Please help: I screwed up my 355 valvetrain. - Team Camaro Tech
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post #1 of 31 (permalink) Old Feb 3rd, 10, 04:38 PM Thread Starter
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Please help: I screwed up my 355 valvetrain.

Hey guys; I had a small exhaust leak; and I misdiagnosed it as a valvetrain rocker needing to be adjusted. There was nothing wrong with the valvetrain; but I thought there was. Therefore I readjusted all the valves; and was not aware that there was a polylock (alan key lock) inside of the nut after you adjust the valve. So i fixed my exhaust leak (header gasket); and the car ran like ****. I took off my valve cover and all of the rockers had fallen out; because I was not aware that there was a poly lock on these crane roller rockers.

the motor was built by somebody else before; I just misdiagnosed the exhaust leak as a valvetrain problem. Now here is the bad part.

When I took the valve cover off; all of the rocker and nuts were spewed everywhere. As can bee seen in the picture; one of the pushrods wont go down; it is up as i circled in red; the other in the back in down in the head; it is still loose and I can remove it. What does this mean? Hopefully I didn't cause any major damage to the lifters or something else? I was going to order new pushrods?? But still am not sure what the story is with these two pushrods that I have circled in red.


and maybe I need new rocker arms too?? Here is the picture of the ones that fell off. (they were obviously too loose; as I did not tighten the polylocks). They have small indentations on either side of the roller tip on the top.; do you think I'd need new ones?

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post #2 of 31 (permalink) Old Feb 3rd, 10, 04:42 PM
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Re: Please help: I screwed up my 355 valvetrain.

The lifter might have come out of the bore, Time to pull the intake, Have fun.
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post #3 of 31 (permalink) Old Feb 3rd, 10, 04:45 PM
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Re: Please help: I screwed up my 355 valvetrain.

and be sure to ckeck all rocker studs, You might have broken one lose?
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post #4 of 31 (permalink) Old Feb 3rd, 10, 04:54 PM
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Re: Please help: I screwed up my 355 valvetrain.

From the photo it also looks like the valve stem tips are hammered.

Sorry, but it looks like cam, lifters, pushrods, rockers, and valves.

I am also thinking about metal debris in the engine.

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post #5 of 31 (permalink) Old Feb 3rd, 10, 05:43 PM
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Re: Please help: I screwed up my 355 valvetrain.

You need to pull the intake for sure to make sure the lifters are in place and not damaged, then look for metal - drain the pan and see what you find there. Are you compfortable doing this kind of mechanical work including assessing the damage? If not you should get some help with it from someone who is before going further.

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post #6 of 31 (permalink) Old Feb 3rd, 10, 05:49 PM
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Re: Please help: I screwed up my 355 valvetrain.

WOW !
from what I see your valve stems are trashed
pushrods are probly bent.
rockers might be ok but IMO I would replace.
I little research and some help from us could have saved you these headaches and expenses.


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post #7 of 31 (permalink) Old Feb 3rd, 10, 06:00 PM
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Re: Please help: I screwed up my 355 valvetrain.

The valve stems may be able to be saved, they can be ground a little.

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post #8 of 31 (permalink) Old Feb 3rd, 10, 06:22 PM
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Re: Please help: I screwed up my 355 valvetrain.

You might be able to salvage the rocker arms depending on damage to the roller, would not worry about the body as marks can be polished down, just make sure roller is free to roll across the valve tip. Any idea what brand those rockers are?
As someone pointed out, those valve stems look boogered, to fix , they need to come out and be redressed , if they are not hit too hard. Valve man will tell you.
I see you still have those oil splash shields, not necessary if you have roller tip rockers. Might even look at valve springs and or retainers.

Need to look at those rocker arm studs for wear or damage . The top threaded end should be flat, not cupped. This is what helps lock down the allen screw in those poly locks. Need to make sure those allen set screws are not sticking out too far in nut barrel. This along with no rocker arm stud end flats, could have allowed the nuts to back off.
Yes, looks like you need to pull intake and see what else is bent or broke.

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post #9 of 31 (permalink) Old Feb 3rd, 10, 08:46 PM Thread Starter
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Re: Please help: I screwed up my 355 valvetrain.

hey guys; thanks i apreciate the help.

i pulled the intake and 2 of the lifters had come out. one of the holes that the lifters in was burred slightly so I took a small piece of sand paper and the lifter will go in fine now.

i am going to order new pushrods and intake gasket; im contemplating ordering new lifters too.
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post #10 of 31 (permalink) Old Feb 4th, 10, 12:01 AM
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Re: Please help: I screwed up my 355 valvetrain.

Quote:
Originally Posted by 12bolt View Post
hey guys; thanks i apreciate the help.

i pulled the intake and 2 of the lifters had come out. one of the holes that the lifters in was burred slightly so I took a small piece of sand paper and the lifter will go in fine now.

i am going to order new pushrods and intake gasket; im contemplating ordering new lifters too.
You better start fresh or your you'll be doing this again.new lifters & cam,push rods,rocker arms,and get your heads checked out.
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post #11 of 31 (permalink) Old Feb 4th, 10, 04:13 AM
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Re: Please help: I screwed up my 355 valvetrain.

X2
when lifters come out oil pressure goes to 0!


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post #12 of 31 (permalink) Old Feb 4th, 10, 04:18 AM
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Re: Please help: I screwed up my 355 valvetrain.

I agree, you need to do a complete tear down at this point - the sand paper to remove the burr in the lifter burr plus and other damage mean there's too much work and too much risk trying to put it back together without a tear down and clean up. You can put it back together only to find out you need to do it again with mains going out.

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post #13 of 31 (permalink) Old Feb 4th, 10, 04:52 AM
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Re: Please help: I screwed up my 355 valvetrain.

Get some real push rods as those ones are not made for guide plates.
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post #14 of 31 (permalink) Old Feb 4th, 10, 08:52 AM
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Re: Please help: I screwed up my 355 valvetrain.

I hate to say it bubba but if you know that little about the valve train you should get someone who does to diagnose and repair. The valve train is not somplace to learn on except the hard way. I mean this as nicely as I can.
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post #15 of 31 (permalink) Old Feb 4th, 10, 10:10 AM
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Re: Please help: I screwed up my 355 valvetrain.

Quote:
Originally Posted by Moonpie View Post
I hate to say it bubba but if you know that little about the valve train you should get someone who does to diagnose and repair. The valve train is not somplace to learn on except the hard way. I mean this as nicely as I can.
Big X2. get some help.

I have a buddy with a 65 Mustang who insists that you adjust all the valves without ever having to rotate the motor. He argues with me and its obvious he has no clue. I guess I will let him find out the hard way. He just got a new 302 from ford and hes not even going to determine TDC before he starts it, even though I offered to lend him my tool.

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