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Oil around spark plugs 1991 2.2 EFI engine
1991 Accord EX wagon, 192k miles. I had some trouble getting through
the emissions inspection this year excess NOx. I've checked the EGR valve by the manual, vacuum on the port, and it doesn't stall the engine just slowed it down a little so I'm figuring I need to cleanup or replace the EGR. I figured I might as well also tune the engine since I've acummulated 15k miles since the car was given to us. I pulled a spark plug wire and found it loaded with oil. I have no experience with this car but I'm guessing that is abnormal. The achives talk about this, but it's not clear to me exactly how to tackle this problem. Looks like I need to take off the valve cover and work my way down. The manual shows a plate that has grommets that I assume seal the plug stems, but I've seen some advice about taking off the rocker arm. Can I get away with new grommets and a new valve cover gasket? I also figure I'll check the valve clearance while I'm in there. Bob |
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Oil around spark plugs 1991 2.2 EFI engine
For a Honda this age, the chances are good that the seals
(O-rings, to be exact) lower down, beneath the rocker tower like you noted, have failed. If you're handy with cars, their replacement is a do-it-yourself job. See http://home.earthlink.net/~honda.lioness/id3.html for more discussion. Comes up here from time to time. "lswpubrw" > wrote > 1991 Accord EX wagon, 192k miles. I had some trouble > getting through > the emissions inspection this year excess NOx. I've > checked the EGR > valve by the manual, vacuum on the port, and it doesn't > stall the > engine just slowed it down a little so I'm figuring I need > to cleanup > or replace the EGR. I figured I might as well also tune > the engine > since I've acummulated 15k miles since the car was given > to us. I > pulled a spark plug wire and found it loaded with oil. I > have no > experience with this car but I'm guessing that is > abnormal. The > achives talk about this, but it's not clear to me exactly > how to tackle > this problem. Looks like I need to take off the valve > cover and work > my way down. The manual shows a plate that has grommets > that I assume > seal the plug stems, but I've seen some advice about > taking off the > rocker arm. Can I get away with new grommets and a new > valve cover > gasket? I also figure I'll check the valve clearance > while I'm in > there. > Bob > |
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Oil around spark plugs 1991 2.2 EFI engine
Elle wrote:
> For a Honda this age, the chances are good that the seals > (O-rings, to be exact) lower down, beneath the rocker tower > like you noted, have failed. elle, those things almost never go. the ones that go all the time are the "b" gaskets at the top because they get disturbed each time the rocker cover comes off. the undisturbed o-rings at the bottom of the rocker assembly need to be subject to serious erosion before failure, and frankly every /other/ single seal or gasket in the entire motor will go before they do. i know /you/ replaced them, but it doesn't mean your diagnosis was correct. > If you're handy with cars, > their replacement is a do-it-yourself job. See > http://home.earthlink.net/~honda.lioness/id3.html for more > discussion. > > Comes up here from time to time. > > "lswpubrw" > wrote > >>1991 Accord EX wagon, 192k miles. I had some trouble >>getting through >>the emissions inspection this year excess NOx. I've >>checked the EGR >>valve by the manual, vacuum on the port, and it doesn't >>stall the >>engine just slowed it down a little so I'm figuring I need >>to cleanup >>or replace the EGR. I figured I might as well also tune >>the engine >>since I've acummulated 15k miles since the car was given >>to us. I >>pulled a spark plug wire and found it loaded with oil. I >>have no >>experience with this car but I'm guessing that is >>abnormal. The >>achives talk about this, but it's not clear to me exactly >>how to tackle >>this problem. Looks like I need to take off the valve >>cover and work >>my way down. The manual shows a plate that has grommets >>that I assume >>seal the plug stems, but I've seen some advice about >>taking off the >>rocker arm. Can I get away with new grommets and a new >>valve cover >>gasket? I also figure I'll check the valve clearance >>while I'm in >>there. >>Bob >> > > > |
#4
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Oil around spark plugs 1991 2.2 EFI engine
lswpubrw wrote:
> 1991 Accord EX wagon, 192k miles. I had some trouble getting through > the emissions inspection this year excess NOx. I've checked the EGR > valve by the manual, vacuum on the port, and it doesn't stall the > engine just slowed it down a little so I'm figuring I need to cleanup > or replace the EGR. google this group for info on how to do it. they may even be a pdf on tegger's website. > I figured I might as well also tune the engine > since I've acummulated 15k miles since the car was given to us. I > pulled a spark plug wire and found it loaded with oil. I have no > experience with this car but I'm guessing that is abnormal. yes, but very common. > The > achives talk about this, but it's not clear to me exactly how to tackle > this problem. Looks like I need to take off the valve cover and work > my way down. just replace the seals in the cover - the big one around the edge and the 4 donuts that seal the plug holes - the "b" gaskets. > The manual shows a plate that has grommets that I assume > seal the plug stems, but I've seen some advice about taking off the > rocker arm. Can I get away with new grommets and a new valve cover > gasket? yes. cost about a buck each and take about 10 minutes to replace. this fixes the leak every time. go to any parts store - they'll have them because its such a common failure. > I also figure I'll check the valve clearance while I'm in > there. good idea. check the timing belt while you're there too. it's very common for it to be incorrectly tensioned. > Bob > |
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