Plenum leak aftermath: suggestions/ help?
Champion
Joined: Apr 2007
Posts: 2,570
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I've gotten to the bottom of this. The truck had run for so long with a damaged plenum, all the oil was getting sucked into the runner going to the number one cylinder which developed a bad knock, and the plug gets fouled after a couple hundred km. I have been running the motor with no #1 cylinder, and it runs fine, so I know where the problem lies! When you accelerate under normal load, it runs great. As soon as there is any load ( a hill or you hammer down the gas a bit) the engine makes a loud consistent knock.... the same knock that came from the #1 cylinder when it was hooked up. Mind you, when the #1 cylinder IS hooked up it makes this noise ALL the time.
My thoughts are:
The #1 cylinder is so badly fouled up it wont run right
The rings are gone ( yet I did a compression test and it was 110-120 psi )
I need some suggestions of a product I can pour in that cylinder in hopes to free it up and cure ( or bandage ) the problem at hand.
The injector on that cylinder has been replaced, and the intake was cleaned very well when I had it off.
Also, the last 2 oil changes I ran 4L oil the rest ATF, and have been getting fair sized chunks of carbon out, so I know she's dirty haha.
My thoughts are:
The #1 cylinder is so badly fouled up it wont run right
The rings are gone ( yet I did a compression test and it was 110-120 psi )
I need some suggestions of a product I can pour in that cylinder in hopes to free it up and cure ( or bandage ) the problem at hand.
The injector on that cylinder has been replaced, and the intake was cleaned very well when I had it off.
Also, the last 2 oil changes I ran 4L oil the rest ATF, and have been getting fair sized chunks of carbon out, so I know she's dirty haha.
That leak (plenum)
Thread Starter
|
Professional
Joined: May 2008
Posts: 243
Likes: 1
From: Ontario, Canada
HAD run lol... and is no longer running with a plenum leak, but as a result of running for so long WITH a leak, this carbon has built up in the cylinder. The plenum was fixed back in July, I'm just trying to clean the mess the leak left behind.
Champion
Joined: Aug 2005
Posts: 3,313
Likes: 8
another option:
http://www.etoolcart.com/browseprodu...-OTC7904A.html
but myself I think the official $8 spray can of
Chrysler 'Combustion Chamber Cleaner'
works well.... it is a foam
http://www.etoolcart.com/browseprodu...-OTC7904A.html
but myself I think the official $8 spray can of
Chrysler 'Combustion Chamber Cleaner'
works well.... it is a foam
Thread Starter
|
Professional
Joined: May 2008
Posts: 243
Likes: 1
From: Ontario, Canada
So. I let some more fuel conditioner sit in the chamber for a few days. Fired the truck up and the knock was still there. I left the cylinder unplugged for the last few weeks. Yesterday, I was on empty so I put in 1/4 tank of 94. I headed over to my friends house to hang out for a bit. While I was there I told him to come out and listen to the knock on that one cylinder. I popped the hood and reconnected the plug wire and injector. When I started the truck... no knock! NOTHING! It was totally gone. I drove around for about 15min, and still no knock! Over the past day, I've heard the knock maybe 3 times, but thats all.... and it used to knock every few seconds!
Better gas?
Better gas?
Thread Starter
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Professional
Joined: May 2008
Posts: 243
Likes: 1
From: Ontario, Canada
SOOOOOOOO!
I pulled the valve cover, and found a rocker with a pushrod through it!!!! It's now fixed and back together!
I've still yet to drive it, but the exhaust had a funny little inconsistency in it.... sounded like it was running normal then every 10 sec or so there was a little fire in between... who knows. I'm gonna change the oil again this afternoon and take it for a drive see if its any better than before.
WHAT WOULD CAUSE A PUSHROD TO GO THROUGH A ROCKER???
1. Bad / low oil?
2. A bad misfire ?
3. A plenum that leaked for years on that particular cylinder?
I feel like I've somewhat solved the problem
I pulled the valve cover, and found a rocker with a pushrod through it!!!! It's now fixed and back together!
I've still yet to drive it, but the exhaust had a funny little inconsistency in it.... sounded like it was running normal then every 10 sec or so there was a little fire in between... who knows. I'm gonna change the oil again this afternoon and take it for a drive see if its any better than before.
WHAT WOULD CAUSE A PUSHROD TO GO THROUGH A ROCKER???
1. Bad / low oil?
2. A bad misfire ?
3. A plenum that leaked for years on that particular cylinder?
I feel like I've somewhat solved the problem
