what should compression be?

mftsc40 · 08-03-2009, 05:06 AM

I have a 89 club car w/a flathead stock(?) motor that needs a new exciter coil..I did a compression check and have 75 PSI.What should the compression be? I don't know if a rebuild is neccasary or not?

seppi · 08-03-2009, 03:08 PM

Sounds a lot like a top end overhaul at least is in need,first take spark plug out and add about 2 ounces of motor oil into cylinder....crank engine over slowly to make sure cyl..walls are coated good and do another compression test !! If your compression is significantly higher ,then it's time for a ring job at least.....If not , you have other problems....head gasket,valves ect...Good luck and let us know !!!

mftsc40 · 08-03-2009, 07:34 PM

Ty Seppi I'll try that. Does anyone know how much compression a heathy engine should have?

Murphy · 08-04-2009, 11:21 AM

Flathead Repair Book says, Normal Compression is 100 PSI. Low Compression ( under 80 PSI ) would indicate a cylinder problem like rings, gaskets, etc.

mftsc40 · 08-04-2009, 05:36 PM

thanks murphy that's what I neede to know

08-03-2009, 05:06 AM	#1
mftsc40 Not Yet Wild Join Date: Jul 2009 Posts: 14	what should compression be? I have a 89 club car w/a flathead stock(?) motor that needs a new exciter coil..I did a compression check and have 75 PSI.What should the compression be? I don't know if a rebuild is neccasary or not?
mftsc40 Not Yet Wild Join Date: Jul 2009 Posts: 14

08-03-2009, 03:08 PM	#2
seppi Not Yet Wild Join Date: Jul 2009 Posts: 3	Re: what should compression be? Sounds a lot like a top end overhaul at least is in need,first take spark plug out and add about 2 ounces of motor oil into cylinder....crank engine over slowly to make sure cyl..walls are coated good and do another compression test !! If your compression is significantly higher ,then it's time for a ring job at least.....If not , you have other problems....head gasket,valves ect...Good luck and let us know !!!
seppi Not Yet Wild Join Date: Jul 2009 Posts: 3

08-03-2009, 07:34 PM	#3
mftsc40 Not Yet Wild Join Date: Jul 2009 Posts: 14	Re: what should compression be? Ty Seppi I'll try that. Does anyone know how much compression a heathy engine should have?
mftsc40 Not Yet Wild Join Date: Jul 2009 Posts: 14

08-04-2009, 11:21 AM	#4
Murphy Not Yet Wild Join Date: Jul 2009 Location: Northwest Washington Posts: 67	Re: what should compression be? Flathead Repair Book says, Normal Compression is 100 PSI. Low Compression ( under 80 PSI ) would indicate a cylinder problem like rings, gaskets, etc.

08-04-2009, 05:36 PM	#5
mftsc40 Not Yet Wild Join Date: Jul 2009 Posts: 14	Re: what should compression be? thanks murphy that's what I neede to know
mftsc40 Not Yet Wild Join Date: Jul 2009 Posts: 14

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