Non milled gt40p install. Pushrod Problems.

[rio95]

Well, my car is almost done (HCI). The only thing that I was uncomfortable with was the pushrods. This is what happened:


I lined the cam sprocket and crank dot to dot, therefore I went ahead and put the #1 rockers on using the stock pushrods. I thightened it down by hand, then torqued it to about 21lbs. they both seemed fine. Then I went to #3 after rotating the crank 90 degrees and when I thightened one of the rockers to spec, I could jiggle the rocker quite a bit. So I decided I'll probably have to use the 6.3 rods I bought just in case. So I started over and put all of them on. My only concern is that most of the rockers were pushing the springs down a bit before I hit the torque spec. The one that was previously loose felt good now though. So for a while I could not decide which rods to use, becuase it seemed to vary as I went through the order. Do you think I'll be alright? Is it better to be a hair short or a hair long?

Also, I did prime the oil system before installing them. With the new rods, they all seemed fine. Then about 5 hrs later, I wiggled one of the rockers and discovered that they all had a touch of play in them. Are they supposed to wiggle at all? I'm guessing that the oil in the lifter hand drained away causing the rockers to become looser. I was just skeptical of putting the valve covers on.

So should I stick with the 6.3's that I have in there or go back to the stock ones?


Sorry for the length, but I'm finishing my car tomorrow, so I need to make sure asap that I am good to go ahead.

thanks


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[final5-0]

If you had the roller on the heel of the lobe and saw the valve spring compress when you went tight with the hold down bolt, that is not like things should be.

The idea is that you only compress the insides of the lifter by a very small amount.

If the valve spring is compressing, that would mean you are totally compressing the inside of the lifter.

If everything is just as it should be with the valve train it is normal to be able to move the rocker with a side to side movement but not up and down.

Go here for valve adjustment help

http://www.flowtechinduction.com/

Later
Grady

 

[rio95]

I forgot to add that I am using stock rockers.

 

[rio95]

so maybe I should put the stock ones back in??

 

[final5-0]

so maybe I should put the stock ones back in??

I'm not trying to be a smart azz but it looks like your looking for ...... just an an answer.

It was my intent to share some knowledge that would enable you to be confident with a solution you arrived at based upon the things you saw and experienced.

Communicate with details and you'll get all kinds of help not only from me but lots of other peeps who have done what you are doing.

You say "maybe" I should .............

I say "maybe" is a word you don't wanna use when working with valvetrains.

I really do wish to help and I also am willing to take the effort to help you understand what I suspect is going on with your valve train. The way I understand things...... by your description ...... its not a good situation.

Are you in fact compressing the valve spring while the roller is on the heal of the cam lobe as you tighten bolt?

Later
Grady