304 exhaust question - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > 304 exhaust question

ExtremeTerrain GROUP BUY: Barricade Rear Bumpers/Tire Carr*VOTE NOW Help Metalcloak Giveaway an XJ Suspension*Component speaker deal for your dash - NalinMFG

Reply
Unread 07-04-2003, 11:47 AM   #1
possum398
Registered User
 
Join Date: May 2003
Location: Mississippi
Posts: 22
304 exhaust question

I have just replaced my 304 in my CJ-7. I have a problem. I can not keep exhaust from leaking at the header gaskets. All of my bolts are tight. I have tried one gasket, and I have tried to double them up. I still have a bad leak. I am using the gaskets that came in my felpro gasket kit for the engine. Do I need to invest in better gaskets?

possum398 is offline   Reply With Quote
Unread 07-05-2003, 05:58 PM   #2
Sandman74
Registered User
 
Join Date: Feb 2003
Location: Broomfield, Co
Posts: 109
It may sound silly, but what shape are your motor mounts in? Are they sagging in any way? If so this will keep the headers from sitting exactly square and thus you will constantly burn gaskets. I had this problem also and the new mounts are what fixed it.
__________________
Youth and talent is no replacement for age and treachery.
Sandman74 is offline   Reply With Quote
Unread 07-06-2003, 06:05 PM   #3
possum398
Registered User
 
Join Date: May 2003
Location: Mississippi
Posts: 22
Both of my motor mounts are brand new. I changed them when I put my new engine in.
possum398 is offline   Reply With Quote
Unread 07-06-2003, 06:43 PM   #4
fuzz401
Registered User
1978 CJ7 
 
Join Date: Jan 2003
Location: Lancaster, Pa.
Posts: 1,756
try putting rtv ultra copper on both sides of the gaskets
__________________
1978 cj-7 had since 1979
401 .030 over- full floating flat top pistons
crower solid cam 292 dur .500/.510 lift
turbo 400 tranny 2500 stall
model 20 transfer case
aj delux glass body
4" lift
dana 30 frount
dana 44 rear
4.56 gears
http://img2.photobucket.com/albums/v...slideshow=true
http://photobucket.com/albums/v31/fu...slideshow=true
13.461 @ 92.45 mph on 37" super swampers on 1/4 mile
fuzz401 is offline   Reply With Quote
Unread 07-07-2003, 06:56 PM   #5
rock-rod
Registered User
 
Join Date: Jun 2003
Posts: 13
You might also try the Mr. Gasket "Ultra-Seal" brand of header gaskets. they are made from some kind of graphite and hold up very well. Also pull the headers and check the flange surface with a strait-edge. they may be warped a little.
__________________
'85 CJ-7, fuelie '73 401, NV 4500, Atlas III 4.3, 14 bolt FF rear, Dana 60 front, full width axles, Detroits F&R, 4 wheel discs, spring over front, coils and reverse 4link rear, 100 in wheelbase, 42 inch Swampers on hummer beadlocks.
rock-rod is offline   Reply With Quote
Unread 07-07-2003, 07:08 PM   #6
OldJeepguy
Registered User
1979 CJ7 
 
Join Date: Dec 2001
Location: Santee, CA.
Posts: 753
I had the same problem when I had my 304. Upon the suggestion of a racing friend I did a "redneck" surface grind on my manifolds - basically ground them flat by putting them face down on my garage floor and moving them in a figure 8 pattern until they were flat. I then assembled the exhaust with no gaskets and had no further issues with them - I was skeptical but I'm a believer now.
__________________
Steve
jeep79cj@yahoo.com
OldJeepguy is offline   Reply With Quote
Unread 07-07-2003, 07:20 PM   #7
Scrambler82
Registered User
1982 CJ8 
 
Join Date: Jun 2002
Location: Boston Area
Posts: 3,594


I saw a coupling once, in a magazine, that was flexible and replaced about 6 inches of pipe.

I am sorry that I don't remember where I saw it but there is something out there that will assist you in your quest for a leak free header flange.

LOL,
__________________
Scrambler82

Do it right the first time !
Scrambler82 is offline   Reply With Quote
Unread 07-08-2003, 12:06 PM   #8
possum398
Registered User
 
Join Date: May 2003
Location: Mississippi
Posts: 22
Thanks for the advice. I am going to try a copper gasket to see if it helps.
possum398 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.