mule13 Posted October 2, 2010 Share Posted October 2, 2010 can someone tell me what purpose the cross tube connected to intake and exhaust manifold serves on the renix engine? i put a reman engine in my manche last month and drove it up here to carolina, rode around a week or so and noticed a exhaust leak. found the crossover tube was out of the intake manifold,when i got down there and looked the threaded part of the intake manifold was broke off,i held it in place with a bungee cord and jb welded it that lasted a week,this morning i went to walmart and it was exhaust leak worse than ever.the jb weld broke off or came lose something.i took the whole thing off and cut it in half folded the exhaust side over and put it back in, on the intake side i found a penny fit into the hole and lodged about 1/4 inch up in there on a lip so i covered the penny with red high temp rtv and shoved it in there,after it dried i filled in the rest of the hole with more rtv. hopefully that will hold any vacuum leaks from occuring. but what effect will the tube not being hooked up have? Link to comment Share on other sites More sharing options...
64 Cheyenne Posted October 2, 2010 Share Posted October 2, 2010 Got any pics? I'm thinking what you are talking about is the EGR tube. Will it affect anything, yes and no. Yes, it will take longer to warm up. No, it will not hurt anything if it isn't leaking exhaust or vacuum. Link to comment Share on other sites More sharing options...
jimoshel Posted October 2, 2010 Share Posted October 2, 2010 Only thing I can think of of is EGR. Feeding a small amount of exhaust back into the engine. Meant to reduce emissions. Shouldn't hurt engine performance without it. Only worry would be emissions inspection. Link to comment Share on other sites More sharing options...
mule13 Posted October 2, 2010 Author Share Posted October 2, 2010 yea I'm sure its part of the egr system,and we don't have vehicle inspections in Florida where the vehicle is registered. its the 1/2 metal tube the screws into the intake manifold below the air horn and the exhaust on the side right above whatever sensor that is.exhaust air temperature sensor i would imagine. and thanks for your replies guys. Link to comment Share on other sites More sharing options...
Geonovast Posted October 3, 2010 Share Posted October 3, 2010 Yes, EGR. You can easily bypass it by plugging the holes on the manifolds, and disabling the EGR valve. They got rid of the EGR in 91 with the HO system anyway. Link to comment Share on other sites More sharing options...
fiatslug87 Posted October 3, 2010 Share Posted October 3, 2010 ...above whatever sensor that is.exhaust air temperature sensor i would imagine. That would be the Oxygen Sensor. Link to comment Share on other sites More sharing options...
mule13 Posted October 3, 2010 Author Share Posted October 3, 2010 ok i drove the manche this morning and runs fine without the tube there and the holes plugged.i didnt disconnect the egr valve before i drove it. after i got back i left it running and checked the egr valve it isnt working anyway,feels like it has a little vacuum on it, but the little lever that the vacuum should opertae doesnt move so I'm just gonna leave it like it is unless someone thinks it will create a problem ? Link to comment Share on other sites More sharing options...
64 Cheyenne Posted October 3, 2010 Share Posted October 3, 2010 I would recommend plugging the vacuum line at the source for the EGR. Otherwise, :thumbsup: Link to comment Share on other sites More sharing options...
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