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Re: Firing issues
[Re: Texas383]
#2193855
11/10/16 12:20 PM
11/10/16 12:20 PM
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Joined: Jan 2003
Posts: 678
Marshall TX
Texas383
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 678
Marshall TX
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Bought a compression gauge and took a reading or two yesterday evening.
I took the readings with engine cold and just turning it over and not with engine running. With a deeply saddened heart I discovered that #3 only had 30psi. I tested #7 and it had 110psi. I have to assume #6 has low compression as well.
Now....moving forward. Did this eat up just rings or the cylinder wall too? The block is bored 060 and I need to know if I can just re-ring or what...?
1969 Y2 Super Bee
1959 Coronet 4 dr Sedan
~ I intend to live forever...so far so good! ~
TO GOD BE THE GLORY!!
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Re: Firing issues
[Re: Texas383]
#2193859
11/10/16 12:27 PM
11/10/16 12:27 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Bought a compression gauge and took a reading or two yesterday evening.
I took the readings with engine cold and just turning it over and not with engine running. With a deeply saddened heart I discovered that #3 only had 30psi. I tested #7 and it had 110psi. I have to assume #6 has low compression as well.
Now....moving forward. Did this eat up just rings or the cylinder wall too? The block is bored 060 and I need to know if I can just re-ring or what...? Won't know until you take it apart. Why is it bored .060 over already? Was it bored twice to get to .060 over? I thought it was a original motor...I guess not. I have done plenty off re hones and re rings without a bore job with good success. Sorry to hear, more than likely both are worn. Squirt some oil in the spark plug hole and retest. If the numbers go up then it's saying the rings are worn. If not then the valve seal is bad.
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Re: Firing issues
[Re: Texas383]
#2193908
11/10/16 01:20 PM
11/10/16 01:20 PM
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Joined: Jan 2003
Posts: 678
Marshall TX
Texas383
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 678
Marshall TX
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It's not the original motor... but it is a 1969 HP motor that was in a '69 Road Runner. I rebuilt and put the motor in back in '89. It needed a 030 over bore then. Back in 2000 I rebuilt again and it needed 060.
1969 Y2 Super Bee
1959 Coronet 4 dr Sedan
~ I intend to live forever...so far so good! ~
TO GOD BE THE GLORY!!
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Re: Firing issues
[Re: Texas383]
#2194148
11/10/16 06:53 PM
11/10/16 06:53 PM
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Joined: Jan 2003
Posts: 678
Marshall TX
Texas383
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 678
Marshall TX
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I would guess in the 30K range(speedo was broken for a few years and gear change when speedo worked)
1969 Y2 Super Bee
1959 Coronet 4 dr Sedan
~ I intend to live forever...so far so good! ~
TO GOD BE THE GLORY!!
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Re: Firing issues
[Re: Texas383]
#2194175
11/10/16 07:41 PM
11/10/16 07:41 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Gotcha, sucks 30 is low miles.
I am betting with that low of miles you can rehone and re ring and it will be fine.
Last edited by Challenger 1; 11/10/16 08:34 PM.
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Re: Firing issues
[Re: Texas383]
#2194179
11/10/16 07:48 PM
11/10/16 07:48 PM
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Joined: Jun 2006
Posts: 5,169
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,169
CT
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30 psi is way low I think you have a burned valve on that cylinder...
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Firing issues
[Re: Texas383]
#2194205
11/10/16 08:24 PM
11/10/16 08:24 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Or a set of Edelbrock heads
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Firing issues
[Re: Texas383]
#2194631
11/11/16 11:46 AM
11/11/16 11:46 AM
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Joined: Jan 2003
Posts: 678
Marshall TX
Texas383
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 678
Marshall TX
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It's not smoking any or getting oil on the plug.... so would that eliminate the rings being gone?
Sadly it will have to be after the Holidays and the New Year before I can do anything about it. Plus an impending move in 2017.
One thing after another it seems sometimes....
1969 Y2 Super Bee
1959 Coronet 4 dr Sedan
~ I intend to live forever...so far so good! ~
TO GOD BE THE GLORY!!
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I was just trying to minimize the situation for the OP.