Looks like I have a stretched timing chain and working on replacement. It has skipped a tooth on the front cam and two on the back. I am worried about damage to the valves or problems othe than the chain and tensioner. Looking for any advice before I start buying parts.
How many miles on the engine?
Year?
How long have you owned it?
Was it burning oil?
What was your oil change interval?
Symptoms before you pulled the cover to look?
etc...
One or two teeth on the cams will not bend the valves. You need to pull the cam chain cover and inspect the tensioner and see how far the chain tensioner is out now. You can do that without pulling the whole cover at the inspection plate opening but you will probably need to inspect the guides as well anyways.
if it turns over but won't start, Im guessing that it has weak compression, which would be caused by bent valves if the timing was off. Get a compression test done
Bent valves will give you 0 compression. Your compression values will not be correct when the timing is off. Easy to check for 0 compression without a tester.
I'm quite certain my mechanic told me the 2.4L engine is a non-interference engine when I bought the car. He was quite specific that if the chain breaks, I have no worries. I'd be interested if anyone knows of an authoritative source that says otherwise.
I guess the photo is to large. The front cam was lined up the back one is on top of the gear and of by one and a half links. I'm going to replace the chain and the tensionor. The guides and gears all look fine. Any thoughts about replacing the vtc actuator or should I put back together and see if I get a code first.
I would not replace it unless truly necessary. It sits on the outside anyway. You will not have to dig back into things if it ends up needing replacement.
I have the new chain on with all the timing marks in the correct, the tensioner and guides are back in place. Should I hand rotate the crank to see if any valves hit? If so should the timing marks come back in line when I get back to TDC?
I would rotate it 2 full revolutions and make sure you put some pressure on the left guide to make sure the tensioner is lock as tight as possible. At 2 revolutions the cams and the marked links on the chain should all line back up as well as the crank gear too.
sounds like your a kick ass dude to tackle a job like that without doing this for a living. respect to you! I mean that.
The only thing nobody mentioned (and im sorry that i chimed in late) is with that kind of mileage, it IS recommended that when replacing a chain, or sprocket that the chain rides on, you replaced all the sprockets with the chain. These parts wear together, and if not all replaced together, they CAN prematurely wear eachother out. In my 9 years with honda i have only seen that happen a 2-3 times that i remember so hopefully you wont have anything to worry about. However i haven't often been in the position to see that happen. Meaning, its our shop policy to do all the sprockets and chain as a set, so we haven't had much reason to see premature wear due to only replacing the chain.
That being said, im not sure if this is a "honda written rule", however i do know that this is well known amongst some very talented, long time techs that i know who work for other makes as well as with me at honda. This was also a point that was discussed by the Honda instructors at their training centers in Windsor Lock CT during one of my weeks spent there for training.
Before someone chimes in to say that dealers only do this to "upsell" more parts, that IS NOT the case. The tech working on the car is the one who determines what the advisor sells. And as a tech, we dont give two shits about upselling parts. The extra labor involved to replace all the sprockets is to miniscule that we wouldnt care about trying to push for the labor. We sell them because we dont want the car shoved back up our butts if the the parts prematurely wear. At my dealer, if that happened because we didnt recommend what we should have, we would be doing the repair for free. Not just at no charge to you, but the tech would not get paid to do it. I will admit there are times that we replace parts "just in case" or the "when in doubt throw it out" mentality. But most customers wouldnt understand if it came back with a problem because we tried saving them money the first time around. Hell everyone thinks there always getting ripped off anyway.
Im sure you'll be ok though. I wouldnt worry. worse case scenario, you know how to do the job if you had to do it again. your certainly not scared to dive right in. again, kudos.
Thanks. For the support. I put 100 miles on it today feels as strong as ever. Definitely my biggest repair. The only other thing it ever needed was an alternator.
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