zeplin

Ok, so I'm getting this odd knocking sound. The oil level is fine, using 5w30 as recommended, everything is in check. The only thing I can think of is when we installed this engine we had the wrong firing order and a backfire might have bent the valves. Once the engine warms up it does go away for the most part, but I want to know if anyone has an idea of what it might be. Just trying to fix any potential issue before my engine dies. It's a D15 with 85k miles. Here's the video:

http://www.youtube.com/watch?v=rswktcCG0D0

I should add that the engine runs good, there is no problem whatsoever. It's just that this noise makes me worry quite a bit.

zcar4me

Geezus... thing sounds like a diesel. Try shooting another video when it's warmed up. It's too loud to really tell where it's coming from.

zeplin

Yea, I'll re film it tomorrow after it warms up. Bumping anyway, maybe someone can help before then.

Mugen112

Wow... that's pretty bad. I highly doubt it, but you can try a valve adjustment. It really sounds like something a little more major like a rod knock tho. Do a compression/leak down test.

gsrhatch2356

how about fix the exhaust leak first.

zeplin

Try completely broken exhaust . However, that is obviously of no concern until the engine is running properly; but thanks for being a dick! There's always one in every thread lol

corPsEsss

put an exhaust on that thing. it would be much easier to figure out where that knocking is coming from.. try a valve adjustment.

gsrhatch2356

Damn, I wasnt trying to be a dick. Believe me the time that I have been on HT I have seen my fair share of dicks and I really dont think that I fall in that catagory. I always try to help as much as I can and to the best of my knowlage but you do have to admit that forum diagnositics does not work. In some cases it helps but there is no way that anybody can tell you where your sound is coming from. I have worked on cars that were right in front of me that were making sounds that I couldnt isolate to a certain area let alone over a video that is covered up by a massive exhaust leak or sound. really I am sorry if I offended you but please be a little realalistic... some things just cant be done over a forum. Good Luck man.

zeplin

Oh, I was just being sarcastic bro (again something that's difficult to determine via text on a webpage). It's all good! lol I'm going to have my uncle do a valve adjustment and see where that gets me. When I listen closely it seems to be coming from the head, so if it's still there after the adjustment I may throw on the spare head I have and see if that corrects the problem. If not it's cool, this is just a project I've had sitting around waiting to get a b18 swapped in after boot camp. Sorry for the confusion gsr!

Targa250R

You don't necessarily need to adjust the valves, you just need to check the lash clearance which only requires removal of the valve cover and some feeler gauges. Make sure the engine is cold. Intake should be 0.007" to 0.009"; exhaust should be 0.009" to 0.011". If they are in those ranges, they don't need to be adjusted.

Indeed. The ticking sounds like a potential cracked manifold or manifold gasket leak (especially if it goes away when warmed up), but without any exhaust muffling, it's impossible to make any kind of useful suggestion based on the video.

zeplin

Ok, I'll check the clearance tomorrow, and hell, I'll just go ahead and throw a piece of pipe over the hole for now to quiet it down for another video. I understand it's ridiculously difficult to diagnose something via a video, but every little bit helps. While I'm at it I'll check the exhaust manifold for a crack and/or leak. Thanks

1grex

X3 for valve lash

Ran4it2

did my valve adjustment on my shitty single and it made the ticking go away runs much better. Check out the FAQ under valve lash adjustment its pretty easy

gsrhatch2356

Its all good man. I am hope you get it fixed, like I said even though forum diagnostics dosent work, it sometimes helps enough to get the job done.

The_Honda_Guy

Definitely seems more like it's coming from the top end up it's hard to tell for sure. Like GSR said, it's hard to diagnose where it's coming from unless you can get the camera into specific spots in the engine bay to hear from different angles.

evil_ryu

sounds like ur valves like the other people were saying...

vtechjunkie

iTrader: (2)

valve lash. mine sounded the same way. got the adjustment and it went away.