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Re: How do I fix a leaky EGR valve (engine dying on idle)?
Posted by MS (more from MS) on Sun, 7 Jul 2002 14:05:26
In Reply to: How do I fix a leaky EGR valve (engine dying on idle)?, Jimmy Schmincke, Sun, 7 Jul 2002 13:10:25
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With an EGR valve and vacuum hoses connected, the first thing to suspect are the vacuum hoses themselves. Those hoses can either get brittle and crack around fittings, or expand and become useless. Either way it's a leak. If in doubt, replace them all. It's an easy DIY job. The valve itself is pretty foolproof, although they are prone to leaking with age as well, mostly when the internal suction diaphram ruptures. It's easy to tell if the diaphram is shot - you suck on the vac hose that connects to the valve. You should get resistance. If you only get air, that's a shot diaphram and you'll have to replace the valve. Of course with a two port EGR valve like the one you've suggested you have, you'll have to close off one of those ports when you do the suction test. The only other thing connected to the valve is the 5/8 diameter pipe that runs from the valve on one end and through the intake manifold on the other (where it connects to an exhaust port through the cylinder head). Other than the diaphram rupturing, the valve itself can get clogged with accumulated carbon and cease to operate. Whenever I do EGR valve maintenance, I clean it's insides with a solvent, a small scraping tool and lubricant. To have someone do all that, replacing parts and so forth - yeah, someone can charge you a goodly fee because they can. Try negotiating.
posted by 64.12.10...
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