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View Full Version : Replacing Cat Gasket

240SX21
10-22-2002, 09:13 PM
hey guys.  ok, i feel that i have an exhaust leak & im pretty sure its coming from the rear end of my cat.  so i got a new gasket & am going to replace the old one(which i hope will correct the problem).  now what i wanna know is, is it as easy as i think it is?  unscrew bolts, remove old gasket, put in new one, & re-tighten bolts?  or am i missing something?  also, do i still have to use gasket sealer even though im putting in a brand-new gasket?  any help is appreciated,thanks!
SSJ2Gohan
10-23-2002, 06:04 AM
That's pretty much all there is too it.  Just soak those bolts in some wd-40.  Id say if you can replace the bolts if they are rusted real bad.  Since they are so cheap I always replace the stock bolts whenever I do something new.

I dont think you need gasket sealer.  Probably wouldnt hurt anything to do it though.
simdude
10-23-2002, 04:02 PM
What size are the bolts on the exhaust from the cat.. im just wonderin cause both of my gaskets are broken <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cry.gif" border="0" valign="absmiddle" alt=':cry:'> , not that its expensive, its just a pain.... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/unhappy.gif" border="0" valign="absmiddle" alt=':unhappy:'>
wherezmytofu
10-23-2002, 05:25 PM
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (simdude @ Oct. 22 2002,6:02)</td></tr><tr><td id="QUOTE">What size are the bolts on the exhaust from the cat.. im just wonderin cause both of my gaskets are broken <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cry.gif" border="0" valign="absmiddle" alt=':cry:'> , not that its expensive, its just a pain.... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/unhappy.gif" border="0" valign="absmiddle" alt=':unhappy:'></td></tr></table><span id='postcolor'>
air tools &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>
240SX21
10-23-2002, 07:35 PM
yea thats definetly what i need. &nbsp;im still using ye olde torque wrench. &nbsp;and simdude im not sure what size the bolts are, but im probably gonna be takin em off to replace the gasket this weekend. &nbsp;yea the gasket was cheaper than i thought- $2.
camppain
10-25-2002, 07:45 AM
when you do replace the gaskets throw some anti sieze on the threads of the bolts and on the threads of the nut, just incase you ever have to unbolt anything in the future &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>