pug Posted December 19, 2009 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.
Geonovast Posted December 19, 2009 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.
pug Posted December 19, 2009 Author 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.
socal1200r Posted December 19, 2009 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...
dasbulliwagen Posted December 20, 2009 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.
pug Posted December 22, 2009 Author Posted December 22, 2009 How do you tell if the manifold gasket is bad once it is of the vehichle.
mnkyboy Posted December 22, 2009 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
pug Posted December 23, 2009 Author 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
Automan2164 Posted December 23, 2009 Posted December 23, 2009 Sure the manifold isn't cracked or warped? Rob L.
pug Posted December 23, 2009 Author Posted December 23, 2009 I took manifold off and replaced with new one also.
carnuck Posted December 23, 2009 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!
pug Posted December 24, 2009 Author Posted December 24, 2009 Manifold is good. The bolts keep backing out. I tourqued down for the 4th time. Any ideas PLEASE. thanks
carnuck Posted December 24, 2009 Posted December 24, 2009 Locktite or rethread the hole and put a larger one in
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