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88' honda civic
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467 Posts
Discussion Starter · #1 ·
So I decided to not leave well enough alone and change my valve seals on my d16z6 mini me. I changed them with the head on the car with the cylinder full of rope method. I out everything back to get her and fired her up. Now like I said I have a miss fire and a ton of rocker noise. It seems to be cylinder 3 that has the miss as the way the car runs doesn't change much when I pull the plug wire. Ant idea where I could have gone wrong or what I can do to fix the problem? I did change the spark plugs just for grins and it didnt help. Thanks for any help up front.
 

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93 Civic HB SI
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1,701 Posts
You didn't leave tools under there did you? lol I have to ask! Pull cover back off and make sure nothing is binding or that keepers/retainers popped out (rare, but I have seen guys not install keepers correctly and this happens during the first crankover. Of course, you usually hear in-cylinder crunching noises as the valve dropped lol.

If you don't hear the crunch crunch of a valve bouncing around freely in the cylinder, you're positive you've set cylinder #3 to TDC while performing the adjustment on #3?

I would definitely yank the cover back off, pull the plug out of the suspect cylinder, insert a LONG piece of straight coat hanger wire or a long ass 1/4" extension and rotate the crankshaft until you have visual confirmation of TDC on that cylinder. Wiggle your rocker arms and see if they are too loose.

If rocker arms are too loose, you will have a misfire and excessive valvetrain noise. From the sound of things, it didn't misfire/make noise until after you did the valve stem seals so definitely head back to the places you touched/disassembled.
 

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88' honda civic
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467 Posts
Discussion Starter · #3 ·
You didn't leave tools under there did you? lol I have to ask! Pull cover back off and make sure nothing is binding or that keepers/retainers popped out (rare, but I have seen guys not install keepers correctly and this happens during the first crankover. Of course, you usually hear in-cylinder crunching noises as the valve dropped lol.

If you don't hear the crunch crunch of a valve bouncing around freely in the cylinder, you're positive you've set cylinder #3 to TDC while performing the adjustment on #3?

I would definitely yank the cover back off, pull the plug out of the suspect cylinder, insert a LONG piece of straight coat hanger wire or a long ass 1/4" extension and rotate the crankshaft until you have visual confirmation of TDC on that cylinder. Wiggle your rocker arms and see if they are too loose.

If rocker arms are too loose, you will have a misfire and excessive valvetrain noise. From the sound of things, it didn't misfire/make noise until after you did the valve stem seals so definitely head back to the places you touched/disassembled.
8
Haha, no tools left in there. It purred like a kitten before I messed with it. Although I didnt go back and adjust the valves when I was done. I guess I just assumed I didnt have to because I just unbolted it and put it back. Pulled the cover everything moves freely, even drove it home. I pull the cover back off tomorrow and run 3 up to TDC and see if there is play in the rockers. Do you think I need to just readjust the valves?
 

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88' honda civic
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467 Posts
Discussion Starter · #5 ·
You didn't leave tools under there did you? lol I have to ask! Pull cover back off and make sure nothing is binding or that keepers/retainers popped out (rare, but I have seen guys not install keepers correctly and this happens during the first crankover. Of course, you usually hear in-cylinder crunching noises as the valve dropped lol.

If you don't hear the crunch crunch of a valve bouncing around freely in the cylinder, you're positive you've set cylinder #3 to TDC while performing the adjustment on #3?

I would definitely yank the cover back off, pull the plug out of the suspect cylinder, insert a LONG piece of straight coat hanger wire or a long ass 1/4" extension and rotate the crankshaft until you have visual confirmation of TDC on that cylinder. Wiggle your rocker arms and see if they are too loose.

If rocker arms are too loose, you will have a misfire and excessive valvetrain noise. From the sound of things, it didn't misfire/make noise until after you did the valve stem seals so definitely head back to the places you touched/disassembled.
Well once again thank you guys for your help!!! The valve lashes were all outta wack. Miss fire gone, rocker noise gone!! Back to purring like a kitten!! There a reason I've been here since 2006!!
THANKS AGAIN!!!!
 

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08 H-D Ultra Classic
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998 Posts
No problem. Any time you disturb rocker arms for any reason, always perform lash adjustment!
^^^ This a million times over.

Why would you take anything apart in the head and not check the lash afterwards?
 

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88' honda civic
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467 Posts
Discussion Starter · #8 ·
No problem. Any time you disturb rocker arms for any reason, always perform lash adjustment!
^^^ This a million times over.

Why would you take anything apart in the head and not check the lash afterwards?
I was in a rush to get it done to go home. And like I said a just "assumed" all would be good to go back together. Lesson learned.
 

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08 H-D Ultra Classic
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998 Posts
Hopefully not much damage was caused before you found the cause of the noise.
I wont take long for damage to occur under normal load when things are out of clearance/adjustment.
New wear pattern could occur within a few revolutions/cycles.
 
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