Help! gx160 oil level problem

[d-killakart]

Hi guys,

So here's the first stupid problem I ran into when I first got my kart. I pulled a major noob movement but anyways here's what happened. I cleaned the carb and threw in some gas and oil. (same amount the FSM recommends) [10w30 @ 0.6L=600mL]

The engine started right on the first try and ran great for about 3-4 minutes. then i started to notice blue smoke and then engine shut off on its own. I knew this was bad.. I went to start it again and heard a little bit of knocking so right away I assumed it was a rod knock but didn't know what had caused this since I did put in the right amount of oil as recommended by the FSM. So i started taking things apart so I could get the piston out and see what needs changing. As i pulled the front cover off, I noticed the engine was on a huge Slant which for sure starved the connecting rod causing it to seize and overheat. See below:

http://i38.tinypic.com/nd7dkm.jpg
http://i37.tinypic.com/2ytz6g5.jpg


Here is how the (honda clone) piston and connecting rod look like:
http://i34.tinypic.com/wl4z9l.jpg
http://i33.tinypic.com/1zqewph.jpg
http://i33.tinypic.com/xyvsn.jpg
scratches on piston:
http://i38.tinypic.com/34hswop.jpg
http://i34.tinypic.com/14se3vs.jpg

I have a new connecting rod on its way, I see some scratches on the piston head as well, should I change her as well or should I leave it? Would a new crankshaft be needed as well as I hope the run out isn't too OFF now after the overheating.

To conclude,
Since my motor is on the stupidest slope, I was wondering if I could put in a little more engine oil than recommended just so the connecting rod gets oiled this time. Or should I remove these stupid engine mounts or put in some spacers?

all help will be greatly appreciated!


cheers and thanks for reading!

 

[OzFab]

The biggest problem here is you don't know what everything looked like before you got it.

Blue smoke usually indicates too much oil &, as the engine is angled so the oil collects near the big end, that's very possible. The confusing part is the markings on the big end but, again, when exactly did that occur?

Usually, these engines are set on an angle to solve clearance issues. You'll probably find that, if you set the engine flat, something (most likely the carb) will hit the back wheel...

 

[d-killakart]

thanks for the info

any other suggestions

 

[landuse]

Engines can be run at a slant, and your FSM should tell you what that is. As far as I remember, they can run at about a 20 degree angle just fine.

I agree with Fabroman that you cannot tell whether the scratches etc that you are seeing is from what you have done, or the angle that it is sitting at. Is it possible for you to measure the angle it is at?

I have taken a screen shot of my Yamaha MZ175 manual to show you the angle that it can run at. Your engine is pretty similar, so it should be able to run fine at similar angles.

 

[d-killakart]

landuse thanks for the info!
do you guys think its safe to add 50mL extra oil just to be on the safe side?
my connecting rod+piston comes in tomorrow

cheers!

 

[landuse]

I am not too sure about that. Wait for one of the other guys to chip in.

 

[OzFab]

do you guys think its safe to add 50mL extra oil just to be on the safe side?

I was heading towards using less oil...

 

[Doc Sprocket]

Since the angled engine mount is a race thing, and I'm not a race guy- I really do think this oil volume question is best answered by folks that do it. So, I would advise you to check out a race kart forum like this one, and then be sure to head on back here...

 

[zbuck]

We run our B&S racing flatties at 15 degree angle with 14 oz's of racing oil.
The guys/gals that run Honda/Clones use 5-15 degrees with the same amount of oil and have no problem. I think that damage was caused by the PO. I would mic that crank real good. Its hard to tell the angle, but the oil should have been in the front of the sump and the slinger throwing plenty of oil. Unless someone put that engine together with the slinger facing the wrong way.

 

[d-killakart]

hanks toystory i will be posting on that forum just now

zbuck, the slinger was installed properly when i removed it, it was pointing down.

 

[zbuck]

hanks toystory i will be posting on that forum just now

zbuck, the slinger was installed properly when i removed it, it was pointing down.

I should have asked if the rod cap was installed correctly, with the slinger angle correct. The rod and the cap should have matching alignment marks.