87Chief Posted November 13, 2010 Share Posted November 13, 2010 Hello, when I drove to work, about 20 mins, I start seeing a lot of smoke coming from under the hood and I smeel which seems like exhaust maybe oil or something. I don't know but I do have a cracked valve cover... I might be replacing that soon, if I can find an aluminum one. Can anyone help? I will have pics soon.. Link to comment Share on other sites More sharing options...
jimoshel Posted November 13, 2010 Share Posted November 13, 2010 Can you see if fresh oil is leaking out from under the valve cover and running down to the exhaust manifold and/or exhaust pipe? Link to comment Share on other sites More sharing options...
james750 Posted November 13, 2010 Share Posted November 13, 2010 What color is the smoke? Blue=oil white=coolant black=unburned fuel Link to comment Share on other sites More sharing options...
87Chief Posted November 13, 2010 Author Share Posted November 13, 2010 There is oil sitting next to the valve cover and exhaust manifold when I turn off the engine and pop the hood. There are cracks in the valve cover... But I just don't see that this much is coming out. Link to comment Share on other sites More sharing options...
james750 Posted November 13, 2010 Share Posted November 13, 2010 Keep in mind, a little oil on the exhaust makes a lot of smoke. Also your oil pressure is much higher at cruising/driving RPM's vs. idling, and much more oil will come out of cracks in the cover. Link to comment Share on other sites More sharing options...
87Chief Posted November 13, 2010 Author Share Posted November 13, 2010 Yeah at about 45-50 my oil pressure is about 70... And I check the oil level every once in awhile and it says Full.. And there is quite a few oil spots on the driveway Link to comment Share on other sites More sharing options...
james750 Posted November 13, 2010 Share Posted November 13, 2010 That oil pressure reading is a tad high, I wouldn't want my oil pressure too much beyond 60 psi at any RPM. That may be something to look into as well. Link to comment Share on other sites More sharing options...
juan Posted November 13, 2010 Share Posted November 13, 2010 my 88 mj blow by was so bad that it was filling the engine bay (with the hood closed) with exaust and oil smell - I had a catch can collecting the blow by. This exhaust smoke had to go somewhere so it found its way thru my shifter into the cab and made driving with the windows open very difficult. My solution, I ended up swapping another engine. Link to comment Share on other sites More sharing options...
87Chief Posted November 14, 2010 Author Share Posted November 14, 2010 Yeah I figured I would have to do an engine swap sooner or later but it only has 131k... Lol I'll probably put another 2.5L just because, no dealing with wires and it's just a DD to school and stuff. About the oil pressure. What could cause that? Link to comment Share on other sites More sharing options...
jimoshel Posted November 14, 2010 Share Posted November 14, 2010 Faulty gauge or sending unit. Get a mechanical unit and check. Sticking relief valve in oil pump. Link to comment Share on other sites More sharing options...
87Chief Posted November 15, 2010 Author Share Posted November 15, 2010 Thanks. Would this fit on my 2.5L? for a valve cover? http://cgi.ebay.com/ebaymotors/Jeep-Wra ... _500wt_956 Link to comment Share on other sites More sharing options...
87Chief Posted November 16, 2010 Author Share Posted November 16, 2010 Well? And also, if I get the PVC valve and hoses and stuff from a '91+ cherokee would they work with the wrangler valve cover?? Thanks Link to comment Share on other sites More sharing options...
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