The 3G Ramblings & General Discussion Thread (Part 2)
What tf are you talking about nukka.. nothing's lined up in that pic. 
Considering you have a frankenstein pair of heads.. those marks don't mean shit unless they properly installed the cams. I'm guessing the cams were pulled with the pulley attached and directly swapped. I'd be concerned that that the front cam was installed in the rear head (I'm not sure that's even possible).
Line this up (highlighted in yellow).. then check to see if the valves are closed on the first cylinder (lobes up). Just for shits, check TDC on the crank, you should see the first cylinder at the peak of the compression cycle (all the way at the top). This means at peak compression, all valves are closed and in time.. keep rotating, exhaust valves open up on the exhaust cycle, piston goes down, intake valves open up as exhaust valves close, then back to compression stroke.
Worse case, line it up by hand by following the valve cycle, as the intake valves close, check the marks.
Considering you have a frankenstein pair of heads.. those marks don't mean shit unless they properly installed the cams. I'm guessing the cams were pulled with the pulley attached and directly swapped. I'd be concerned that that the front cam was installed in the rear head (I'm not sure that's even possible).
Line this up (highlighted in yellow).. then check to see if the valves are closed on the first cylinder (lobes up). Just for shits, check TDC on the crank, you should see the first cylinder at the peak of the compression cycle (all the way at the top). This means at peak compression, all valves are closed and in time.. keep rotating, exhaust valves open up on the exhaust cycle, piston goes down, intake valves open up as exhaust valves close, then back to compression stroke.
Worse case, line it up by hand by following the valve cycle, as the intake valves close, check the marks.
thanks. I have the crank at TDC. Cylinder #1 is at the top
what I'm trying to say is; when I swapped over the rockers, the rockers are sitting on a high lobe(?) and when I spin the pulley to match up the "yellow marks" on the head, the lobe falls and the mark on the pulley completely goes PAST the yellow mark on the head.
Does this mean I installed the rockers wrong?
btw, thanks for explaining it.
for the rear head, TDC should be all closed valves. (just thinking out loud here)
the front head gave me no problems and the marks are lined up. it's at TDC. crank is at TDC.
the rear is blah.
for the rear head, TDC should be all closed valves. (just thinking out loud here)
the front head gave me no problems and the marks are lined up. it's at TDC. crank is at TDC.
the rear is blah.
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Could it be the wrong cam, like he stated? Doubt it
I do recall when lining up the new belt, the front held fine at TDC on it's own but the rear rotated back one like and my mark was where yours is in the picture.
Basically rear 1,2,3 fought me to line up the TDC, I had to get a ratchet/socket on the cam gear to pull it back to line the TDC marks line up as I used the belt to hold it in place (during the counter clockwise from crank pulley taught install of the belt to ensure slack ended up at tensioner).
Does that make sense?
That's why I was thinking that maybe without it being on the car with belt in place, it just wouldn't hold on it's own...maybe a characteristic of the cam lobe on the rear for TDC?
I do recall when lining up the new belt, the front held fine at TDC on it's own but the rear rotated back one like and my mark was where yours is in the picture.
Basically rear 1,2,3 fought me to line up the TDC, I had to get a ratchet/socket on the cam gear to pull it back to line the TDC marks line up as I used the belt to hold it in place (during the counter clockwise from crank pulley taught install of the belt to ensure slack ended up at tensioner).
Does that make sense?
That's why I was thinking that maybe without it being on the car with belt in place, it just wouldn't hold on it's own...maybe a characteristic of the cam lobe on the rear for TDC?
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Well, I could be totally wrong, man...but I TOTALLY do recall the rear cam rotating back a mark and I couldn't get it to stay until I used the ratchet and then routed the belt tooth over it to hold.
I havent even finished putting all the timing belt stuff in.
so, I cant even use the belt at the moment.
the service manual says to get rear head at TDC before putting it on the short block.
I was thinking of installing the heads, then finishing the timing belt pulleys, then I can loop the belt over the head pulleys. butt, if rear head isnt at TDC, I dont want to install yet!!!
so, I cant even use the belt at the moment.
the service manual says to get rear head at TDC before putting it on the short block.
I was thinking of installing the heads, then finishing the timing belt pulleys, then I can loop the belt over the head pulleys. butt, if rear head isnt at TDC, I dont want to install yet!!!
Last edited by justnspace; Aug 3, 2014 at 09:13 AM.
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Justin, is there a reason you dont have any cylinder marks on your cam pulley?
The cam pulley should have cylinder marks on them
EDIT: nevermind that, the rear does not have cylinder marks on them, just the TDC
The cam pulley should have cylinder marks on them
EDIT: nevermind that, the rear does not have cylinder marks on them, just the TDC
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I was about to say that but didnt want to due to the limited knowledge I have on this subject....
the only thing which I was reading said "do not force the cam pulley to turn when it offers resistance"....now this could be applicable if the heads are installed on the car (with the belt off) and not when the heads are off the car....it did say that you can damage the valves by doing so....
the only thing which I was reading said "do not force the cam pulley to turn when it offers resistance"....now this could be applicable if the heads are installed on the car (with the belt off) and not when the heads are off the car....it did say that you can damage the valves by doing so....
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From: Waffles, BU
You guys can sure fill up a page with bullshit.
Justn, at TDC, are the valves closed on the cylinder 1?
It's super difficult to fuck up a rocker installation. It's almost fool proof.. but just for shits, show us your handy work.
If done correctly (I doubt you could swap rocker arms, rollers should be down on cam lobe, valve rockers angled in), it shouldn't effect the timing at all.
Justn, at TDC, are the valves closed on the cylinder 1?
It's super difficult to fuck up a rocker installation. It's almost fool proof.. but just for shits, show us your handy work.
If done correctly (I doubt you could swap rocker arms, rollers should be down on cam lobe, valve rockers angled in), it shouldn't effect the timing at all.
I started over.
this time, I made sure I aligned TDC before I tightened the pulley.
last time, I didnt take note of where the pulley is supposed to go and just tightened in haste
I have my old J32 head to compare.
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Justin, am just thinking out loud here and I bet Maj will come in and yell at me...
while 1 cylinder is in compression (both valves closed), the other is in intake (intake valves open) and the 3rd is in exhaust (exhaust valves open), that does look ok to me...again this is just from theory and my my head talking out loud....
while 1 cylinder is in compression (both valves closed), the other is in intake (intake valves open) and the 3rd is in exhaust (exhaust valves open), that does look ok to me...again this is just from theory and my my head talking out loud....
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just looked up the firing order and does seem in sync with my thinking
https://acurazine.com/forums/2g-cl-2001-2003-50/firing-order-739865/
https://acurazine.com/forums/2g-cl-2001-2003-50/firing-order-739865/
