2001 CR-V EX 4WD Auto
Darn, really sorry to hear that. Is it still throwing all the same codes?
Yes the valves certainly surprised me, considering everywhere I looked said that a valve adjustment lasts anywhere from 30k - 60k miles. At the same time though the mechanics I took it to may not have adjusted them properly, but it did run better after they adjusted them so who knows.I used to own a 1969 VW van with the 1600cc air cooled engine. The valve covers were held on by a wire hook and could be removed without even using a screwdriver. Valve adjustment was a normal part of routine maintenance. The CRV valve lash adjustment is a hot topic considering that the recommendations are vastly different between North America and the rest of the world. It’s for sure best to learn how to do it and then make it a routine part of maintenance like changing the oil. I’m going to do mine in spring and this thread was a great. I learned the copper spark plugs I put in a few years back really don’t have much of a service life, and to do my valve lash on a yearly basis (which I haven’t been doing).
I hope that with checking the valve lash, doing the timing and re-installing my original fuel injectors after cleaning (removing the junkyard ones which are higher mileage lol) I can get back down to a reasonable fuel consumption rate.
They are relatively low rpm engines, so the valve springs are pretty weak, which helps. I'm sure the valves float pretty bad above 5000 rpm, but most don't get driven like that. The majority of people i see driving old hondas are senior citizens who baby them, or teenagers who run the [Edited Out] out of them. I have no doubt they last though. Mine is at 340,000 miles.I believe it was a recall wasn’t it?
the thing is, if it’s a defect in these engines how come they have the reputation of lasting over 300k km’s?
Thanks for sharing the info John! I've wondered what might actually cause the tightening -- you've clarified that for me.They are relatively low rpm engines, so the valve springs are pretty weak, which helps. I'm sure the valves float pretty bad above 5000 rpm, but most don't get driven like that. The majority of people i see driving old hondas are senior citizens who baby them, or teenagers who run the [Edited Out] out of them. I have no doubt they last though. Mine is at 340,000 miles.
Like anything else mass produced, I'm sure there were some put together differently, or with different materials. Most have been repaired or are no longer on the road.
Auto editing posts on this site... Pretty sad. You can no longer even type the word p i s s. It was a nice run. I'm not here to appease your sensitive advertisers. Take care, cut your hair
The seats do not move. If they do they will completely ruin that port where the seats are pressed in. The seats are held by an interference fit in a counter bore, that restricts any movement. What causes the valve recession is the slow abrasion of the valve face when closing against the hardened seat. When reconditioning a head, very rarely are the seats removed, they are just either cut with a Serdi type machine or ground with grinding stones.The valves get tight from the seats being driven into the head. At some point, you run out of adjustment.