Okay so the setup is a D16Y7 block with a supposedly D16Y8 head but has a Z6 manifold. I got screwed by a fellow honda-tech member... but pretty much I got the head and block already assembled minus timing belt, crank pullley and a billion other small crap.

Anyways to the problem..
So I lined up the crank to TDC according to the gear and the mark on the front cover. Lined up the cam pulley with UP mark and left and right cam marks with the pointers on the timing belt cover. Installed timing belt and installed the motor. Started it up and got a weird cranking sound like my timing is off. Checked timing again and found that it was kinda off so I adjusted accordingly and did this over about 5 times moving the cam pulley 3 tooths back and fourth.

I checked compression and found cylinder #1 with about 95 psi and #3 with 65 psi. What does that mean? Timing off?

Finally I got it started once by gassing it while starting and it sounded like the timing was off and had it running for about 2 seconds then all of a sudden I hear a loud *clank* and the motor stopped. Looked like the timing belt jumped a tooth or something now the timing looks right on and sounds like the video attached below.

What else can I check? I checked firing order on distributor, advance/retard of timing, fouling of spark plugs, battery voltage.

http://www.youtube.com/watch?v=6y_vMJr6VcA

 

20 views and no posts?

 

read and watched the vid. Hard to say man.
I'd take the side cover off, and look at the tdc mark on the block and make sure the crank belt gear looks like its lined up.
hopefully its the right timing gear on the cam and the block.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EFbomb &raquo;</TD></TR><TR><TD CLASS="quote">read and watched the vid. Hard to say man.
I'd take the side cover off, and look at the tdc mark on the block and make sure the crank belt gear looks like its lined up.
hopefully its the right timing gear on the cam and the block. </TD></TR></TABLE>

So I got it started. Since the camshaft rotates 180* for every full 360* turn of the crankshaft, I rotated the cam 180*. Timing still sounds off.. it starts up rough and idles rough. Advanced/retarded my camshaft one tooth each way and still runs rough. Any ideas?

 

 

Which crank pulley are you using? I'm not sure if they're different, just wondering if the timing marks on them might be.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94CivicSi &raquo;</TD></TR><TR><TD CLASS="quote">Which crank pulley are you using? I'm not sure if they're different, just wondering if the timing marks on them might be. </TD></TR></TABLE>

I thought of that already. Im using a D16Z6 crank pulley on the D16Y7 block. I did the screw driver in the #1 cylinder method and TDC is right where the white mark is on the pulley, so I know thats right.

 

the rear cam cover has a mark to line up for the 1.6l motor and the 1.5 l will be even with the head.
sounds like timing belt is off 1 tooth

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dtapia &raquo;</TD></TR><TR><TD CLASS="quote">the rear cam cover has a mark to line up for the 1.6l motor and the 1.5 l will be even with the head.
sounds like timing belt is off 1 tooth </TD></TR></TABLE>

I'm lining up the cam gear with the marks on the rear cam cover. I rotated the cam gear 1 tooth adv. and retard. Still runs rough.

 

hmm did you bend a valve ? something don't sound right .


Modified by dtapia at 7:37 PM 9/8/2008

 

Take the crank pulley off and line the mark one the crank belt to the oil pump and then line up the cam and should work fine.

 

I hope I dont have bent valves....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSR_hatch936 &raquo;</TD></TR><TR><TD CLASS="quote">Take the crank pulley off and line the mark one the crank belt to the oil pump and then line up the cam and should work fine.</TD></TR></TABLE>

Since he did a timing belt, I'm going to assume he verified the timing on that mark.

Could be time to find a leakdown tester. If it backs up the horrible compression numbers and you can audibly hear air getting past closed valves, it's time to pull the head. Bent valves is starting to sound right.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94CivicSi &raquo;</TD></TR><TR><TD CLASS="quote">

Since he did a timing belt, I'm going to assume he verified the timing on that mark.

Could be time to find a leakdown tester. If it backs up the horrible compression numbers and you can audibly hear air getting past closed valves, it's time to pull the head. Bent valves is starting to sound right. </TD></TR></TABLE>

Doing a compression text tonight.. and if I get bad numbers I guess I'm doing a head job.