The Ford Barn

goodcar · 08-09-2021, 09:23 PM

1 and 2 are 90 psi. 3 and 4 are 80. 5.5 head, counterweighted crank and lightened flywheel. Should I be concerned??

Gary WA · 08-09-2021, 09:47 PM

No!

Mulletwagon · 08-09-2021, 09:59 PM

Enjoy your ride !!

CWPASADENA · 08-09-2021, 11:38 PM

I agree,

I would not get more involved at this time, drive it!

Chris W.

Big hammer · 08-10-2021, 08:04 AM

4oz MMO in the gas tank, go for a drive, Enjoy!

nkaminar · 08-10-2021, 08:09 AM

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It could be something as simple as variation in valve lash or variation in the camshaft lobes. Or a small leak in one of the valves. I would not worry about it until it gets down to about 60 psi in the lower cylinders. If you want you could check the valve lash as that is a regular maintenance procedure. Also, re-torque the head nuts to 55 foot-pounds, another regular maintenance procedure.

Merc Cruzer · 08-10-2021, 08:33 AM

Quote:

Originally Posted by goodcar

1 and 2 are 90 psi. 3 and 4 are 80. 5.5 head, counterweighted crank and lightened flywheel. Should I be concerned??

Did you check them when the engine was cold or hot?

goodcar · 08-10-2021, 03:36 PM

Quote:

Originally Posted by Merc Cruzer

Did you check them when the engine was cold or hot?

Hot, throttle wide open.

Werner · 08-10-2021, 04:23 PM

Quote:

Originally Posted by Big hammer

4oz MMO in the gas tank, go for a drive, Enjoy!

That's also my opinion. Do you drive short distances? Drive a long distance (>40 mls) with alternating power in the upper range.

08-09-2021, 09:23 PM	#1
goodcar Senior Member Join Date: Apr 2013 Posts: 293	Uneven compression 1 and 2 are 90 psi. 3 and 4 are 80. 5.5 head, counterweighted crank and lightened flywheel. Should I be concerned??

08-09-2021, 09:47 PM	#2
Gary WA Senior Member Join Date: May 2010 Location: Clinton,WA/Whidbey Island Posts: 4,104	Re: Uneven compression No! __________________ www.whidbeymodelaclub.com

08-09-2021, 09:59 PM	#3
Mulletwagon Senior Member Join Date: Jan 2019 Location: Florida Panhandle Posts: 585	Re: Uneven compression Enjoy your ride !!

08-09-2021, 11:38 PM	#4
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,884	Re: Uneven compression I agree, I would not get more involved at this time, drive it! Chris W.

08-10-2021, 08:04 AM	#5
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,131	Re: Uneven compression 4oz MMO in the gas tank, go for a drive, Enjoy! __________________ Don't force it with a little hammer tap, tap, tap get a bigger hammer tap done

08-10-2021, 08:09 AM	#6
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,897	Re: Uneven compression Sponsored Links (Register now to hide all advertisements) It could be something as simple as variation in valve lash or variation in the camshaft lobes. Or a small leak in one of the valves. I would not worry about it until it gets down to about 60 psi in the lower cylinders. If you want you could check the valve lash as that is a regular maintenance procedure. Also, re-torque the head nuts to 55 foot-pounds, another regular maintenance procedure. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.