Brocken rocker
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 768
Likes: 25
From: Cape Cod
Brocken rocker
Well after getting the code 0300 engine misfire and car running like crap..i decided to check it out ...after going thru heck trying to find out if its the plugs, wires, maf and on and on and on to nothing... the #4 cylinder (on the header ) was not as hot as the others decided to remove the valve cover and see if it was a broken valve spring.
instead of a spring i found a good chunk of the intake rocker split by the push rod...nice clean brake no metal chips at all...any suggestions why ? and should i change only that pair? the rest look as good as when i replace them last year....by the way they are the yalla terra 1:7 rockers...
instead of a spring i found a good chunk of the intake rocker split by the push rod...nice clean brake no metal chips at all...any suggestions why ? and should i change only that pair? the rest look as good as when i replace them last year....by the way they are the yalla terra 1:7 rockers...
Former Vendor
Joined: Feb 2004
Posts: 10,876
Likes: 8
From: Las Vegas NV
St. Jude Donor '06 & '12
WOW!!!!
I havent seen a YT rocker failure in forever and a day.. Are they the new ultralight rocker? Or are they the early design?
I wouldnt worry about changing them all. Just that cylinder. But I would definately have YT look into it for you. Also, check out your valvetrain. Make sure you didnt have a lifter failure, that caused your rocker to fail. Make sure your PR isnt bent.
I havent seen a YT rocker failure in forever and a day.. Are they the new ultralight rocker? Or are they the early design?
I wouldnt worry about changing them all. Just that cylinder. But I would definately have YT look into it for you. Also, check out your valvetrain. Make sure you didnt have a lifter failure, that caused your rocker to fail. Make sure your PR isnt bent.
Well after getting the code 0300 engine misfire and car running like crap..i decided to check it out ...after going thru heck trying to find out if its the plugs, wires, maf and on and on and on to nothing... the #4 cylinder (on the header ) was not as hot as the others decided to remove the valve cover and see if it was a broken valve spring.
instead of a spring i found a good chunk of the intake rocker split by the push rod...nice clean brake no metal chips at all...any suggestions why ? and should i change only that pair? the rest look as good as when i replace them last year....by the way they are the yalla terra 1:7 rockers...
instead of a spring i found a good chunk of the intake rocker split by the push rod...nice clean brake no metal chips at all...any suggestions why ? and should i change only that pair? the rest look as good as when i replace them last year....by the way they are the yalla terra 1:7 rockers...
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 768
Likes: 25
From: Cape Cod
WOW!!!!
I havent seen a YT rocker failure in forever and a day.. Are they the new ultralight rocker? Or are they the early design?
I wouldnt worry about changing them all. Just that cylinder. But I would definately have YT look into it for you. Also, check out your valvetrain. Make sure you didnt have a lifter failure, that caused your rocker to fail. Make sure your PR isnt bent.
I havent seen a YT rocker failure in forever and a day.. Are they the new ultralight rocker? Or are they the early design?
I wouldnt worry about changing them all. Just that cylinder. But I would definately have YT look into it for you. Also, check out your valvetrain. Make sure you didnt have a lifter failure, that caused your rocker to fail. Make sure your PR isnt bent.
Racer
Joined: Mar 2007
Posts: 347
Likes: 0
From: Whiteville NC
are you using stocker lifters? What RPM are you turning this engine?
I had a set of Scorpians fail using stock lifters and finally detemined after talking to LOTS of people that it was because newish stockers are only good for about 6800 rpm.
I had a set of Scorpians fail using stock lifters and finally detemined after talking to LOTS of people that it was because newish stockers are only good for about 6800 rpm.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Well after getting the code 0300 engine misfire and car running like crap..i decided to check it out ...after going thru heck trying to find out if its the plugs, wires, maf and on and on and on to nothing... the #4 cylinder (on the header ) was not as hot as the others decided to remove the valve cover and see if it was a broken valve spring.
instead of a spring i found a good chunk of the intake rocker split by the push rod...nice clean brake no metal chips at all...any suggestions why ? and should i change only that pair? the rest look as good as when i replace them last year....by the way they are the yalla terra 1:7 rockers...
instead of a spring i found a good chunk of the intake rocker split by the push rod...nice clean brake no metal chips at all...any suggestions why ? and should i change only that pair? the rest look as good as when i replace them last year....by the way they are the yalla terra 1:7 rockers...
Why not go back to stock? I have been running the same stock 01 rockers and making 600+ hp and have ran it up to 850 rwhp...rev limiter set to 6750. Now that I said that watch me break one.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 768
Likes: 25
From: Cape Cod
GM Racing lifters at 6800 RPM
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 768
Likes: 25
From: Cape Cod
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