Clanking Noise Coming Out Pass. Side Header????

Posted By: MRMOPAR622

Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 01:32 AM

Just finished building 540 cu in with 440-1 heads cr 15-1 Comp Roller Camshaft running a toilet bowl on alcohol. When engine temp gets up around 170 degrees there is a clank sound, like you take a wrench & hit the tool box sound, but it's not from bearings or valve train sound, sounds more like a convertor bolt or starter engaging, coming out passenger side header. The header gasket does not appear to be leaking can not find any leaks in header, we pulled the header off the car to check it, flywheel torque converter bolts are not loose or hitting on anything, starter gear and flex plate are both new & show no scars, remove valve cover, the rockers are not hitting valve covers no broken valve springs, valve spring retainers not touching rocker arms, valve lash is perfect push rods are not hitting or rubbing anywhere on heads. I have the timing set at 35 degrees, it cranks, idles & runs smooth & perfect. The clanking noise does not effect anything, but I know it is not supposed to have it and we spent several hours trying to find where it is coming from & cannot find it. The sound coming out of the header does not sound like a "pop". Anybody have any ideas or suggestions?
P.S. The headers are not stainless steel but they have been JetHot coated & were not kept clean but they now have a silver coat of VHT Header Paint.

Posted By: MR_P_BODY

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 01:47 AM

spray NON flammable carb cleaner along the header
gasket when running to see if the sound changes to
see if it is a gasket issue

Posted By: rickraw

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 02:13 AM

header rubbing? tube leaking at the flange? motor mount?

Posted By: topside

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 02:18 AM

The slip-fit headers on my Hemi car make all kinds of racket until they warm up. Another noise I've found was clutch linkage rattling against headers, on the left side of course. You might also check the collector flange & fasteners, and clearance to torsion bars & whatever.

Posted By: MRMOPAR622

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 06:03 PM

Thanks Mr_P,thats the one thing I have not tried yet.

They are not slip-fit tubes,only the collectors,they do not make any noise till the temp gets up to 170 degrees and above.The bolts were all tight,the gasket show no signs of leakage when I pulled the header off to check for cracks on the inside of flanges,they have plenty of clearance,not rubbing on hitting on anything.

I have never seen or heard anything like this before,that I could not find.I'm headed back out to the shop now and going to start checking and rechecking everything again.Thanks everyone for all the advice & help!

Merry Christmas and a Happy New to everyone!

Posted By: Mopar-Al

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 07:21 PM

Did you listen for the noise through each header tube? Is it possible something fell into the chamber and on top of a piston? 170 degrees it knocks? Rod growth clearances? Loose balancer? You got me curious. In a dragster right? Loose piston pin? Left a snap spiral off? I hope it is a simple issue for you.

Posted By: B G Racing

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 07:26 PM

Not to be an alarmist here,but I would check the bottom end and do it soon,if for no other reason piece of mind.We chased a clanging noise which sounded like trans or converter bolts to find a rod bearing.

Posted By: galen

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 07:35 PM

You can kill the spark on the cylinders one at a time and see if the noise changes, maybe narrow it down. Cut the oil filter open and see whats inside.

Posted By: greendart408

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 07:58 PM

My car does this same thing when I pour in m5 methanol. Mine is loud, I have found that my car only does this noise when I am trying to build heat with the shut off valve. Last time I ran mine I found that a slighty richer shut off adjustment makes mine go away. Something worth trying. Mine doesn't do it at all on reg methanol, only on m5. I am almost positive mine is somehow popping and burning fuel in header. Fwiw I run toilets as well.

Posted By: camastomcat

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 09:33 PM

Make sure you don't have a lose converter bolt

Posted By: Al_Alguire

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 10:15 PM

Wrist pin?!?

Posted By: Sb Valiant

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 10:29 PM

We had a sound like that one time from a specific side as well when the exh valves were set way loose.

Posted By: MRMOPAR622

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/21/12 10:59 PM

I just come back in from the shop,this is one of them deals where you just have to walk away from it for a few moments.The vale lash is perfect on both sides,did not have to relash a one,while I was at it I rechecked the valve springs,push rods they are not rubbing or hitting anywhere,you can spin them when checking the lash and they all appear straight.I have the header off and can not find any cracks,these are a set of headers we brought used no dents or dings the only thing wrong was they were never washed or cleaned so I just repainted them silver,but where one tube slides into the collector it not what you would call loose but you can see around the end of it going inside the collector there is no paint like it could have move a little.
I'm 99.99% sure the noise is coming out the header or after looking at tube going into collector maybe could be from their but I doubt it. It does not have a regular beat like it is a bearing or wrist pin,if a lifter should have seen some clearance in the lash.But by all means thanks for telling me to check those,because that might be what I have to do next.Looks like I might take a couple of hours off and go start checking everything again.Thanks everyone for all the advice!!!

Posted By: B G Racing

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/22/12 01:17 AM

The noise I was referring to only occured at low idle and when the engine was shut off.

Posted By: rickraw

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/22/12 02:03 AM

try putting some high temp silicone in the collector receivers, slip it on the pipes, let it cure for 24 hrs. that way u will elliminate leakage there.

Posted By: Cab_Burge

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/22/12 07:39 AM

Quote:

try putting some high temp silicone in the collector receivers, slip it on the pipes, let it cure for 24 hrs. that way u will elliminate leakage there.

Posted By: BB65Barracuda

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/22/12 12:57 PM

Exhaust Valve?

Leak Down Test Perhaps?

Posted By: Cheatham

Re: Clanking Noise Coming Out Pass. Side Header???? - 12/22/12 10:34 PM

I know the same noise your describing my pass side ex sounds like a slight pop or like as if the plug wires are coss firing, i checked my lash as well all good but i cleaned the plugs with a lil carb cleaner and it cleared up for a while then came back, i probably need new plugs

Posted By: MRMOPAR622

Re: Clanking Noise Coming Out Pass. Side Header???? - 01/03/13 12:30 AM

First time today I have had the time to do any work on the car again...and I guess what they say is True if you don't get it right the 1st time keep trying till you do.Found the problem!!!

I had noticed the spark plug on #6 looked very lean,so I checked the nozzel,line going to the nozzle,filter-not clogged,blowed air through the nozzel holder(don't really know the name)that the pill goes in to make sure the air vent as well as the nozzel holder was clean everything checked out fine.
So today the 1st thing I done is pulled the nozzel holder out to see if I had damaged it...and their it was in the end of nozzel holder(the piece that goes into the intake)a small piece of the foam filter that goes around the out-side of it.The foam filter looks to be deteriorating and it pulled a piece down into nozzel holder. By it being foam it appears it was letting droplets of fuel come through instead of spraying the fuel in and that's why there was no dead cylinder. I know to check the filters to make sure they are clean,but never thought about them deteriorating.Also I never thought there was a need to cover the air bleeds when blowing them out,but from now on will put a small piece of rubber hose over them to make I get enough pressure going through them.
Maybe this info. will help someone in the future.And THANKS everyone for the help!

Posted By: Cab_Burge

Re: Clanking Noise Coming Out Pass. Side Header???? - 01/03/13 02:38 AM

Quote:

First time today I have had the time to do any work on the car again...and I guess what they say is True if you don't get it right the 1st time keep trying till you do.Found the problem!!!

I had noticed the spark plug on #6 looked very lean,so I checked the nozzel,line going to the nozzle,filter-not clogged,blowed air through the nozzel holder(don't really know the name)that the pill goes in to make sure the air vent as well as the nozzel holder was clean everything checked out fine.
So today the 1st thing I done is pulled the nozzel holder out to see if I had damaged it...and their it was in the end of nozzel holder(the piece that goes into the intake)a small piece of the foam filter that goes around the out-side of it.The foam filter looks to be deteriorating and it pulled a piece down into nozzel holder. By it being foam it appears it was letting droplets of fuel come through instead of spraying the fuel in and that's why there was no dead cylinder. I know to check the filters to make sure they are clean,but never thought about them deteriorating.Also I never thought there was a need to cover the air bleeds when blowing them out,but from now on will put a small piece of rubber hose over them to make I get enough pressure going through them.
Maybe this info. will help someone in the future.And THANKS everyone for the help!

Good find, hopefully before any damages occurred

Lots of Gremlins out there

Murphy loves messing with drag racers, huh

Posted By: bobby66

Re: Clanking Noise Coming Out Pass. Side Header???? - 01/03/13 03:10 AM

You sure that headers not tapping the torsion bar?

Posted By: Sport440

Re: Clanking Noise Coming Out Pass. Side Header???? - 01/03/13 03:51 AM

Quote:

First time today I have had the time to do any work on the car again...and I guess what they say is True if you don't get it right the 1st time keep trying till you do.Found the problem!!!

I had noticed the spark plug on #6 looked very lean,so I checked the nozzel,line going to the nozzle,filter-not clogged,blowed air through the nozzel holder(don't really know the name)that the pill goes in to make sure the air vent as well as the nozzel holder was clean everything checked out fine.
So today the 1st thing I done is pulled the nozzel holder out to see if I had damaged it...and their it was in the end of nozzel holder(the piece that goes into the intake)a small piece of the foam filter that goes around the out-side of it.The foam filter looks to be deteriorating and it pulled a piece down into nozzel holder. By it being foam it appears it was letting droplets of fuel come through instead of spraying the fuel in and that's why there was no dead cylinder. I know to check the filters to make sure they are clean,but never thought about them deteriorating.Also I never thought there was a need to cover the air bleeds when blowing them out,but from now on will put a small piece of rubber hose over them to make I get enough pressure going through them.
Maybe this info. will help someone in the future.And THANKS everyone for the help!

Im just not sure if the above would equate to a clanking noise. Unless your suggesting the miss is causing another source of clanking noise.

I thought most other possible sources were dismissed already.

Posted By: poppaj

Re: Clanking Noise Coming Out Pass. Side Header???? - 01/03/13 05:10 AM

Hope it din't burn a valve or a piston.

Posted By: MRMOPAR622

Re: Clanking Noise Coming Out Pass. Side Header???? - 01/03/13 01:25 PM

It was a new engine build & just started it on warm up,so hopefully it did not hurt anything sounds fine now.

PS I would have never thought something like that would have make a clanking sound either.