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Now that everything is back together after doing my timing belt and radiator on to the next thing. Even before doing the timing belt there has been bit of shake at idle that started approximately 20k miles ago. The truck now has 105k on it.
After doing the timing belt it got worse. I am about to do the defacto test for the motor mounts by putting the vehicle in gear with the break on and reving the engine in drive and reverse to see the movement.
My plan for this weekend is to:
1) Put the vehicle back at TDC to verify for a second time that I am not off a tooth on one of the cams. I don’t think this is the issue as I was supper careful, but then again I left a shipping plug in the radiator when I installed it. Also there is no loss of power and I feel zero vibrations once over 1000 rpms.
2) Do the motor mount test as described above.My question to all of you that have some experience with this type of thing is if it is a motor mount is it more likely that it is the side mount on the passenger side? I did check this when I had it out to do the timing belt but it looked fine. From what I understand about the front mount I don’t think it being bad would cause a shake at idle so I would think it would be the one at the transmission or the side. My wife’s oddy would shake when accelerating when her front mount went bad but was fine at idle. Of course the side one I can change out in 30 minutes so that would be the easiest thing to try.
It is noticeably worse when the vehicle is in gear and at a stop. If in neutral I can sense it, but it is very minor. The only way I can relate this to the timing belt would be if I am off a tooth, but I would expect other symptoms, or putting pressure under the oil pan to remove the side mount exacerbated what started failing at 85k.
There is another possibility, but not sure it is feasible. Could air in the cooling system cause a minor shake like this? I thought it would be more of an up/down type of symptom.
Your thoughts? I did review the videos in the stickies.
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Just did the engine reving test with the wife. In drive there is a small amount of movement when gunning the engine. I can see it flex a bit where the side mount is. Putting it in reverse though, there is considerable movement as the engine moves forward quite a bit.
I still plan on checking the cam timing, but once again, it does not seem like that is the problem unless others have seen the same being off a tooth in one direction or another on a single came shaft.
Check the timing again. here two links to help you. if you
have a scanner you can read timing in live data.http://www.ericthecarguy.com/faq/solving-automotive-idle-problems
http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
Those are liquid filled mounts. When they go bad, the fluid leaks out. If you don’t see fluid near the mount, it’s probably good and you should look elsewhere for the cause of your idle issue. I cover Honda idle issues extensively in this article. Perhaps there some information in there that can help you with this issue.
http://www.ericthecarguy.com/faq/solving-automotive-idle-problems
Good luck and keep us posted.
Hmmmmmm, on my wife’s Odyssey it was not leaking but the front mount was definitely bad causing vibrations while accelerating.
This is not an extreme idle issue, but just a bit of shake. Can cam timing cause that without causing a performance issue? It is smooth as silk as soon as you give it a bit of gas.
I will do the plugs this weekend and the air filter and see if that helps as well. First thing tomorrow I am going to verify the cam timing though.
Well, it was the off one tooth on the rear cam. Since I am so good at taking the truck apart at this point I had that done in about 2 hours. I then changed all 6 plugs. Damn those ones in the back are a bitch if you have that sport bumper thingy.
Now it runs like it did before I did the timing belt. It has a faint vibration in the steering wheel that has been there for a while but I am so glad that my hands are not shaking like I was driving the Roadking I use to have.
I did not do the valves but they are quiet and at this point I think I will try to tackle the slight vibration that not even the Honda dealer could figure out for another 10k or so. The one big mistake I made doing the timing belt was to not turn the flywheel 360 degrees to get the rear cam lined up. It looked lined up with the front cam reference in place but in fact was not.
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