageUploadedByTapatalk1420056277.902686.jpg . I made a new gasket for the breather plate (I believe its called) and one for the bolt.
ImageUploadedByTapatalk1420056364.127500.jpg ImageUploadedByTapatalk1420056374.843983.jpg . I need to make or order that one.

ImageUploadedByTapatalk1420056402.381070.jpg . Make or order that one too.




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