How difficult is it to negotiate an EGR valve? Is self explanatory as you go about disconnecting it and everything?
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Clean your EGR Valve, just DO IT!
- Thread starter BlazerLT
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egr valves are a PITA to clean. i had to do the one on my camry to pass texas smog and i put it in a plastic bag with seafoam and let it sit for 3 days. got an amazing amount of stuff out with a gun brush. car did not run any better but i passed smog.
You also have to clean the intake side of the egr valve, if you didn't that's why. I cleaned the one on the aspire and it had clogged up to maybe 1/4 out of a inch. Runs alot better, smoother and I don't have the idle problem anymore.
I thought you weren't suppose to soak EGR valves due to the solenoid and some other electrical device in there..
I also heard they have some diaphram<-- SP?? That may not hold up against things like carb cleaner and such?
I also heard they have some diaphram<-- SP?? That may not hold up against things like carb cleaner and such?
Older Civics had a bellows-actuated, vacuum-driven EGR valve that was incredibly reliable and not at all prone failing.
Unfortuntately, the passageway downstream from the valve that fed exhaust into the intake manifold was seriously undersized, and would clog horribly over time. Here in California, many an early 80's Civic owner had to buy the "special" wrench from Honda to remove the manifold and route out the passage -- typically by drilling hole in the pointed end of the manifold nearest the firewall, and using a stiff piece of wire to clear it. Otherwise, no tickee, no playee while passing smog, with NO readings sky-high.
Of course, once the hole was drilled, it had to be filled. Smarter owners drilled and tapped it, less intelligent ones welded it shut, gambling the problem wouldn't happen again -- but it did, of course, much to the delight of the 5-gas analyser crews out here.
BTDT....twice.
I am *so* glad my new car has no EGR!
Unfortuntately, the passageway downstream from the valve that fed exhaust into the intake manifold was seriously undersized, and would clog horribly over time. Here in California, many an early 80's Civic owner had to buy the "special" wrench from Honda to remove the manifold and route out the passage -- typically by drilling hole in the pointed end of the manifold nearest the firewall, and using a stiff piece of wire to clear it. Otherwise, no tickee, no playee while passing smog, with NO readings sky-high.
Of course, once the hole was drilled, it had to be filled. Smarter owners drilled and tapped it, less intelligent ones welded it shut, gambling the problem wouldn't happen again -- but it did, of course, much to the delight of the 5-gas analyser crews out here.
BTDT....twice.
I am *so* glad my new car has no EGR!
I started cleaning the EGR last night. It was a little carboned up but was not plugged. The EGR and especially the passageway to the intake were full of a thick liquid that looks like tar.
Is it normal to have this goo in a high mileage motor? Is it a mixture of soot and fuel?
Is it normal to have this goo in a high mileage motor? Is it a mixture of soot and fuel?
I tried googling as far as how to.. and found a few websites says to clean the pipe.. but with the EGR out.. start the car for a few seconds to blow the crud out ??? Other then it throwing a CES.. is this advisable? Should I rev the engine a lil to get more pressure to blow the crud out of the pipe??
Guys,
Don't spend a lot of money on carb cleaner. They all have the same basic ingredients, MEK and acetone. Buy the least expensive brand they have, like Value Craft. Also, lacquer thinner is very effective at removing carbon. Use those small acid brushes and some lacquer thinner in those tight places.
[ January 21, 2006, 06:33 AM: Message edited by: GoldenRod ]
Don't spend a lot of money on carb cleaner. They all have the same basic ingredients, MEK and acetone. Buy the least expensive brand they have, like Value Craft. Also, lacquer thinner is very effective at removing carbon. Use those small acid brushes and some lacquer thinner in those tight places.
[ January 21, 2006, 06:33 AM: Message edited by: GoldenRod ]
BlazerLT,
Don't know about other engines, but read a tech buletin couple months ago that someone, don't remember if it's Tomkins or Dorman is now making a egr gasket for 4.3 that has wire screen built into it to keep carbon "chunks" from sticking valve open.
Bob
Don't know about other engines, but read a tech buletin couple months ago that someone, don't remember if it's Tomkins or Dorman is now making a egr gasket for 4.3 that has wire screen built into it to keep carbon "chunks" from sticking valve open.
Bob
Yes, you are right, there is one and I think the name starts with a T. It isn't Tomkins but it is something along those lines.
Either way I don't suggest using it. You want the carbon out of the engine, you don't want to trap it in there.
Either way I don't suggest using it. You want the carbon out of the engine, you don't want to trap it in there.
What kind of gasket does the EGR tube usually use?
Yeah, my EGR is bolted away from the intake, which uses a cardboard gasket and was a pain to get off, and then its got a pipe that goes from just behind the EGR to the back of the intake. This pipe/tube has 2 bolts on each end.
Id like to clean this out...but dont want the headache of removing another(two) of those carboard gaskets!
Id like to clean this out...but dont want the headache of removing another(two) of those carboard gaskets!
It is not a big deal to clean.
Having an egr valve that is clogged will cause pinging and detonation which may not be detected by the human ear but which will definitely affect the computers engine timing when it retards the timing to compensate which will result in less power and poorer fuel economy.
Having an egr valve that is clogged will cause pinging and detonation which may not be detected by the human ear but which will definitely affect the computers engine timing when it retards the timing to compensate which will result in less power and poorer fuel economy.
Yeah, and Ive been hearing pinging!
Then it could very well be plugged or the vlave might need cleaning as well along with the tubes.
Always remember to scrub the tubes as well. A piece of carbon could be lodged somewhere along it and you wouldn't even know.
Always remember to scrub the tubes as well. A piece of carbon could be lodged somewhere along it and you wouldn't even know.
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