pug Posted December 19, 2009 Share Posted December 19, 2009 I have a 1990 2.5 tbi. I have a exauste leak from manifold area it only ticks when higher rpms so i am thinking it is gasket. My question is if it was a cracked manifold wouldnt it tick at all rpms. Link to comment Share on other sites More sharing options...
Geonovast Posted December 19, 2009 Share Posted December 19, 2009 Do you have all your exhaust bolts? The front stud on the 2.5/4.0 is notorious for working its way out and disappearing. Link to comment Share on other sites More sharing options...
pug Posted December 19, 2009 Author Share Posted December 19, 2009 Yes just tighten all bolts on manifold. Also just got a new converter and muffler so i know that is good. Link to comment Share on other sites More sharing options...
socal1200r Posted December 19, 2009 Share Posted December 19, 2009 Do you have all your exhaust bolts? The front stud on the 2.5/4.0 is notorious for working its way out and disappearing. Yup, I'm missing the very front bolt for the exhaust manifold...it's a little loud, but doesn't seem to be leaking any exhaust fumes. I'm saying that for two reasons, one I'm not smelling any obvious exhaust fumes from under the hood, and two it passed VA inspection. I'd like to think that if it was leaking, or a serious repair, the inspector would've failed the truck... Link to comment Share on other sites More sharing options...
dasbulliwagen Posted December 20, 2009 Share Posted December 20, 2009 Chrysler has a technical service bulletin on those for the front and the rear bolts, they don't fall out, they break off. My truck is the same way, but doesnt seem to leak. They have a revised stud, washers and spacer and torque rating for them. Link to comment Share on other sites More sharing options...
pug Posted December 22, 2009 Author Share Posted December 22, 2009 How do you tell if the manifold gasket is bad once it is of the vehichle. Link to comment Share on other sites More sharing options...
mnkyboy Posted December 22, 2009 Share Posted December 22, 2009 How do you tell if the manifold gasket is bad once it is of the vehichle. usually there will be a burned section where its been leaking Link to comment Share on other sites More sharing options...
pug Posted December 22, 2009 Author Share Posted December 22, 2009 Ok thanks i will look for that. Link to comment Share on other sites More sharing options...
pug Posted December 23, 2009 Author Share Posted December 23, 2009 Changed manifold gasket today and yes it was burned out on the bottom. I drove around all day no ticking parked it for about an hour started ticking again. Tighten everything down again drove around the block no ticking. I let it cool off went to get something to eat started ticking again. Haynes manual says to tourqe 22lbs. Is this correct or am i doing something wrong. Thanks Link to comment Share on other sites More sharing options...
Automan2164 Posted December 23, 2009 Share Posted December 23, 2009 Sure the manifold isn't cracked or warped? Rob L. Link to comment Share on other sites More sharing options...
pug Posted December 23, 2009 Author Share Posted December 23, 2009 I took manifold off and replaced with new one also. Link to comment Share on other sites More sharing options...
carnuck Posted December 23, 2009 Share Posted December 23, 2009 I use exhaust cement the second time or if I think the manifold might be warped. Ain't no third time fixing one yet in 30+ years! Link to comment Share on other sites More sharing options...
pug Posted December 24, 2009 Author Share Posted December 24, 2009 Manifold is good. The bolts keep backing out. I tourqued down for the 4th time. Any ideas PLEASE. thanks Link to comment Share on other sites More sharing options...
carnuck Posted December 24, 2009 Share Posted December 24, 2009 Locktite or rethread the hole and put a larger one in Link to comment Share on other sites More sharing options...
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