Exhaust rattle!

I used large hose clamps, and tightened on the ends, crimped things nice and tight, then removed the clamps.

 

I removed, then powdercoated the headers. A word of caution: stuffed with a fluffy material that has been debated as asbestos or fiberglass, but dangerous to inhale if it's all crumbled in there, at any rate. I kept a hose dribbling outside, and continuously squirted water into the shielded area during cutting to keep the filling wet. Aluminum snips can work on the thin shield, though careful use of a grinder wheel is far faster. Recommend preserving the large, heavier collector shield at the end for added heat protection.
Image Unavailable, Please Login
Image Unavailable, Please Login

 

I'm having the same issue. Hoping to find a way to fix it without removing the exhaust...

 

Would seriously reconsider discarding the heat shields guys, they're placed there for a reason.. seems to be enough issues with fuel related fires, no need to add another potential issue to the mix. 2cts

 

http://www.ferrarichat.com/forum/145013765-post4.html

 

They are here because of the catalysators (or is it catalycists?): Euro cars, which do not have "cats" (that's simpler...) do not have them.
Except the swiss 328s after 1987, with the "C" engine (= "cats")

Rgds

 

Understood! but I think it maybe useful to state from time to time that these "wraps" or shields do indeed have a purpose...

Rgds

 

AND YOU STILL HAVE RATTLES??!!!???

(My condolences.)

 

Maybe the rattle is In mthe muffler? Baffle rusted through? Happened to my ANSA

 

If your headers are setting off engine fires, then you have a problem with a leaking gas tank, filler neck or fuel line, and not with your headers. Heat shields will only mask that problem for so long.

That said, I carefully cut off the heavier metal shield around the single outlet end (two cuts laterally along the sides, like a clamshell), separately had them powdercoated along with the headers, and then had the top-facing half welded back on for extra radiant protection. I'll grab a pic when I get home.

Protection is good, but the temp differential between the heat shielded area and the engine bay can cause moisture to bead up, and corrode the headers. On PPI, there was evidence my car had suffered a past exhaust fire (turned out to have been a failed ignition coil). My shields were rattling around, and I had an exhaust leak somewhere, so I opted to remove the shields to inspect the pipes. Had they looked bad, would have gotten aftermarket headers, but they turned out to be almost perfect underneath. Still haven't run my car yet since motor rebuild, but will let you know.

To 308 Milano's point, cats cause the most massive heat build-up. If you're running test pipes or no cats, you're prob running cooler, so depends on your setup.

 

Upon inspecting my exhaust system, which wound up getting completely redone, found some other possible points of rattles or exhaust leaks. Previous owner(s) had removed the smog system, and jammed in SAE size plugs in the header ports and engine block ports. Not a perfect fit. Verell at Unobtanium sells perfect engine plugs (Ricambi stocks them, too), and absostone sourced the header plugs for me at GT Car parts. Also, the "doughnut" gasket rings between exhaust sections wear out and crumble over time, and need to be replaced. Check your exhaust connection bolts for tightness. Lastly, the muffler and exhaust vibrate and need to be allowed to do so; check that the buffer springs and mounting forks aren't rusted solid and have wiggle.

 

With these heat shields, does the rattle only happen when you get to a certain point in the RPM's?

 

Jim, totally off on a tangent but trying to guess ahead. If you have a metallic type rattle from the engine bay only at certain rpms (and maybe when cold) then it MIGHTd be the a/c hoses rattling against something - try isolating those hoses - I used a bit of old rad hose, cut it, wrapped the a/c hoses around where they pass the chassis tube and that helped.

 

That's a damn good idea. Best thing about fchat, thanks man!

Of course I won't be trying that out for at least another month...but I did consider taking a spin in this snow today (not recommended but the car would start!)

 

Since Chaya is in Texas. Maybe this one?

http://kids.nationalgeographic.com/content/dam/kids/photos/animals/Reptiles/Q-Z/rattlesnake-tongue.jpg.adapt.945.1.jpg

Best from Germany
Martin

 

If you are in need of a low mileage, good condition, non rattling rear US exhaust manifold for a 308/328, I have one I am willing to sell. PM me if interested.
Image Unavailable, Please Login

 

Crazy as it may sound, if it's your goal to preserve originality and keep the heat shield, you could try finding a gap or crack where it's loose and stuffing in more hi-temp fiberglass batting. Stuff it full enough and maybe it won't rattle. Just a thought.

 

that was flippn scary!! I hate those evil vile beasts!!

 

Remove all of it then ceramic coat your headers. All the heat goes out the exhaust.