I have re-adjusted the rockers already, and NONE were loosePull your valve covers and check the RRs to make sure they are not loose.
I sure hope it's a lifter, i ordered new ones and new pushrods just to make sure.wow that does not sound good... to me it sounds like a lifter tap r rod knock... pull the valve covers and check your RR's
I will triple check the geometry and re-start it before pulling the motor.Definatly a valvetrain noise. Sounds like rockers set wrong to me. Do them over and if you don't know how to properly do it, have someone help. Check for bent pushrods too.
1k on the motor i hope it doesent have to come out, a piston problem sounds like that too?+1 on valvetrain noise.
A rod hammering would have a deeper tone than that.
It's not any better for you but it could be a wrist pin or broken piston.
Sounds like the engine is going to have to come back out. How many miles are on it?
I wish they could just go tighter, i torqued them to 23 FT LBS like stated in the hayes book.I vote rockers!! And that is a good thing if u dont have to tearn down the whole engine. Just get them tighter and I bet it goes away!
I live in Fontana, I will also pay for your gas if you come and help me figure this out, plus all the BBQ you can eat and ALL the beer you can eat plus bring your wife or G/F to keep my G/F company.Dude it's a RR, I swear I just went through the exact same sound a few months ago. Where exactly do you live? I will come out and readjust your valvetrain if your willing to help... I'm not kidding either. Put you hand directly over where the sound is comming from, your going to feel it.
The weekend is my only good time. Let me know. Ohh yeah you have to buy the beer and pizza.
Since you have already checked your rockers and pushrods the only way to find out would be pulling the motor apart I'm afraid. You can get a stethascope (I'm not sure about my spelling) and check different areas on the block and around the timing cover to isolate where the noise is coming from but it sounds like a internal engine problem to me.
Who built the engine? I see that it is a CHP 331 street fighter from one of your earlier threads but was it a stroker kit or the complete short block. The fact you still have oil pressure is encouraging. How did the compression test turn out? I hate that you are having this problem seeing how you spent a good amount of money on some nice parts and you haven't got to drive it much. This could still be fairly minor but but it more than likely is in the bottom end of the motor.
It was a CHP Street fighter shortblock built by CHP im 05' so it's out of any kind of warrantee if it had one.
Good luck!
been years since I have heard a rod knock so I cant really comment on that. But it does sound like valvetrain. Did you get ped. or stud heads? I cant comment on ped. heads as I've never had them on my car since I've owned it. But yea a loose stud mount rocker can do that. Did you make sure to back off the allen locks in the rocker retainers before adjusting? and then tighten down the locks afterwards? I guess you couldent check the lifters but you may have a bad one. Also, if a pushrod is bent you may not see it with your eye but if you roll it on a glass table you will know right away.
So, are they pedestal mount or stud mount? I'm assuming pedestal, as you mentioned a torque spec. Pedestal mount ones need shims to make the adjustment. Too many shims and you get valvetrain noise. Too few, and you get valves hanging open.
Has it made the noise for the entire 1000 miles?
Wristpins/pistons slapping sound a bit like that. I was going to say earlier though that the noise seems to be slower than engine speed. (Cam runs at 1/2 crank rpm.) Kinda leans me to the valvetrain. That should be good for you.
I live in Fontana, I will also pay for your gas if you come and help me figure this out, plus all the BBQ you can eat and ALL the beer you can eat plus bring your wife or G/F to keep my G/F company.This is why i love stangnet, it's better than friends sometimes.
I got ped. heads, i will take the pushrods and roll them on glass to make sure they are not bent.
Rember glass is a liquid... let me know what size pushrods you are using i have a extra set of stock size...
I went back and listened to it again and you know I think everyone else is right it does sound like a very loose rocker but I am a little bit puzzled. A pedestal mount rocker that is tightened and doesn't come loose can't create extra clearance on its on unless a pushrod bends or flattens out on the end correct?
I believe he is using his stock valve covers, I doubt he has taken the splash guard inside of it out, that will make a RR tap for sure. All the rr has to do is loosen up a bit and it'll tap that, most RR wont fit under them in the first place, unless they are the comp pro mags. That's why you see alot of fox VC's on our cars.
What size RR's 1.6's or 1.7's? Either will touch, one just more than the other.
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