bent pushrod ?

[JDHedman]

Ok yesterday I was out havin some fun in the Camaro and did a hard launch and the I started hearing a ticking.

its not constant but it a noticeable metal ticking. seems to be louder around 2k rpm.

any ideas before I go pullin the pushrod's?

http://www.youtube.com/watch?v=UuEyKWGHW2k

http://www.youtube.com/watch?v=BGJhxb31SEM


pulled the valve covers off. everything looks normal to me..? nothing seems to be loose,

anyone have any other ideas before i go pullin these things out?

and how do i tell the length if i do need new ones?

do i need any specialty tools to put these back in?
anyone know of a good write up on install?

you just pull the plugs and start on cyl 1 at tdc right?


oh and FML
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[Eagle]

lifter probably. pull out all the pushrods and roll them on a glass (straight and true) surface to verify they're all straight.

 

[Eagle]

As far as "starting" goes... not sure what you mean. To replace the pushrods (stock length is 7.400") all you do is pull the rockers, remove all the pushrods and reverse the process. Rocker arm bolts get torqued to 20lbft.

 

[Bru]

What aftermarket valvetrain parts are you running?

 

[JDHedman]

right on, thanks for the info. I am use to the lt1 and older were you have to set lash

 

[Eagle]

right on, thanks for the info. I am use to the lt1 and older were you have to set lash

You bet!

 

[Turk]

Is it possible to bend a pushrod by launching hard? I thought that was only possible by mechanically overrevving the motor.

 

[JDHedman]

7638 comp cam magnum pushrods idk on anything else most the upgrades were done when i bought it from the dealer ( auto showcase )

pushrods are all straight... idk? anyway to check the lifters without pullin off the heads?

 

[OffshoreDrilling]

anyway to check the lifters without pullin off the heads?

Unfortunately, no. If there is no metal shavings in your oil, and you still have oil pressure, its almost definitely not a spun bearing. Which leaves the lifters or possibly a fucked up piston(still kinda ruled out by no metal shavings).

It has aftermarket pushrods, and it could possibly have aftermarket lifters as well. Either way, it has been taken apart before, and the pushrods may not be the correct length or lifter preload is/was not set correct causing one to collapse.

 

[JDHedman]

oil was clean. pushrods are straight. changed out the header/manifold gaskets and put it all back together and it was still there. tonight i pulled the pass side head off and got the lifters out. they all look good to me, I will pull the drivers side off later this week.

sorry for the crappy pics didnt bring my camera

don't know if the lifters are stock.. the pushrods are comp cam magnums stock length

and the lifters have different numbers on them four are "tr3" three are "tr4" and one is "tr5" i am hoping they don't have specific locations as my dumb ass didn't note were they came from

 

[Eagle]

lifters can go back in any location, but make sure you put them in with the oil drains towards the bottom.

Hopefully you find it on the other side.

 

[Runtz52]

easier way to check for a bad lifter before u go tearin shit apart next time is to just push on the rocker arm on the push rod side, see if any give more than the others. well good luck gettin her back together and findin ur issue

 

[Eagle]

Yea, you're going to want to check the individual plungers on each lifter as you take them out as well. See if any one (or more) of them acts differently than the rest.

 

[bikrboy128]

flexplate?

 

[JDHedman]

so if it turns out its not bad lifters or flywheel i am going to put it all back together and bring it in for a diagnostic test. but i am thinking of maybe replacing the lifters and rockers even if they are not the problem. would i benifit in anyway.



looking at these


98-02 Comp Cams High Energy Hydraulic Roller Lifters

and


LS1 Scorpion Performance Pro Series Roller Rocker Arms - 1.8

and getting new head bolts, gaskets, plugs and wires

 

[ktraver97ss]

Pugs....those are cute dogs.

hehehe

 

[Eagle]

Stock caddy/LS7 lifters, cheap and lowest failure rate of most any after market lifter out there. As for the rockers, I'd leave the stockers in there until you determine what's up.

Flexplate is a possibility...

 

[bikrboy128]

pull the inspection plate off and turn the crank. i've seen 5.7l chevys crack their flexplate, and it sounds similar to rod knock. they usually crack near the center.
you did a hard launch, you could've stressed it too much.

 

[Bad00SS]

I have LS7 lifters and been shifting the car at 7,000 rpm for years. no issues at all.

 

[Eagle]

I have LS7 lifters and been shifting the car at 7,000 rpm for years. no issues at all.

 

[JDHedman]

ok so from what I can tell all the lifters and pushrods are good. I am about out of ideas and am gettin lazy. I am gonna get some new gaskets and put this thing back together.
I dont want to keep taking shit apart to find thats not the problem.

so were should i bring this thing? I just want someone to tell me what the problem is and I can take it from there. and how much should I expect to pay for them to tell me whats wrong?

thanks again for all the help

 

[skeezer]

modern muscle

 

[modern-muscle]

Yea man give us a call we can figure it out for you and get your parts a pretty good price. And at that point if you want the car back to do the work your self then we can do that, but we will also give you a price to complete the job. Give us a call when you get a spare second. 630-898-5933

 

[Fish]

Yea man give us a call we can figure it out for you and get your parts a pretty good price. And at that point if you want the car back to do the work your self then we can do that, but we will also give you a price to complete the job. Give us a call when you get a spare second. 630-898-5933

Thats fucking awesome.

 

[JDHedman]

Yea man give us a call we can figure it out for you and get your parts a pretty good price. And at that point if you want the car back to do the work your self then we can do that, but we will also give you a price to complete the job. Give us a call when you get a spare second. 630-898-5933

I will most definitely do that.