I just installed my DC 4-1 header the other night. After the install there was a hissing noise coming from the engine bay. Could this be a result of increased airflow? TIA

 

Exhaust leak. Did you torque the bolts to the specs?

 

I had to use just a wratchet for the install. Shoud it go away if torque them to specs?

 

Make sure you bolted the header on flush with the head. You might have it wedged with the block (yeah, I did it when I did it the first time). Also make sure your gasket is good.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tbud454 &raquo;</TD></TR><TR><TD CLASS="quote">I had to use just a wratchet for the install. Shoud it go away if torque them to specs?</TD></TR></TABLE>

I tightened mine down with a ratchet and they should be fine but double check them and also check your bolts where it bolts up to the cat or etst pipe.

 

bump. anyone else?

 

has to be an exhaust leak .. was there a gasket that came with the new header that should have been installed?? maybe you should get one ??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18bEK &raquo;</TD></TR><TR><TD CLASS="quote">has to be an exhaust leak .. was there a gasket that came with the new header that should have been installed?? maybe you should get one ??</TD></TR></TABLE>

i used the stock gasket, and it was in perfect shape.

 

loose bolts

 

its def an exhaust leak.. it could be loose bolts .. i would invest in a torque wrench ... i'm not trying to be a dick ut there is a reason for torqueing stuff.. so def torque them down to spec.. def dont want them to be over or under tightened.. i would also replace the gasket even if the old one looked fine.. its only a few bucks

 

I installed my header the other day, I did the same I didnt tighten up the 2nd bolt on the header to the cat made it sound really raspy. I tightend it up last night sounds alot better. check all your boltz...

 

dc sport headers all make a slight hissing noise do to the thinner metal they use, it is normal

 

Just double check to make sure the bolts on the head is tight, and the bolts that go to your cat are tight, if that doesnt stop it, then try taking it to a muffler shop and maybe the header mihgt be cracked? Did you buy it used or new? Also maybe what cheeseface123 is saying might be true. Ive never heard of that before but maybe. I dont really remember my friends making a hissing noise but ya never know...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cheeseface123 &raquo;</TD></TR><TR><TD CLASS="quote">dc sport headers all make a slight hissing noise do to the thinner metal they use, it is normal</TD></TR></TABLE>

um that doesn't sound right, why would the thickness of the metal have ne thing to do with it? as long as there are no holes in it and it sits flush against the head w/ a proper gasket there should be no hissing hence indicating a leak. if this was true for all dc sport headers do you really think theyd do the business they do now? i would send my **** back lickity split!