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Old 04-23-2018, 12:08 PM   #1
Captn B
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Default 04 Club Car FE 350 intermittently looses compression after rebuild

Hello.
Last weekend we decided to rebuild our FE 350 motor key start since it was smoking and we had no power going up hill on a load.
Everything inside looked mint. Rings a little sloppy so we replaced them being cautious of gap locations.
Put it all back together comp test at 67 psi.
Fired it up let it run for about 15min.
When you lay into the gas and pull off it stalls. No compression. manually turn the motor for a bit and compression comes back. Then repeat. Gets better as it warms up but you and feel it surging while driving. Still have no power on a load but motor does not bog down.
I keep thinking it has something to do with the valves but they were fine before and the hydraulic lifters seem to be in good shape as well as the rockers. (slight wear going to order new anyway).
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Old 04-23-2018, 03:12 PM   #2
BearsFan315
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

Isn't Stock Compression around 156 PSI ??

Quote:
Originally Posted by Deans View Post
Normal compression readings for both the FE-290 and Fe-350 are quoted below... Note the 290 and 350 pedal start engines do not have an automatic compression relief valve (ACR) and should have a higher normal compression when performing the test. If it is a key start engine it could just be a bad ACR and not rings or exhaust valves. Your judgement (and wallet) will have to determine the break-even point on whether or not to re-build; i.e. it doesn't have enough power to pull cart and rider(s).

FE-290 Engine
"GENERAL INFORMATION
Prior to attempting time-consuming repairs to the cylinder assembly, a cylinder compression test should be performed using a standard compression tester. Low compression would normally indicate a problem in the cylinder assembly such as defective rings, gaskets, etc. At a cranking speed of 550-600 rpm, the compression should be typically 156 psi. This value could vary slightly depending on wear of components affecting compression."

FE-350 Engine
"GENERAL INFORMATION
Prior to attempting time-consuming repairs to the cylinder assembly, a cylinder compression test should be performed using a standard compression tester. Low compression would normally indicate a problem in the
cylinder assembly such as defective rings, gaskets, etc.
• Key-Start Engines: These FE350 model engines are equipped with an automatic compression release valve (ACR). This valve releases compression pressure at normal cranking RPM, resulting in lower compression. At a normal cranking speed of 550 - 600 RPM, the compression should be typically
71 psi. This value could vary slightly depending on wear of components affecting compression. See Automatic Compression Release Valve (ACR) Inspection on page 3-22.
• Pedal-Start Engines: These FE350 model engines are not equipped with automatic compression release valves (ACR). At a normal cranking speed of 550 - 600 RPM, the compression should be typically 156 psi. This value could vary slightly depending on wear of components affecting compression."
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Old 04-24-2018, 06:53 AM   #3
lockman1
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

It's a "key start" FE350 w/ACR BearsFan! so, 67 psi out of 71 psi isn't that far off!

Captn...

The ACR (Automatic Compression Release) is mounted on the camshaft with a spring on it, and it works on centrifugal force of the cam.
It could be that the spring is missing/stretched, OR... the ACR just isn't returning to "home" properly.

I don't know very much about ACR's except that the only replaceable part is the spring, and if it isn't the spring... the cam has to be replaced.

Club Car ACR spring part# 1017511

Club Car Camshaft, FE350/FE400 with ACR, 44-tooth (includes spring) part# 1022716-01

Oh... and welcome to BGW!
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Old 04-24-2018, 08:38 AM   #4
unknwn
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

Please excuse hijack of the thread, but it follows the conversation (sort of).

Does a retro-fitted key start for a NON-ACR FE350 suffer from cranking problems upon starting?
My pedal start cart turns over and starts reliably (as long as the battery is up to snuff), but I have been toying with the idea of changing to key-start because I like the idea of engine oil being up to operating temperature during stop & go usage.
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Old 04-25-2018, 10:57 AM   #5
Captn B
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

Hi everyone thank you for your replies.
I am leaning towards the top end since it runs and drives but drops compression completely like a valve is stuck.
I ordered new lifters and rods since once I rolled them and one looked a little bent.
I talked to a shop in riverside and they said they've had the same issue only once and now when they do a rebuild they automatically put new lifters in. Key starts use the hydraulic lifters.
They should arrive today and I'll update once they are replaced.
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Old 04-25-2018, 09:12 PM   #6
Captn B
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

Hydraulic lifters replaced. Idles way better. But......
Now it only runs at 1/4 throttle and dies if you let off the gas quickly.
Even if you rev it up at the carb it won’t go past 1/4 throttle.
Pulls hills just fine just won’t get up to speed up hill or down hill.
Really confused.
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Old 05-09-2018, 11:23 AM   #7
Captn B
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

I'm at a loss.
Cant seem to figure out why I only have 1/4 throttle and randomly drop all compression.
I took carb off another working cart and put it on. No change. I've got the motor apart (again) and the ACR moves freely without obstruction.
I even disabled the rev limiter by cant get past 1/4 throttle. The new oil that has maybe an 3 hours runtime smells like gas since the carb opens up when you step on the pedal but motor will not pick up. It pulls the hill just fine but at a snails pace.
Help
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Old 05-21-2018, 07:59 AM   #8
Captn B
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Default Re: 04 Club Car FE 350 intermittently looses compression after rebuild

I pulled the motor apart again and went through it systematically and found the problem.

If your motor randomly looses compression, has no power, won't give you more than 1/4 throttle after you rebuild it......

Make sure you put the seat valve in the oil pump in the correct way....!

We had ours in backwards and I guess it could not build up oil pressure...
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