The Y2K Accord recently threw a CEL for EGR insufficient flow.
The lower intake manifold carries EGR gasses from the EGR valve to the upper intake manifold where the exhaust is vented into the two "halves" of the intake and taken in by all 6 cylinders. The hole is probably 7 or 8 mm across and it gets clogged easily. Honda revised their intake manifold design a few years later with the J32 to make it much easier to rectify this EGR issue.
The job involved removing the upper intake and cleaning the port in both the upper intake and the lower intake where it runs down to the EGR valve. Since this car has 201k miles and is due for a valve adjustment, I took this opportunity to do that as well. As expected, the intake valves were all loose and the exhaust valves were all tight.
The inside of the engine was interesting. The front bank, cylinders 4, 5, and 6, was very clean and I was impressed. The rear bank, cylinders 1, 2, and 3, was much more varnished and darker. I suppose the rear bank doesn't get the same cooling as the front bank.
This car was purchased used in 2003-4 and has stayed within the family that bought it. It was the father's daily driver until ~2010 when it was handed down to the daughter. He took very good care of the car (it's on its original trans!!!) and serviced it on time. The daughter worked a paper route with the poor thing and severely neglected the car in all aspects. After the daughter moved out, it was handed down again to the son who owns it today. It has had oil changes mostly at quick lube places with anything from 5w-30 and 10w-30 bargain conventional to high mileage oils and synthetics. Currently, it runs with Pennzoil High Mileage 5w-30 and a Pennzoil HPZ oil filter at 4000 mile intervals. The engine uses seemingly no oil during the OCI and I'm quite impressed. The engine runs like new.
Anyway, the EGR procedure worked, the valves sound like a sewing machine, the engine is smoother at idle and pulls all the way to redline like a champ. The insides were very clean and I'm impressed with the overall condition of the engine. My only regrets with the entire repair and service was that I had just done an oil change a week before the CEL illuminated, and I didn't take enough pictures. I'm confident the HPZ will catch any contaminates that fell into the engine during the procedure, but I would have liked to have had this occur at the end of the previous OCI.
Here is the front bank. I don't have a pic of the rear bank but it was varnish tinged brown enough to look like a 200k mile engine. Not sludged by any means.
I'm new to the forum and these few are my first few ice breaker posts.
The lower intake manifold carries EGR gasses from the EGR valve to the upper intake manifold where the exhaust is vented into the two "halves" of the intake and taken in by all 6 cylinders. The hole is probably 7 or 8 mm across and it gets clogged easily. Honda revised their intake manifold design a few years later with the J32 to make it much easier to rectify this EGR issue.
The job involved removing the upper intake and cleaning the port in both the upper intake and the lower intake where it runs down to the EGR valve. Since this car has 201k miles and is due for a valve adjustment, I took this opportunity to do that as well. As expected, the intake valves were all loose and the exhaust valves were all tight.
The inside of the engine was interesting. The front bank, cylinders 4, 5, and 6, was very clean and I was impressed. The rear bank, cylinders 1, 2, and 3, was much more varnished and darker. I suppose the rear bank doesn't get the same cooling as the front bank.
This car was purchased used in 2003-4 and has stayed within the family that bought it. It was the father's daily driver until ~2010 when it was handed down to the daughter. He took very good care of the car (it's on its original trans!!!) and serviced it on time. The daughter worked a paper route with the poor thing and severely neglected the car in all aspects. After the daughter moved out, it was handed down again to the son who owns it today. It has had oil changes mostly at quick lube places with anything from 5w-30 and 10w-30 bargain conventional to high mileage oils and synthetics. Currently, it runs with Pennzoil High Mileage 5w-30 and a Pennzoil HPZ oil filter at 4000 mile intervals. The engine uses seemingly no oil during the OCI and I'm quite impressed. The engine runs like new.
Anyway, the EGR procedure worked, the valves sound like a sewing machine, the engine is smoother at idle and pulls all the way to redline like a champ. The insides were very clean and I'm impressed with the overall condition of the engine. My only regrets with the entire repair and service was that I had just done an oil change a week before the CEL illuminated, and I didn't take enough pictures. I'm confident the HPZ will catch any contaminates that fell into the engine during the procedure, but I would have liked to have had this occur at the end of the previous OCI.
Here is the front bank. I don't have a pic of the rear bank but it was varnish tinged brown enough to look like a 200k mile engine. Not sludged by any means.
I'm new to the forum and these few are my first few ice breaker posts.
