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Ant240
08-07-2004, 04:24 PM
i need help! i got some s13 cams going into my 98 s14. I screwed up and didn't mark the cams, and I don't see any black links on the chain, just one yellow. I got the cams in anyway. I don't remember if I set the engine at TDC #1, but the #1 cams were facing away from each other when i got the cams in. I'm probably way off on the timing. The engine started at first but died, then it wouldn't start again.

so I'm about to try again. is there a way to determine if #1 is at TDC aside from the cam lobes facing the other way? and I don't know if the chain does have 2 black links or not, so how do i know if the timing is correct? I have an FSM, not enough help. please help if you can.

AceInHole
08-07-2004, 07:38 PM
Engine is at TDC when the crank pulley is at the yellow mark on the indicator (used for setting timing). If your crank is discolored or dirty, it'll be the second notch from the left.

You'll also want to make sure you're on the compression stroke for cyl 1. Pop the distributor cap off and make sure the rotor is facing your #1 spark plug lead.

Also, ALWAYS hand crank the engine at least once to make sure you've got it right and don't have any valve/ piston contact. Cranking it right away with an improperly set cam could spell a catastrophic engine failure.

Ant240
08-07-2004, 09:12 PM
thanks Ace. now, should i rotate the crank with the cams out? and if I do take the cams out, will i be able to rotate the crank by hand since there is still compressed air in the cylinders? how do i release this air? damn, all this could've been avoided had I marked the timing. gahh http://forums.freshalloy.com/images/graemlins/tear.gif

'97 S14 SE Turbo
08-07-2004, 09:21 PM
Happened to a AZ guy. The fix was a new head. He bent the valves when he fired it up.

_Def_
08-07-2004, 10:14 PM
Happened to a AZ guy. The fix was a new head. He bent the valves when he fired it up.



Yep - sounds like you bent some valves. Maybe you got away clean and it's just not firing with the timing off, but things don't look good...


I'd take the chain off the cams before bring #1 around to TDC. Sounds like you've got them pretty far off, so you might as well stop moving the valves around at the wrong times.

SRFiveTen
08-08-2004, 12:13 AM
how do i release this air?


by removing your spark plugs, may be?

Kookz
08-08-2004, 01:58 AM
Happened to a AZ guy. The fix was a new head. He bent the valves when he fired it up.

And a CT guy...

http://www.andrew.cmu.edu/user/brjones/head%20007.jpg

http://forums.freshalloy.com/images/graemlins/grin.gif

canyoncarver
08-08-2004, 06:20 AM
I'd take the chain off the cams before bring #1 around to TDC. Sounds like you've got them pretty far off, so you might as well stop moving the valves around at the wrong times.



Taking the chain of won't keep the pistons from hitting the valves. Taking the chain off guarantees that the pistons will hit the valves. If you don't know where you're at, you should take the cams back off before turning the crank.

But again, it's probably too late.

Ant240
08-08-2004, 01:23 PM
well it still working! http://forums.freshalloy.com/images/graemlins/grin.gif got the cam swap right this time for sure. but i have one more question. the fsm lists the torque for the cam bridges something like 17 in-lbs, that calculates to about 1.5 ft lbs, is that right? I didn't torque them to that, my torque wrench doesn't click that low, so i just tightened em down with the ratchet. is this enough?

and the car runs like a champ! purrs like a rev-happy engine. thanks for all the help!