When torqueing the rockers...
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Launching!
Joined: Mar 2004
Posts: 290
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From: Austin
When torqueing the rockers... I put my rockers back on last night and did exactly what the ls1howto guide says but seems odd to me that you dont have to have them all TDC before you torque them to 22lbs...
Did I do it right by putting them all on w/ locktite, torqued all down to 22lbs and them turned the crank 180* and checked the torque again... Am I good to go?
Did I do it right by putting them all on w/ locktite, torqued all down to 22lbs and them turned the crank 180* and checked the torque again... Am I good to go?
Originally Posted by tuffass
Sweet, i think it because its a hydolic roller that you can do this. Right?
BTW sig pic size is 500x150 max, might wana resize yours.
Originally Posted by DONAIMIAN
Nope, it would be the same if it was a solid lifter.
BTW sig pic size is 500x150 max, might wana resize yours.
BTW sig pic size is 500x150 max, might wana resize yours.
Ben T.
Originally Posted by Studytime
I've trashed some of those crappy Jesel rockers by doing this. With shaft mount rockers (solid roller stuff) it's very important to have the cylinder you're working on at TDC. The spring pressures will cause the bar to bind and tear it up. On stud rockers this doesn't appear to be a concern, unless you have really stiff springs and stand the chance of getting a bad torque reading from compressing the spring instead of torquing the rocker.
Ben T.
Ben T.
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Just for my peace of mind, I only torqued down the stock rockers with the cylinders at TDC. I figured this would help keep things consistent. It doesn't take long since the spark plugs are already out. You can do 4 rockers at a time and it only takes an extra minute or two to spin the motor in between. Once they were all on, I rotated the motor some, brought the first cylinder back to TDC, and made a second pass to check the torque. Like I said...for my peace of mind.
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Launching!
Joined: Mar 2004
Posts: 290
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From: Austin
The are the stock rockers. Not aftermarket. and i followed the instructions exact. I did check the torque after setting them all at 22 ft lbs and they are all still the same after turning 180*.
I guess my question is, Did i do this right for using the stock rockers?
I guess my question is, Did i do this right for using the stock rockers?
TECH Fanatic
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From: Orange Park/ Jacksonville, FL
Originally Posted by SSpdDmon
Just for my peace of mind, I only torqued down the stock rockers with the cylinders at TDC. I figured this would help keep things consistent. It doesn't take long since the spark plugs are already out. You can do 4 rockers at a time and it only takes an extra minute or two to spin the motor in between. Once they were all on, I rotated the motor some, brought the first cylinder back to TDC, and made a second pass to check the torque. Like I said...for my peace of mind.
Everyone seems to do them this way, but it is not to the service manual procedure. The service manual tightens only those on the base circle, turn 360 and then tighten the rest.
TECH Senior Member
Joined: Mar 2004
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From: BFE
Originally Posted by vettenuts
Everyone seems to do them this way, but it is not to the service manual procedure. The service manual tightens only those on the base circle, turn 360 and then tighten the rest.
Most of the time I do TDC, crank a few times with starter check trq again. Never had an issue but had trq adjustments on certain ones.
So with this discussion, I have a question...
The first time I installed my Harlands, I made sure to have #1 at TDC to check preload. After that, I simply installed the remaining pairs of rockers regardless of the cylinders being at TDC.
That being said, I'm thinking I might go back and re-move/re-install mine with all cylinders at TDC. Originally I was unaware it was an issue, but being a bit of a stickler for details, I'd like to install and torque all of them correctly.
So what is the easiest way to determine when all cylinders are at TDC? I found #1 simply by watching the springs/rockers themselves. Seems like there should be a more accurate method for this.
Or is it even that big of issue? I checked torque on all pairs at least three times and they were good. Should I go back and doing it again?
Help me out guys.
Thanks!
The first time I installed my Harlands, I made sure to have #1 at TDC to check preload. After that, I simply installed the remaining pairs of rockers regardless of the cylinders being at TDC.
That being said, I'm thinking I might go back and re-move/re-install mine with all cylinders at TDC. Originally I was unaware it was an issue, but being a bit of a stickler for details, I'd like to install and torque all of them correctly.
So what is the easiest way to determine when all cylinders are at TDC? I found #1 simply by watching the springs/rockers themselves. Seems like there should be a more accurate method for this.
Or is it even that big of issue? I checked torque on all pairs at least three times and they were good. Should I go back and doing it again?
Help me out guys.
Thanks!
Grab a friend and have them shove their finger in the spark plug hole. Pressure should build until the piston reaches TDC. That plus watching the valvetrain is how we did it. 
I do one cylinder at a time. I just hand crank the engine until the exhaust valve opens and closes and then the intake valve opens and closes. After the intake closes the piston is on the compression stroke. Once it closes i torque both rockers, hand crank a few times and get back on compression again and recheck. Then I move on to the next cylinder and do it over again.
Originally Posted by brad8266
I do one cylinder at a time. I just hand crank the engine until the exhaust valve opens and closes and then the intake valve opens and closes. After the intake closes the piston is on the compression stroke. Once it closes i torque both rockers, hand crank a few times and get back on compression again and recheck. Then I move on to the next cylinder and do it over again.
Might just have to get someone to give me a hand and go at re-checking them.
Thanks!