Purchased a Changfa R165 watercooled diesel engine, question about flywheel play

[Jesse McB]

Thank you for your advice veggie! I will have to think about what to consider! 

Ok so the piston is not that bad in shape  I can admit that if i hone this cylinder the scratch will not disappear its deep enouph to catch my fingure nail. Im considering if i should purchase a new cylinder piston kit which cost about $80 with delivery, or just use these parts. The way i feel is its a shame as the cylinder only have about 5 minutes of run time! And the engine did run good when test running I seen no oil buring, so im sceptle on thinking what would be the worse that can happen if I use this scratched cylinder?

[Jesse McB]

Well i made up my mind!  

I just purchased a brand new cylinder liner and piston kit! I got express shipping so it will be here in under 14 days   I also ordered some extra parts, 4 sets of connecting rod bearings, 4 head gaskets, 4 sets of valve guides, and 4 governer springs. I like to have extra parts so that way incase of a repair.  

Now all whats left on my list for this engine is to buy a socket tool kit and a 10-150 ftp torque wrench, and finish it all off with some por-15 red enamel paint! The only tools i used to disamble this engine was its included flywheel wrench, adjustable wrench, screw driver, small tapping hammer, my home made cylinder puller", 8" bearing puller, and a piece of hardwood.

Then the other half of the project starts!! Mounting the engine on a small mobile cart, generating power with an alternator, cooling with a small atv radiator is my idea.    

[mike90045]

I'd suggest do the hone job as previously described, won't hurt, and would be good practice for future.
And the scotchbrite on the piston.

And run it.   You have a spare on the way, and all you loose is the head gasket, or run it till it croaks, and then redo.
If you are going to toss the cyl and piston, may as well get some usage before you scrap them,  what's the worst,
can a ring catch on the scratch and jam the piston?
 Would it break anything else ?  
It'd give ya a chance to "shake" loose any remaining sand as well.
 Everyone else chime in

[Jesse McB]

Thank you mike for your advice, now i got some thinking to do lol.
It does make sense to perhaps just use the cylinder and piston, i cant see any reason it could cause any damage to the engine, and also from what i read carbon fills in the voids. I do like the thought of having a shiny new overhaul kit

I cleaned the cylinder amd piston with oven cleaner and it removed the carbon just perfect!!!!  And it looks very clean! Im going to go with your idea mike  and just use it! After all its not going to hurt anything but itself lol. So now im gonna use my homemade cylinder installer! ill post a pic of it!

[Jesse McB]

Heres a few pics of the home made cylinder pulling tool i made, i made it so it breaks down in 2 pieces so it can do both remove and install the cylinder.
I installed the orginal cylinder regardless of the scratch, i notice it only goes through a small portion of the combustion zone. The cylinder Is nice and clean with a perfect crosshatch, ive seen engines way worse and they ran just fine. So i guess a have a new shiny spare parts for the future lol!

[Jesse McB]

R165 diesel engine Cylinder tool

This is it setup to install the cylinder

[Jesse McB]

R165 diesel engine cylinder tool

This is it setup to remove the cylinder

[veggie]

Nice tool improvisation  
I think your choice to run the existing piston/cylinder is a good one.
It gives you a chance to experiment with different alternative fuels for a while without worrying about the bore and rings.
As I recall you were planning to burn WVO or WMO ?
Once all the experimenting is done you can install the new piston/sleeve if needed.

Veggie

[Jesse McB]

Veggie you are absolutely right! Great idea! Its best to do all the experiments with the original parts, and if it runs good ill just keep using the parts till the end. this means ill have fresh new parts put away for the future! I do like my sleeve puller tool it only took one quick glance at a few bicycle tires and i got the idea rite away! Long fine threaded hardened steel studs  

Yes im going to burn WVO, i will be collecting mine throughout the next 5 months from our household, we change it alot so its fresh, so all ill need is 14 gallons. I will have enouph collected by june . Im going to mix it with 50/50 diesel, thats my idea for burning wastes fuels. now i cant wait for my parts packages to come in the mail. I beleive ill have the engine running  for a bench test by next 2 weeks!! I live in the city so ill take it to my girl friends parents place in the country to do some testing  

[Jesse McB]

Im still waiting for my parts package to arrive! Updates will be coming soon! 

[Jesse McB]

The new parts package finally got shipped from china, it took almost 3 weeks for the sales company to get all the parts ordered from the manufactures., the chiniese new years slowed the order big time! Its shipped with dhl express fast shipping so it will be here quick well i hope lol, my projects been sitting untouch for a few weeks  Well for my birthday i purchased a nice socket set, now i need a nice torque wrench!

[Jesse McB]

Great news!! My package of parts arrived and they are perfect shape!!!   The 4 head gaskets look very decent! The cylinder sleeve is shiny no rust and no scratches! The cylinder had some dust on it but i washed it and its just perfect clean! The piston is in great shape! The connection rod bearings arrived in good shape and they are good quality! The valve guides are perfect qualtiy they have a bore hole to allow oil to drip for better lubrication. The piston rings arrived in perfect shape, and the throttle springs, well i ordered 4 and they sent me 8!    reason i think is because i have 2 types, ones longer and the others shorter, i used the longer one its rust free and the type used for this engine, the shorter springs will work i imagine if i wanted to use them, lol who needs a throttle spring? Ill sell for a good deal lol! I have the entire engine assembled! And now i just need to paint it! The. The other half of the project involes the cooling system, oil system, fuel system, alternator and engine mount. Heres some pictures of the parts and assembly!  look at the valve guides how the ones i ordered in have the bore holes for oil.

[Jesse McB]

Parts for changfa R165

[Jesse McB]

Changfa R165

[Jesse McB]

Changfa R165

Look at the phote of the valve guides! They are better design for oiling, the other ones were shorter and no oil bore.