G1 new rings = low compression

bigredhemi · 08-04-2011, 08:46 PM

I did a compression test and only had 30psi. Replaced cylinder, piston and rings, and still only have about 30 psi. I thought my seals may be bad but when I plug the sparkplug hole you can't hear any air coming from around the seals. Anyone have any ideas....I am dumbfounded!

1989Marathon · 08-04-2011, 09:00 PM

Did you replace the head gasket when you replaced the cylinder? With a new jug and piston, it's pretty hard to have low compression even with bad crank seals. Did you check the head for cracks?

bigredhemi · 08-04-2011, 09:06 PM

Brand new gaskets. I can't figure it out either. I even thought I may have put the piston in backwards and double checked to make sure.

caddylac camper · 08-04-2011, 09:12 PM

Did you check compression with the throttle wide open? Also a bent connecting rod will give you low compression. Hope this is not your case. Ring gaps staggered?

1989Marathon · 08-04-2011, 09:14 PM

Are your reeds closing? Can you feel backpressure in the carb inlet when you crank the motor?

bigredhemi · 08-04-2011, 09:19 PM

I'll have to check that in the morning its dark now.

The cart ran great then started smoking really bad. Then would not start. I took the jug off and found both rings mostly missing. I figured that replacing the whole top end would be simple and fast but now it has me stumped.

bigredhemi · 08-04-2011, 09:21 PM

Compression tested with throttle wide open, rod straight, rings aligned with pins.

1989Marathon · 08-04-2011, 09:28 PM

Quote:

Originally Posted by bigredhemi

I'll have to check that in the morning its dark now.

The cart ran great then started smoking really bad. Then would not start. I took the jug off and found both rings mostly missing. I figured that replacing the whole top end would be simple and fast but now it has me stumped.

If that's the case, I'd bet you have a hunk-o-ring keeping the reeds from closing properly.

bigredhemi · 08-04-2011, 09:31 PM

Quote:

Originally Posted by 1989Marathon

If that's the case, I'd bet you have a hunk-o-ring keeping the reeds from closing properly.

Though of that also and they are perfect. I guess the ring went into the muffler.

tjstahly · 08-04-2011, 11:17 PM

Hey just a guess but did you check your exhaust??
It may be plugged . Perhaps you should try the sticky on G1 muffler bbq.
if its plugged it wont breathe and could lower your compression.
Good luck . Tom

08-04-2011, 08:46 PM	#1
bigredhemi Not Yet Wild Join Date: Aug 2011 Location: Kansas Posts: 8	G1 new rings = low compression I did a compression test and only had 30psi. Replaced cylinder, piston and rings, and still only have about 30 psi. I thought my seals may be bad but when I plug the sparkplug hole you can't hear any air coming from around the seals. Anyone have any ideas....I am dumbfounded!

08-04-2011, 09:00 PM	#2
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: G1 new rings = low compression Did you replace the head gasket when you replaced the cylinder? With a new jug and piston, it's pretty hard to have low compression even with bad crank seals. Did you check the head for cracks?
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

08-04-2011, 09:06 PM	#3
bigredhemi Not Yet Wild Join Date: Aug 2011 Location: Kansas Posts: 8	Re: G1 new rings = low compression Brand new gaskets. I can't figure it out either. I even thought I may have put the piston in backwards and double checked to make sure.

08-04-2011, 09:12 PM	#4
caddylac camper Gone Wild Join Date: Feb 2011 Location: Winnipeg, Manitoba Posts: 177	Re: G1 new rings = low compression Did you check compression with the throttle wide open? Also a bent connecting rod will give you low compression. Hope this is not your case. Ring gaps staggered?

08-04-2011, 09:14 PM	#5
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: G1 new rings = low compression Are your reeds closing? Can you feel backpressure in the carb inlet when you crank the motor?
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

08-04-2011, 09:19 PM	#6
bigredhemi Not Yet Wild Join Date: Aug 2011 Location: Kansas Posts: 8	Re: G1 new rings = low compression I'll have to check that in the morning its dark now. The cart ran great then started smoking really bad. Then would not start. I took the jug off and found both rings mostly missing. I figured that replacing the whole top end would be simple and fast but now it has me stumped.

08-04-2011, 09:21 PM	#7
bigredhemi Not Yet Wild Join Date: Aug 2011 Location: Kansas Posts: 8	Re: G1 new rings = low compression Compression tested with throttle wide open, rod straight, rings aligned with pins.

08-04-2011, 11:17 PM	#10
tjstahly Not Yet Wild Join Date: Oct 2009 Location: Pleasant Hill Ca Posts: 45	Re: G1 new rings = low compression Hey just a guess but did you check your exhaust?? It may be plugged . Perhaps you should try the sticky on G1 muffler bbq. if its plugged it wont breathe and could lower your compression. Good luck . Tom

Similar Threads
Thread	Forum
2001 TXT, no compression? rings?	Gas EZGO
Do I need new rings?	Gas Columbia ParCar
rings	Gas Yamaha
Rings	Gas EZGO
rings	Gas EZGO