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Post by dpmc1982 on May 20, 2009 11:27:09 GMT -6
hey...newbie here,mech said crossover tube leaking where is it and what diffilculty involved??
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Post by cbburtraw on May 20, 2009 16:06:41 GMT -6
crossover tube... for the cooling system?
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Post by dpmc1982 on May 20, 2009 16:36:21 GMT -6
ok 98 aurora 129500 miles...car doesnt overheat...temp sometimes up around 220* in summer, goes down at speed, losing coolant out of resevoir need to fill up every week ,maybe 2. switched out to prestone all make and model coolant after ruining my 96 blazer engine.. water pump replaced 10000 miles ago. NO LEAKS THERE. didnt use sealing pellets ........factory mech said my coolant loss was at crossover tube. didnt know that there was another crossover pipe or tube ...let me know what you know....... am i talking about another part ,or is he correct? thanks
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Post by glennda5id on May 21, 2009 9:26:23 GMT -6
The crossover tube is a tube that connects the front and rear heads. It allows coolant to flow between them. It is located on the drivers side of the engine under the throttle body.
I would try the GM seal tabs before attempting to replace the gaskets on the crossover tube.
Some people on the board will swear that you don't need the coolant tabs, but I see more and more people who development mysterious, unseen leaks after replacing their coolant and not using the seal tabs. I have seen it myself. Car was leak free. Radiator starts leaking. Replace the radiator, put in new coolant. No drips....all is well, 500 miles later, low coolant light is on. Add some, 500 miles later, low coolant. I did not have this issue before I replaced the radiator?!? Hoses are not leaking???....hmmm....I add the seal tabs...no more lost coolant.....
Put 5 in the upper radiator hose.
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Post by cbburtraw on May 21, 2009 20:28:22 GMT -6
I would attempt to fix the leak first, if feasable. Then add the seal tabs so that no more leaks occur.
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Post by 55624096 on May 21, 2009 21:31:47 GMT -6
The "corossover tube is ,I think, the water pump housing which crosses over to connect the water between heads. This alumium manifold has two gaskets one at each head. These gaskets get old and begin to weep then really leak. Only good fix is to remove the pump housing put in both new gaskets. This is really a tough job since all the important bolts are very hard to reach. it is very difficlult and requires a box full of tools in order to get the right combo. Good Luck
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Post by dpmc1982 on May 22, 2009 5:20:31 GMT -6
i really appreicate everybodys time and knowledge on my fix. thanks all!!...
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