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Timing!?!?!
ok so i was going to check my timing again last night...so i hooked up the light..killed the garage lights..unhooked the vacuum lines and started the truck and....wtf where is the timing mark!?!?!?!?!?....it doesnt show up AT ALL..NONE..no matter where i put the distributor....i can fully advance it..nothing..fully retard it...still nothing...WHERES IT AT!?!?!?
when i had my VC off a couple nights ago i noticed that my timing chain was a tad bit more loose than what i think it should be.......could it have jumped a tooth?!?!?!?...it's a brand new timing chain..only has about 3500 or 4000 miles on it :dunno: |
U got the light with a dial on the back? if so....is it set to 0? Happened to me before, and I was dumb and didnt notice the dial was at 50* btdc....lol
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Originally Posted by camo31"10.50"
(Post 51301799)
ok so i was going to check my timing again last night...so i hooked up the light..killed the garage lights..unhooked the vacuum lines and started the truck and....wtf where is the timing mark!?!?!?!?!?....it doesnt show up AT ALL..NONE..no matter where i put the distributor....i can fully advance it..nothing..fully retard it...still nothing...WHERES IT AT!?!?!?
when i had my VC off a couple nights ago i noticed that my timing chain was a tad bit more loose than what i think it should be.......could it have jumped a tooth?!?!?!?...it's a brand new timing chain..only has about 3500 or 4000 miles on it :dunno: Did you replace the chain tensioner when you did the chain? Pressure could be bleeding off from it. |
Originally Posted by Gnarly4X
(Post 51301859)
Gentlemen,
Ignition timing has nothing to do with cam timing. Your cam timing could be off 1 tooth and your ignition timing could be right on. Or your ignition timing could be off and your cam timing right on. Did yor pull the right vacuum line off the disty and plug it before you checked the timing? gNARLs. |
Originally Posted by Gnarly4X
(Post 51301859)
Gentlemen,
Ignition timing has nothing to do with cam timing. Your cam timing could be off 1 tooth and your ignition timing could be right on. Or your ignition timing could be off and your cam timing right on. Did yor pull the right vacuum line off the disty and plug it before you checked the timing? gNARLs. Ignition timing is directly related to crankshaft position hence the term "before top dead center"(piston rising on the compression stroke) since the distributor is driven by the camshaft, If cam shaft to crank shaft relation ship changes(ie cam chain jumps a tooth) then ignition timing will also change in answer to your question, if you cant see the mark the truck probably wouldn't run, my guess is, and I have done this myself before, make sure you are on number one plug wire and if it has an advance feature, 0 it |
Originally Posted by Gnarly4X
(Post 51301859)
Gentlemen,
Ignition timing has nothing to do with cam timing. Your cam timing could be off 1 tooth and your ignition timing could be right on. Or your ignition timing could be off and your cam timing right on. Did yor pull the right vacuum line off the disty and plug it before you checked the timing? gNARLs. But this is a whole new thought to me, so maybe I'm way off. |
Originally Posted by wlabrum
(Post 51301905)
Sorry Wrong answer
Ignition timing is directly related to crankshaft position hence the term "before top dead center"(piston rising on the compression stroke) since the distributor is driven by the camshaft, If cam shaft to crank shaft relation ship changes(ie cam chain jumps a tooth) then ignition timing will also change in answer to your question, if you cant see the mark the truck probably wouldn't run, my guess is, and I have done this myself before, make sure you are on number one plug wire and if it has an advance feature, 0 it he is correct, if the cam jumps time so does the distributor since the distributor drive gear is attached to the cam. advance the cam by 3 degrees, ignition timing will advance 3 degrees. |
everything on the motor has been replaced except for the intake and exhaust and pistons..
it runs like SH@! plain and simple..i didnt get around to checking to see if the cam had jumped a tooth..will do it tomorrow (it's kinda chilly LOL).. and yes i removed the lines and plugged them..lol.. no dial on this old light LOL..i bad a gooood one..but i guess somebody thought they needed it more than me :( |
I remember my brother telling me that is harmonic balancer went and he couldn't time the engine. Not even sure it is related or exactly what it is but thought I would toss it out there.
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Did you hook up to the correct spark plug wire?
Sorry, had to ask. |
Originally Posted by Gnarly4X
(Post 51301859)
Gentlemen,
Ignition timing has nothing to do with cam timing. Your cam timing could be off 1 tooth and your ignition timing could be right on. gNARLs.
Originally Posted by Gnarly4X
(Post 51301859)
Or your ignition timing could be off and your cam timing right on.
gNARLs.
Originally Posted by Gnarly4X
(Post 51302276)
If the t-chain jumps one tooth on the cam sprocket, the cam timing will off by about 9 degrees, not 3 degrees.
gNARLS. |
you said if the cam timing jumps (retards 9 degrees) that your ignition timing can still be on. Tell me why the distributor does not retard as well since it is attached to the cam.
the only way I can think that if the cam timing is off a tooth and the distributor (ignition timing) can still be on is if the cam was installed 1 tooth off and then the distributor was installed afterwards and timed correctly. But if the cam jumps while the engine is running I see no way that the ignition timing can not be off, since it is basically attached to the cam. |
so i dont think my timing chain should be as loose as it is...i dont remember it being that loose before
on the exhaust side of the cam sprocket..i can move the timing chain about 3/4"..... but on the top i can move it about 1/4"..and on the intake side i can't hardly move it at all LOL. everything is in time so it hasn't jumped a tooth... yes i'm sure i got the light on the right plug wire Abe..lmao i roughed up the timing mark on the crank pulley (just to make it bare metal again)..and im about to check the timing again to see what i can get... |
Did you replace the chain tensioner when you did the chain?
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yep...same time as the rebuild..about 3500 miles ago or so
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Originally Posted by camo31"10.50"
(Post 51302733)
yep...same time as the rebuild..about 3500 miles ago or so
Seems to me the tensioner is the only thing that could make the chain loose. |
well i got it from engnbldr?..i guess aftermarket lol..it'd be like $300 from the dealer..eff that lmao
im gonna throw some marker on the timing mark and see if i can see it...maybe i just can't see it lol |
stick your head a little closer to the balancer, make sure the engine is running. :D
have you tried checking it from the bottom? Maybe your timing light is broke? |
Is the tensioner operated by oil pressure? That's what i was led to believe. If the tensioner is operated by oil pressure then it would have little or no pressure at startup. Only after the oil pump spins and the system is pressurized will the slack be taken up right? Correct me if i'm wrong but i'm pretty darn sure that's how it works.
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Originally Posted by mightymouse
(Post 51302780)
Is the tensioner operated by oil pressure? That's what i was led to believe. If the tensioner is operated by oil pressure then it would have little or no pressure at startup. Only after the oil pump spins and the system is pressurized will the slack be taken up right? Correct me if i'm wrong but i'm pretty darn sure that's how it works.
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