Camshaft timing without locking tool?

[bluetz]

I was wondering is any engine gurus out there can help me out. Im replacing the intake camshaft and nicked the timing. Totally forgot to mark the cams before removing. Is the exhaust lobe of cylinder #3 timed exactly the same as the intake lobe of cylinder #1? This is when cylinders #1 and #3 are at TDC.

So based off my knowledge of engine theory, when piston #1 is TDC on intake stroke, the #3 piston is on BDC on exhaust stroke. My questions is: when the intake camshaft is starting to press the valve however many degrees before TDC on cylinder #1, is the exhaust valve on lobe on cylinder #3 pressing the valve down exactly at the same time? Or should it be one tooth on the sprocket back, or forward?

[Theiceman]

I was wondering is any engine gurus out there can help me out. Im replacing the intake camshaft and nicked the timing. Totally forgot to mark the cams before removing. Is the exhaust lobe of cylinder #3 timed exactly the same as the intake lobe of cylinder #1? This is when cylinders #1 and #3 are at TDC.

see this thread !!

I seem to be getting Pmed a lot about it lately.

post 65 is where the juicy stuff starts.

https://www.audizine.com/forum/showt...-all-she-wrote

[bluetz]

So 20 teeth from the intake cam to the exhaust? If that is the case then it looks like when the cam lobe hits the #1 cyl intake valve the cyl #3 exhaust lobe is slightly delayed approximately 1 tooth.

[Theiceman]

look at the pics , and the cam lobes on cylinder 4 ( they need to be perfectly symmetrical ) . I'm not going to say 20 teeth as some count the first but not the last etc. , I'm going to say look at the picture and mark your chain and cams exactly the same.
The cams in that thread are bang on so use those as a guide , the lobes at the back of the engine ( cyl 4 ) are used for ref , not cyl 3.

also this is of course assuming cyl 1/4 are at top dead centre and timing mark lines up at front of timing cover.

[Brad460]

I was wondering is any engine gurus out there can help me out. Im replacing the intake camshaft and nicked the timing. Totally forgot to mark the cams before removing. Is the exhaust lobe of cylinder #3 timed exactly the same as the intake lobe of cylinder #1? This is when cylinders #1 and #3 are at TDC.

So based off my knowledge of engine theory, when piston #1 is TDC on intake stroke, the #3 piston is on BDC on exhaust stroke. My questions is: when the intake camshaft is starting to press the valve however many degrees before TDC on cylinder #1, is the exhaust valve on lobe on cylinder #3 pressing the valve down exactly at the same time? Or should it be one tooth on the sprocket back, or forward?

Spend $20 for a service manual...that way you have all the torque specs too. Not say guys on here don’t know their stuff, but this way you have the correct way documented in front of you.

I have read enough posts on here and other sites where guys clearly don’t know what they are doing, and/or left important bolts loose and such..

[bluetz]

I have a service manual but it is rather vague on timing. It says just insert the locking tool to align the camshafts.

[bluetz]

I think i have the timing correct because the exhaust valve opens at around 100* BTDC and closes right around TDC, and the intake opens 14* ATDC. This is for cyl #1.

Is there supposed to be any valve overlap? If so I may have to adjust my intake cam 1 tooth forward.

[Theiceman]

I think i have the timing correct because the exhaust valve opens at around 100* BTDC and closes right around TDC, and the intake opens 14* ATDC. This is for cyl #1.

Is there supposed to be any valve overlap? If so I may have to adjust my intake cam 1 tooth forward.

I just told you twice EXACTLY how to set the timing for the cams.

I'm out.

[bluetz]

Im not going to go off some picture counting the links. Or looking at alignment. No need for the arrogance i just want to be 100% sure by looking at the valve timing. The head is off the car so i know exactly when the valves open and close.

So the cams have to be symmetrical when the cam gear is at TDC? In that case there is no valve overlap. I thought some valve overlap was necessary hence my confusions about the timing. I know im close i just dont know if i should leave the cam timing as i have it now or move the intake cam 1 tooth forward.

[Theiceman]

no arrogance, just trying to tell you how to do it exactly right and you are fighting it ...

so lets do it this way ...

..do it your way, if then when you are done the links and cams aren't exactly like in the pics I showed , then you did it wrong, do it again ...

[funkypterodacty]

info you need starts at 30:10

[Denio24]

Im not going to go off some picture counting the links. Or looking at alignment. No need for the arrogance i just want to be 100% sure by looking at the valve timing. The head is off the car so i know exactly when the valves open and close.

So the cams have to be symmetrical when the cam gear is at TDC? In that case there is no valve overlap. I thought some valve overlap was necessary hence my confusions about the timing. I know im close i just dont know if i should leave the cam timing as i have it now or move the intake cam 1 tooth forward.

LoL. This is the first time i have seen someone timing the cams off when the valves open and close. Its just plain funny! For your way, there should be absolutely NO OVERLAP. Meaning, when the exh. cam is at the TDC mark both valves should be closed. If one valve starts opening before the other hasnt fully closed means you have timed it incorrectly.

Other than that, there should be 20 spaces in between the links counting the first and last mark where the sprockets go in the chain space.

The next time you do something like this make marks on the cams and head to know how to align.

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