May Day !! Down a cylinder - Page 3

philbilly · 04-29-2014, 11:32 AM

I believe it oil. It doesn't smell much like gas. I am headed to pressure check some things. Let u know Results shortly.

STK1217 · 04-29-2014, 11:48 AM

Quote:

Originally Posted by philbilly

Chuck we changed plugs and wires several times. I am thinking guide but if guide was wore it would show in leak down?
This is the new head we did fix. I busted one at gators.
Mb is gonna post up pic of plugs for me. I sent him pic of 1 and 7 plug so y'all could see

Just a question, How would a loose guide or bad valve seal show up in a leak down test?

philbilly · 04-29-2014, 12:12 PM

Quote:

Originally Posted by STK1217

Just a question, How would a loose guide or bad valve seal show up in a leak down test?

I wouldn't think it would beings it's above the seat. Wouldn't the spring hold the valve in the seat good.
If I knew the answer I wouldn't be on here. I am going to tear into the head I don't find nothing obvious I will have the pistons on the bench before I sleep I promise.

gbur · 04-29-2014, 01:27 PM

Quote:

Originally Posted by Dan Lattimore

Collapsed sealed power/speed pro style oil ring expander will do that and still show good leak . Just a thought ------

agree with the oil ring problem

Mike Taylor 3601 · 04-29-2014, 01:42 PM

Quote:

Originally Posted by philbilly

I wouldn't think it would beings it's above the seat. Wouldn't the spring hold the valve in the seat good.
If I knew the answer I wouldn't be on here. I am going to tear into the head I don't find nothing obvious I will have the pistons on the bench before I sleep I promise.

I think that is right next step,call me you need anything
Mike Taylor 3601

Dyno · 04-29-2014, 08:41 PM

I had a broken expander on the oil ring and it pumped oil like crazy. Pull the piston and you will find the problem. Dyno

Adger Smith · 04-30-2014, 12:06 AM

Did you say Speed Pro/ Sealed Power rings?
If they are:
Second ring installed upside down. Reverse twist is pushing oil up the cylinder.
Second choice would be the oil ring expander overlapped.
Have you rotated the firing order on the cap to be sure that there is one firing
cycle that is dead? I had a HEI kick my butt like that!!

JimL · 04-30-2014, 12:15 AM

What distributor do you have in it?

SS Engine Guy · 04-30-2014, 03:03 AM

Check valve springs on that cylinder.

philbilly · 04-30-2014, 07:32 AM

I have total seal rings. i have msd ignition I have changed every piece of it. I have done everything most has named twice. the piston is clean as a pin guys. there is no oil ,if a ring was bad enough to foul my plugs wouldnt you think there would be oil on top of piston.

i really appreciate all the advise but I am throwing in the towel for a couple days. I have some concrete to get poured now the rain is over.

hopefully be back in action by norwalk!

04-29-2014, 11:32 AM	#21
philbilly Member Join Date: Aug 2011 Location: Demossville,KY Posts: 337 Likes: 0 Liked 0 Times in 0 Posts	Re: May Day !! Down a cylinder I believe it oil. It doesn't smell much like gas. I am headed to pressure check some things. Let u know Results shortly.

04-29-2014, 08:41 PM	#26
Dyno Senior Member Join Date: Dec 2002 Posts: 878 Likes: 934 Liked 610 Times in 180 Posts	Re: May Day !! Down a cylinder I had a broken expander on the oil ring and it pumped oil like crazy. Pull the piston and you will find the problem. Dyno

04-30-2014, 12:06 AM	#27
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,363 Likes: 454 Liked 693 Times in 269 Posts	Re: May Day !! Down a cylinder Did you say Speed Pro/ Sealed Power rings? If they are: Second ring installed upside down. Reverse twist is pushing oil up the cylinder. Second choice would be the oil ring expander overlapped. Have you rotated the firing order on the cap to be sure that there is one firing cycle that is dead? I had a HEI kick my butt like that!! __________________ Adger Smith (Former SS)

04-30-2014, 12:15 AM	#28
JimL Junior Member Join Date: May 2013 Posts: 70 Likes: 0 Liked 0 Times in 0 Posts	Re: May Day !! Down a cylinder What distributor do you have in it?

04-30-2014, 03:03 AM	#29
SS Engine Guy Member Join Date: Sep 2003 Location: usa Posts: 256 Likes: 1 Liked 1 Time in 1 Post	Re: May Day !! Down a cylinder Check valve springs on that cylinder.

04-30-2014, 07:32 AM	#30
philbilly Member Join Date: Aug 2011 Location: Demossville,KY Posts: 337 Likes: 0 Liked 0 Times in 0 Posts	Re: May Day !! Down a cylinder I have total seal rings. i have msd ignition I have changed every piece of it. I have done everything most has named twice. the piston is clean as a pin guys. there is no oil ,if a ring was bad enough to foul my plugs wouldnt you think there would be oil on top of piston. i really appreciate all the advise but I am throwing in the towel for a couple days. I have some concrete to get poured now the rain is over. hopefully be back in action by norwalk!