The Ford Barn

32Bee · 08-12-2018, 11:01 AM

Have never checked compression on any engine so need some accurate info
on the correct process. Any comments will be appreciated. Engine is a stock 32
4 cylinder. Have borrowed gauges from a friend.

1931 flamingo · 08-12-2018, 12:10 PM

Remove the plugs, place gauge, spin over 2 to 3 times using starter with the carb OPEN .
Paul in CT

Charlie Stephens · 08-12-2018, 12:15 PM

What head do you have? First thing to do is check to see that the gauge will fit in the spark plug hole, if it won't you need to start by finding an adapter to a smaller plug. Be sure the battery is charged, you can't spin it fast enough with the hand crank. Next see post #2.

Charlie Stephens

32Bee · 08-12-2018, 01:34 PM

My head is the 7/8" spark plug size holes and one of the gauges I've borrowed
is large enough to accommodate that six

So, I'm to have all 4 plugs removed while this process is being done?

WHN · 08-12-2018, 01:57 PM

Paul has it right. No plugs! Good luck. Enjoy.

J Franklin · 08-12-2018, 02:35 PM

Sponsored Links (Register now to hide all advertisements)

Tell us the reading when the job is complete.

Bob Bidonde · 08-13-2018, 10:12 AM

Ball park gauge readings should be 14.7 times the 4.6 compression ratio of a stock Model B = 68psig. Dynamic effect due to piston motion will raise the gauge reading a bit more, into the low 70s.

Jim Brierley · 08-13-2018, 10:39 AM

Engine should be warmed up first, or at least started to insure rings and cylinders are oiled. Do a dry test first, and if you want, put a squirt of oil in each cyl. and re-test. This will let you know if the rings are sealing well.

harryc · 08-13-2018, 05:15 PM

open or closed throttle I have never seen a bit of difference

08-12-2018, 11:01 AM	#1
32Bee Senior Member Join Date: May 2010 Location: Stratham, NH Posts: 233	Checking 32 B Compression Have never checked compression on any engine so need some accurate info on the correct process. Any comments will be appreciated. Engine is a stock 32 4 cylinder. Have borrowed gauges from a friend.

08-12-2018, 12:15 PM	#3
Charlie Stephens Senior Member Join Date: May 2010 Location: Southern California Posts: 7,032	Re: Checking 32 B Compression What head do you have? First thing to do is check to see that the gauge will fit in the spark plug hole, if it won't you need to start by finding an adapter to a smaller plug. Be sure the battery is charged, you can't spin it fast enough with the hand crank. Next see post #2. Charlie Stephens

08-12-2018, 01:34 PM	#4
32Bee Senior Member Join Date: May 2010 Location: Stratham, NH Posts: 233	Re: Checking 32 B Compression My head is the 7/8" spark plug size holes and one of the gauges I've borrowed is large enough to accommodate that six So, I'm to have all 4 plugs removed while this process is being done?

08-12-2018, 01:57 PM	#5
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 1,823	Re: Checking 32 B Compression Paul has it right. No plugs! Good luck. Enjoy.

08-12-2018, 02:35 PM	#6
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 5,963	Re: Checking 32 B Compression Sponsored Links (Register now to hide all advertisements) Tell us the reading when the job is complete.

08-12-2018, 12:10 PM	#2
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: Checking 32 B Compression Remove the plugs, place gauge, spin over 2 to 3 times using starter with the carb OPEN . Paul in CT

08-13-2018, 10:12 AM	#7
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,470	Re: Checking 32 B Compression Ball park gauge readings should be 14.7 times the 4.6 compression ratio of a stock Model B = 68psig. Dynamic effect due to piston motion will raise the gauge reading a bit more, into the low 70s. __________________ Bob Bidonde

08-13-2018, 10:39 AM	#8
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,088	Re: Checking 32 B Compression Engine should be warmed up first, or at least started to insure rings and cylinders are oiled. Do a dry test first, and if you want, put a squirt of oil in each cyl. and re-test. This will let you know if the rings are sealing well.

08-13-2018, 05:15 PM	#9
harryc Senior Member Join Date: Sep 2012 Location: CA Posts: 206	Re: Checking 32 B Compression open or closed throttle I have never seen a bit of difference