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Ford 9N, 2N & 8N Discussion Forum
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Leakdown test--2N

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Tom in MS

03-27-2005 08:27:33




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O.K. I give up. Next stop will be to the shop where they know what they are doing. Solid copper wire will not go straight down into the cylinder to check position of the piston. Engine will not turn over by hand with the fan with all plugs removed(belt is tight enough)..Checked again 120# compression on all cylinders..must be a T model engine in this thing or something.Cranks before 1/2 revolution with no choke.

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Rob

03-27-2005 09:43:30




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 Did you know in reply to Tom in MS, 03-27-2005 08:27:33  
that you can remove the valve chamber covers and watch the valve stems and lifters? It"s those rectangles under the manifold. You can see when the valves are closed or open and when they are opening or closing. I always figure I can look at the lifters and maybe the distributor to determine where TDC must be.
New Holland sells cover gaskets for pennies. I think two cover gaskets cost me a total of 90-cents. You torque the covers to 10ft-lbs.
Also, you can idle that engine and put the tip of long screwdriver of the end of a stick or pipe on a spot on the engine to listen to each cylinder or valve to get you going. You put the other end of the stick to your ear and listen. It should sound like a sewing machine in there. You should hear and be able to get real close to any noisy problem so you know where to dig in.
You can put a wrench on the pulley nut to turn the engine but a fan blade usually works well enough. With a fan blade, sometimes you have to put pressure on the belt there between the pulleys so the belt won"t slip.

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Tom in MS

03-27-2005 09:57:57




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 Re: Did you know in reply to Rob, 03-27-2005 09:43:30  
Thanks, been doing everything I can to keep from messing with the manifold but if I fool with the valve covers the manifold will come off.Too tigh a spot to clean the surfaces and such correctly looks like to me. So while it's off I can see all I need to for TDC..At this point I do plan to check with my mechanic buddy and if he'll do it for a few hundred, he's got the job..I'm ready for it to run right and I don't have a shop where I can tear it down and work on it. I'd have to do it outside..

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HOOKER

03-27-2005 12:58:22




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 Re: Did you know in reply to Tom in MS, 03-27-2005 09:57:57  
for $$$ like that,, i'll tell momma she's goin on a roadtrip, with toolboxes, can ya wait till next weekend???
jake



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Tom in MS

03-27-2005 15:56:40




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 Re: Did you know in reply to HOOKER, 03-27-2005 12:58:22  
I'll be going by the shop in the morning to see what the mechanic says. He should fet to it in a day or two.



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Rob

03-27-2005 11:12:18




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 Re: Did you know in reply to Tom in MS, 03-27-2005 09:57:57  
Tom, you can leave the manifold in place, that"s not any problem. You"ll want to drop the governor to get to the gasket surface because those arms are too close. I believe you"ll want to remove the carb just for room to move, if I remember right. The manifold can stay, I know that.
Work outside huh? Sounds like me. I like the light.
Good luck with it.



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Tom in MS

03-27-2005 16:21:03




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 Re: Did you know in reply to Rob, 03-27-2005 11:12:18  
Thanks, I will approach the valve cover gasket replacement w/o removing the manifold. Outside work is great if it will ever quit storming and raining(in MS)



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HOOKER

03-27-2005 09:01:43




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 Re: Leakdown test--2N in reply to Tom in MS, 03-27-2005 08:27:33  
hood off????
plug wires off????
plugs out????
dist. cap off???
now look straight down the plug hole and you'll be able to see the top of the piston as it gets to the top!!!
now watch the front piston come to the top..
when it gets to the top--look at the rotor bug and see if its pointed in relation to the #1 terminal on the cap (as if the cap was on)
now do yer leakdown test on the #1 cyl.
write down yer results
now do #2 in the exact same way you just did #1
write down yer results
now do the #4 ..... .....
now #3..... ..
thats a leakdown test done in the proper firing order!!!!!
now to write down yer results where a exp. mech. can make it out here's what it should look like
example; 100-88/130
this means to us that ya started with 100psi
and it dropped to 88psi and it took 130 seconds fer it to drop.
on a worn out motor it could look like this
100-60/05
whatever shop yer a gonna take it too will do this and charge ya about $75.,
i'll do it if yer near BROKEN ARROW,OK
jake

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Hobo,NC

03-27-2005 16:58:09




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 Re: Leakdown test--2N in reply to HOOKER, 03-27-2005 09:01:43  
Never seen that before, 100-80/130 ya lost this mechanic



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HOOKER

03-27-2005 18:03:53




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 weird teachings at a tech-school in reply to Hobo,NC, 03-27-2005 16:58:09  
a buddy of mine decided he had to go to auto tech-school to become a mech.,and that was one of the wierd things that they are teaching in them schools, and now that a lot of young mechanics are showing up in tractor dealerships thats what a lot of them had been taught,, it showed me that it was not too old to learn something new
jake



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Tom in MS

03-27-2005 09:50:06




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 Re: Leakdown test--2N in reply to HOOKER, 03-27-2005 09:01:43  
Wish I was close..You'd have the job..You work too cheap..



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HOOKER

03-27-2005 11:01:05




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 Re: Leakdown test--2N in reply to Tom in MS, 03-27-2005 09:50:06  
i just got the wife a new SCION "XB"
and its dying for a weekend roadtrip
how far are ya away??
it wouldn't take long to "GET-R-DONE"!!!
jake



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Tom in MS

03-27-2005 11:13:41




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 Re: Leakdown test--2N in reply to HOOKER, 03-27-2005 11:01:05  
I'm only south a little in Wesson, MS



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Roughstock

03-27-2005 09:06:04




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 Re: Leakdown test--2N in reply to HOOKER, 03-27-2005 09:01:43  
I was wondering where you were. I figured you could help him.



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