How does it look?

[NJOHC]

Hey guys,
Im just starting to take apart my old 5hp Tec. I am going to clean it up and put some new piston rings on it and clean up all the crap around the valves, on the piston etc. Im also ordering an off road cam from batman. This is my first time doing this so my question is what should I use to clean this up? I posted pics below. And also, since im sill very new how does the bore look? I know its aluminum so I was expecting it to look like crap but it doesnt look bad at all to me. Thanks for any help! Im open to anything at this point lol

 

[freakboy]

to get rid of the carbon build up try mineral spirits on a rag that should work.

 

[jr dragster T]

That bore looks incredible! That piston doesnt look bad either (Pretty clean for old). Give those valves a light lapping though. Just make sure you continue to run a good air cleaner.

 

[NJOHC]

Thanks. I was surprised by the bore too. I put a tach on it before I took it apart and it revved to 5400rpm. I backed off after that because I didnt want to break anything! It was getting really tired by the end of its use when it was on the kart so I replaced it with my Subaru. But now Im on summer vacation so I thought it would be a fun, decently cheap project to hop it up and find a decent frame.I am sticking with stock exhaust and air filter etc. I just want something to work on! lol My other kart is going too smoothly for once!

 

[jr dragster T]

After close inspection whats that steel ring at the deck for? Kinda looks like a sleeve.

 

[NJOHC]

Maybe somebody else could answer that? Because I have no idea! lol Anybody?

 

[freakboy]

I think thats just the taper going to a different angle tyler. i think i know what your talking about.

Or do you mean on the head next to the head gasket?????

 

[Kenny_McCormic]

What Tyler is getting at is that's a cast iron lined bore. Good thing.

 

[NJOHC]

Yeah that's good news! Does anybody have any idea what kind of hp/tq I might be seeing with a 225 cam? Hate to be bashing Batman here but he was sort of a jerk about it and basicaly said he cant give me numbers because he is not the one doing the work.

 

[jr dragster T]

I thought you said it was a aluminum bore engine? .225" lift cam? Thats the size of a stock GX200 or roughly a briggs 5 HP cam. Thats not much cam at all.

 

[NJOHC]

Yeah its only 225...
http://hillsboro.net/users/dare/dare04/index.html

He calls it an off road cam, which is what the engine will be used for. Im more worried about tq more than I am hp.... for all I care it can stay a 5hp tec..... I just want more tq. So am I only looking at like 6-7 hp with that and some more torque? And I thought it was aluminum bore. Kenny is saying its got the cast iron cylinder sleeve. I honestly have no idea. This is my first time taking any engine apart and seeing the internals. It's all new to me. From what I can tell I dont see anything that looks like a cast iron sleeve in person or in the pics. Ill take it from you guys though. I did all this to learn and Ive learned a good amount so far.

 

[Kenny_McCormic]

The material looks like cast iron sleeves I have dealt with, stick a magnet in there to be sure.

 

[jr dragster T]

Here is a pretty clear picture of a good thick steel bore. The second picture is also steel bore just much less noticable but a good eye can still spot it. That sleeve was pressed in then the deck surface was machined. BTW that piston is in backwards, Dont follow that picture in your GX200 guys.

 

[NJOHC]

I was just going to do that..... It stuck so that's a good sign. Now I wont be so worried about revving it a little more. Batman said the cam's good up to 5800rpm but I dont think I'll take it that high. He still wont give me a power estimate though ......

 

[jr dragster T]

If he wont give you a estimate TBH he cant stand behind his products.

 

[NJOHC]

Yup.... thats what I've been thinking. This is exactly what I asked and he said.
Me:
"Ok thank you. I will order them as soon as I am able to get my mom's credit card. With this cam, what kind of RPM should it be running at? I didnt want to go over 5000 because of the aluminum bore. Also, I know you dont know the condition and how it will be assembled etc., but if you were to do it on a new engine, could you give me a hp/tq estimate? Thanks"

Batman:
"That cam is good up to 5800rpm. The aluminum bore blocks will handle that & more. Again, I would hate to guess about your motor. It depends mainly on how it is assembled.

David / Batman"

 

[greasemonkey85]

i d give it a quick hone before you put new rings in it, or it would just ruin the new rings. the cross hatch from the hone helps to hold oil molecules to the cylinder wall to help lubricate. also if it is a standard bore get some rings that are .010" over so you can file the gap good and close. if you get a good gasket set you might be able to get new rings with it, it might be considered a overhaul kit.

 

[jr dragster T]

Hmm.....Aluminum bore blocks never hold compression that long. You have a steel liner. Very durable.

 

[NJOHC]

Thanks for the piston advice etc.
And yeah Tyler, Im about done with Dave lol! I just want my parts and as long as I get them and all I dont want anything else to do with him. If I could find somebody else that makes them and could give me the same price or better Id buy from them, but nobody I can find makes them.

 

[jr dragster T]

If you dont mind me asking how much did the cam set you back?