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Thread: HOW TO: Check camshaft timing

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Posts: 1-10 of 13
2011-03-27 19:53:41
#1
HOW TO: Check camshaft timing


KEY:
White dots = The small dimples on the cam gears.

Yellow dots = Roll pins through the links holding the chain together.

Red lines = Where the respective dimple on the cam gear should "pass through" the chain. This line demonstrates how many links/roll pins etc... should be in between each dimple on the cam gear.

Green circles = The keyhole on the cam gear where the dowel pin on each cam will fit into. Note the orientation.


This is with the engine at TDC (Top-Dead-Center) for Cylinder # 1. It is not at TRUE TDC because the chain links are in a different part, but for all educational purposes, it will look like this with Cylinder #1 at TDC.

If you have a pulley that is aftermarket, check which hash marks represent what numbers of timing. (Note: Sometimes the stock pulley can separate and give false readings.

On the B14 OEM pulley, the 2nd hash mark from the left represents 0* or TDC at the crank.



Once again, you want the pin that is stick out from the block to be right on top of the 0 degree mark.
Last edited by Kyle on 2012-12-13 at 05-19-13.
2011-03-28 05:30:06
#2
Note this is with #1 cylinder at TDC with cam lobes facing outwards on #1 cylinder.
2011-04-19 03:58:26
#3
Word! Thanks for this. I was just about to search for it.
2011-04-19 04:21:23
#4
If you can't understand this by now, just put the valve cover back on...you are in above your head! I hope it helps many more from ruining some nice engines.
2011-05-27 06:49:35
#5
I wish I had seen this a few weeks ago.

You should post some pics of the crank too since you have to line it up with the markers on the pulley. I usually throw a big screwdriver or collapsing magnetic stick in the first cylinder too. I usually pull all 4 lugs so the motor is easier to turn over but thats just me. you just have to clean up a bit first so nothing falls into the cylinders.

Your motor has a bit of sheen to it and that is pretty normal. I almost trust a motor that has a bit of a tan more than a clean one.
Last edited by Benito Malito on 2011-05-27 at 07-04-11.
2011-05-27 12:45:58
#6
Originally Posted by Benito
I wish I had seen this a few weeks ago.

You should post some pics of the crank too since you have to line it up with the markers on the pulley. I usually throw a big screwdriver or collapsing magnetic stick in the first cylinder too. I usually pull all 4 plugs so the motor is easier to turn over but thats just me. you just have to clean up a bit first so nothing falls into the cylinders.


All good and helpful points, thread has been adjusted.

Originally Posted by Benito
Your motor has a bit of sheen to it and that is pretty normal. I almost trust a motor that has a bit of a tan more than a clean one.


She is not bad for being 205,000 miles on original engine/headgasket. Just opened the valve cover up a few times, changed cams, changed the water pump last winter and she still nets around 27-30 MPG each week. I love it! Oil changes every 3,000 miles keeps the nasty gunk away.
2011-11-14 20:01:55
#7
Are there supposed to be marks on the chain for where each point is when the motors at top dead center? I thought it was the japan symbols on my 93 chain. But once I looked closer one side of the chain for the cam has TWO japans
2011-11-15 04:52:11
#8
What matters (to some degree or not) are all of he points of reference being displayed in your engine as in the picture I gave.

The marks on the chain will line up when everything is at TRUE top dead center.
2011-11-19 04:17:43
#9
Yeah my problem was the chain was old and the marked links paint had fallen off lol. Should be good now though
2011-11-19 05:00:04
#10
Originally Posted by Viprdude;687055
What matters (to some degree or not) are all of he points of reference being displayed in your engine as in the picture I gave.

The marks on the chain will line up when everything is at TRUE top dead center.


so very true..i remember when i put in my old BC2 cams i triple checks everything..had a bunch o pics in that thread...if you ever wanted to compile some....extras let me know

awsome thread tho,will problly scan oce or twice when i do n1s soon
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