Valvetrain Knocking sound, and Rocker Stud questions [PICS]
02-17-2007, 09:01 AM
#41
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Originally Posted by AMERICAN_HP
Thanks for the valueable (yet sarcastic) info. 
Since I have the motor apart, I will be verifying the PR length AND posting the info.
If the PR lengths are actually 7.50 I will be elated. I am willing to bet the farm its incorrect, but I am hoping its actually right.
As for the sealer on the intake side of the rockers. I am very aware of that. (believe it or not, I use the search function quite often) In this case, it looks like red RTV was used (looks like it at least). Not saying thats bad, I'm just mentioning it.
Also, I know 100% how to check the stud torque measurements.
I think your getting a few things mixed up. I didnt say the torquing of the rockers threw off the geometry. Theres 2 things going on with these heads. 1) PR length looks too long (as indicated in the wipe pattern.) 2) The lifter preload was out of this world. This looks to have been bottoming out the lifter and causing the loud knocking sounds. (At least thats my assumption at this point.)
"IF" the PR's were too long, and the preload to high, should I replace my lifters?? Even if they dont show any severe signs of damage?
Is there ANYTHING else I should be looking for?
One more thing.. Exactly "What" section do you reccomend for technical questions?? Its not like you guys are talking about splitting Atoms in this section.. I mean Jesus, I had questions about valvetrain issues, not how to tie my fuking shoes.. 
J/K
Since I have the motor apart, I will be verifying the PR length AND posting the info.
If the PR lengths are actually 7.50 I will be elated. I am willing to bet the farm its incorrect, but I am hoping its actually right.
As for the sealer on the intake side of the rockers. I am very aware of that. (believe it or not, I use the search function quite often) In this case, it looks like red RTV was used (looks like it at least). Not saying thats bad, I'm just mentioning it.
Also, I know 100% how to check the stud torque measurements.
I think your getting a few things mixed up. I didnt say the torquing of the rockers threw off the geometry. Theres 2 things going on with these heads. 1) PR length looks too long (as indicated in the wipe pattern.) 2) The lifter preload was out of this world. This looks to have been bottoming out the lifter and causing the loud knocking sounds. (At least thats my assumption at this point.)
"IF" the PR's were too long, and the preload to high, should I replace my lifters?? Even if they dont show any severe signs of damage?
Is there ANYTHING else I should be looking for?
One more thing.. Exactly "What" section do you reccomend for technical questions?? Its not like you guys are talking about splitting Atoms in this section..
I mean Jesus, I had questions about valvetrain issues, not how to tie my fuking shoes.. J/KWhat's funny is your cocky attitude and obvious ignorance when it comes to your engine. I wonder why the obvious has'nt been pointed out to you yet..... please keep posting, I'm enjoying this.
Are you going to use a 1/4" ratchet to break the heads lose??? What happened to pulling the engine, nobody could help you?
Looks like you're running out of shops to work on your car, time to buy some tools. T handles...... LMAO
02-18-2007, 01:58 PM
#42
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Your entitled to your own opinion.
Thank you for your informative technical assistance.
Thank you for your informative technical assistance.
Originally Posted by 2c5s
What's funny is your cocky attitude and obvious ignorance when it comes to your engine. I wonder why the obvious has'nt been pointed out to you yet..... please keep posting, I'm enjoying this.
Are you going to use a 1/4" ratchet to break the heads lose??? What happened to pulling the engine, nobody could help you?
Looks like you're running out of shops to work on your car, time to buy some tools. T handles...... LMAO
Are you going to use a 1/4" ratchet to break the heads lose??? What happened to pulling the engine, nobody could help you?
Looks like you're running out of shops to work on your car, time to buy some tools. T handles...... LMAO
02-18-2007, 06:07 PM
#43
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Originally Posted by AMERICAN_HP
Your entitled to your own opinion.
Thank you for your informative technical assistance.
Thank you for your informative technical assistance.
Humility, I like it.
02-19-2007, 08:06 AM
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I haven't read the entire post in detail yet, but I'd like to throw out a few
questions:
Who assembled the engine? Were the pistons and gasket considered for
boost when selecting parts? What is the volume of the piston dish/valve
reflief? What are the SCR and DCR calculations with your camshaft?
The quench height seems awfully high for this motor.
Pre-load has a significant impact on performance. It would be wise to upgrade
to an adjustable system, especially with a full scale rebuild and cam swap.
The amount of pre-load does indeed effect valve lift if the seat is allowed to
pump up. This can cause PTV issues and spring bind amongst other things.
Thermal expansion must also be considered for the final pre-load setting. You
can use feeler gauges, and/or a dial to measure this.
Pre-load should also be checked at operating temperatures regardless of
solid/hydraulic lifter type. This may have contributed to the issue.
questions:
Who assembled the engine? Were the pistons and gasket considered for
boost when selecting parts? What is the volume of the piston dish/valve
reflief? What are the SCR and DCR calculations with your camshaft?
The quench height seems awfully high for this motor.
Pre-load has a significant impact on performance. It would be wise to upgrade
to an adjustable system, especially with a full scale rebuild and cam swap.
The amount of pre-load does indeed effect valve lift if the seat is allowed to
pump up. This can cause PTV issues and spring bind amongst other things.
Thermal expansion must also be considered for the final pre-load setting. You
can use feeler gauges, and/or a dial to measure this.
Pre-load should also be checked at operating temperatures regardless of
solid/hydraulic lifter type. This may have contributed to the issue.
