SOLVED! What now? No compression in #3

[wallaka]

Grr...right when I think everything will be OK another problem comes up.

I had tried to skimp when I put the motor together and re-torqued an unused head gasket. Of course, it didn't seal right. There was no compression in holes 3 and 4.

So I got a new head gasket and installed it today. Fired it up and--skipping like crazy. Checked the ignition, fire on all wires. Timing is right, about 12* BTDC. Pulled #3 plug wire, and yep, no change in the sound. Pulled the spark plug and swapped with #2, no change. Got the compression tester out, and hooray, no compression at all. Checked #4 and had 130 psi or so dry.

So, I don't think it's the head gasket. It has new rings, so maybe I adjusted a valve too far down?

 

[addo]

Zero compression would possibly be a stuck or damaged valve.

 

[jswhite]

bring #3 to TDC on compression and apply compressed air via the plug hole. This can be tricky and you may need a helper. If you're not right on TDC the air may push the piston down. While applying air, listen to determine where it is escaping. Out the carb - intake valve. Out the exhaust, exhaust valve. Oil filler cap, rings. Bubbling in the rad, into a water jacket. You get the idea.

You can use a leak down tester as well if you have access to one. Usually takes less hands. heh heh.

-- jay

 

[fordconvert]

I had tried to skimp when I put the motor together and re-torqued an unused head gasket. Of course, it didn't seal right.

You mean it was one that had been installed before but the motor had not been run?

 

[wallaka]

I had tried to skimp when I put the motor together and re-torqued an unused head gasket. Of course, it didn't seal right.

You mean it was one that had been installed before but the motor had not been run?

Yeah. I torqued it down but took the motor apart again before it ran.

 

[Bort62]

I've re-used Headgaskets in that way before w/o any problems


IMO 0 compression = stuck or bent valve (or a hole in a piston or something).

 

[wsa111]

Put 100# psi of air in the cylinder. Make sure valves are closed, air will go out the exhaust, intake or breather. Simple as that.
Hope its a valve adjusted too tight. Bill

 

[Lazy JW]

.... maybe I adjusted a valve too far down?

Hope so. Easy enough to fix.
Joe

 

[wallaka]

Backed the valves off a bit...TA DA!

Going for a drive now...

 

[grocery getter]

Backed the valves off a bit...TA DA!

Going for a drive now...

Sweet, it would have to be a really bad gasket for no compression.

props to.... wsa111,addo and mr. white














and bort

 

[Bort62]

Jesus... can't get no respect.

 

[wallaka]

Man, it runs a lot better now. Noticeably more power. This is the first time that it has broken the tires loose on dry pavement before. I have a Load-O and a carb with no SCV, so I disconnected the vacuum and popped in 15* or so of initial (total). Much better.

 

[wallaka]

Now I need a DS2 that isn't junk like the one I have now...LOL.

 

[mysavioreigns]

Grr...right when I think everything will be OK another problem comes up.

Understatement of the car...

Glad to hear you got it all worked out.

 

[grocery getter]

Now I need a DS2 that isn't junk like the one I have now...LOL.

8) 8) 8)

Wallaka, why do you have a politcal candidate avatar on a ford six site?

 

[wallaka]

Now I need a DS2 that isn't junk like the one I have now...LOL.

8) 8) 8)

Wallaka, why do you have a politcal candidate avatar on a ford six site?

I got tired of sporting the Bush one. It was fun for a while, but eh. It's about time to change this one anyhow, I'm getting tired of it.

 

[grocery getter]

Now I need a DS2 that isn't junk like the one I have now...LOL.

8) 8) 8)

Wallaka, why do you have a politcal candidate avatar on a ford six site?

I got tired of sporting the Bush one. It was fun for a while, but eh. It's about time to change this one anyhow, I'm getting tired of it.

while politics are a very important part of our society. I enjoy the escape that this site provides.
8) 8) 8)

 

[wallaka]

How's this?

 

[Bort62]

Just looks like a red X to me... but then most pictures do when I am at work

 

[grocery getter]

Just looks like a red X to me... but then most pictures do when I am at work

it's a triple carb 6...not too shabby 8)