My engine light is on and its running rough so I thought it's time to adjust the valves. It has 155k miles on it and I have adjusted the valves before. I adjusted them all, but the exhaust valve on the far left (Passenger side) will not adjust. No matter how much I loosen the the set screw I cannot get a feeler gauge in. The only way to get a feeler gauge in is to push down on the valve with a screwdriver but when I release the valve it just pinches the feeler gauge tight.
What does this mean when a valve won't adjust?
I just eyeballed the setting to the one next to it and put it back together and it's still running very rough. Any ideas about this? Maybe I will back the set screw a little more and try it again.
If you own a 1999 through 2001, Honda had a valve seat issue with these. There's a TSB (service bulletin) that Honda released to the Honda techs years ago. When they upped the hp on these engines from 127hp on the '97 & '98s, to 146hp in the '99 to '01s, it generated more heat. The alloy they used for the valve seats in the cylinder head would essentially mush down and recede into the head. I had an '01 that I bought new. It began to need its first valve adjustment at 55k miles. I called American Honda's "goodwill" department, (all automakers have that "hidden warranty" dept., but if you're up over 100k miles, forget that route.). I opened a case with them, and complained till I was blue in face that it states in the owner's manual to merely "check valve adjustment at 105k". They told me it was only a recommendation, and not a hard rule. They refused to pay for that valve adjustment, as well as 2 more. However, since I had proof that this was a known issue, the dealership that I dealt with at that time reopened the case for me, because they said the valves ran out of adjustment room, and that it would need a new cylinder head. However, I kept on those valve adjustments, because the people who were not in-the-know and didn't keep up with them, ended up with burnt exhaust valves, and the check engine light (MIL) coming on. So, if you're light came on and it was related to this issue, you most likely have the dreaded burnt exhaust valves already. You will need to replace the bad valves, and the cylinder head, plus all gaskets, bolts, etc...that go along with the job. My CR-V needed that done at 93k miles, so while they had the engine open, I also had them do the timing belt & water pump kit, since that would need replacing at 100k anyway. Good news is, I ended up driving that car to 296k miles with no further valve/cylinder head issues. But I did have them check & adjust the valves again at 200k to just because that's what was recommended. And they were only slightly out of spec. So, Honda did redesign those replacement heads. The bad news is, it's a very expensive job if you can't get Honda's goodwill warranty Dept to cover at least the labor cost like they did for me. But, they told me that if the vehicle had over 100k miles on it, they would not cover any of it. The price without warranty from a Honda dealer back in 2009 would've been about $3800 for that job! I paid about $840. Sorry for that bad news. 😔