What is the position of the AEM pulleys on the valve cams of the 4G63

[Xray]

Please, can anyone help me?

What is the position of the AEM pulleys on the valve cams of the 4G63

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[USMCGSX]

The degree marks should be at the 12 o'clock position.

 

[Mello]

The cam gears install the same as OEM.

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If your timing belt mechanical timing is correct then you are not at TDC & your timing marks for the timing belt will not be lined up correctly. Both the dowel pins (barely peeking around the flat washers holding your cam gears) that locate the cam gears during install should be pointing up (12 o'clock) when TDC & doing the timing belt.

Here's a picture of my car that is almost (about 2 teeth past) TDC.

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[Xray]

Dear Mr. Mello

Your information is very accurate.
Congratulations.

We mount the TDC, as shown in the photo, so the engine does not start.

Lucky you didn't run over the valves on the piston

We'll have to do it all over again, with your accurate information we'll make it right.

I don't understand why the timing marks Intake are lined up one on top of the tooth, and
In Exahust are lined up one valley of the tooth ?

Do you use the OEM CAMS?
What is the purpose set 4° delayed on intake?
And 1° delayed on exahust?

Thank you very much

 

[steve]

I don't understand why the timing marks Intake are lined up one on top of the tooth and In Exhaust are lined up one valley of the tooth?

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The OEM Sprockets on most of the years were used for both camshafts, but the exhaust camshaft is advanced a little more than 3 degrees, where the intake cam is at 0. The timing marks on the sprocket reflect this. The mark that would be on the inside when on the intake is at 270* and the mark that would be on the inside of the exhaust is at 86*55'.

 

[Xray]

Dear Mr. Steve

Yes, now i understand
Mass production issues.

You have beautiful cars
congratulations

Thank you very much

 

[CrackedDSM]

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The OEM Sprockets on most of the years were used for both camshafts, but the exhaust camshaft is advanced a little more than 3 degrees, where the intake cam is at 0. The timing marks on the sprocket reflect this. The mark that would be on the inside when on the intake is at 270* and the mark that would be on the inside of the exhaust is at 86*55'.

So if we have aem trutime gears installed should we retard them like this picture shows? 1* for exhaust and 3* for intake?

 

[Mello]

If you set all the marks on the AEM gears so they are "zeroed" then they would be the same as OEM cam gear marks.

 

[steve]

If you set all the marks on the AEM gears so they are "zeroed" then they would be the same as OEM cam gear marks.

They should be, if they aren't you have a problem. (there have been bad aftermarket sprockets in the past)

So if we have aem trutime gears installed should we retard them like this picture shows? 1* for exhaust and 3* for intake?

Why?

 

[Mello]

Do you use the OEM CAMS?
What is the purpose set 4° delayed on intake?
And 1° delayed on exahust?

Cams are 272's, heads been decked, & I wanted a little less overlap.

 

[Xray]

"Cams are 272's, heads been decked, & I wanted a little less overlap."

Very good


We use Crower 64413-2 CAMs,

however we are having some issues with lifters,
we drain the oil,
but it loads again and keeps some valves open,
have you had these issues?

Thanks

 

[1990TSIAWDTALON]

Always DOWELS UP! It does not matter what gears, on the 4g63, the dowel holes/pins always go up at TDC when doing a timing job.
Are you "bleeding" your lifters with a paper clip or needle through the oiling hole in the middle before installing? They should always be left bled, they will pump up as soon as the motor sees oil pressure. There is a thread HERE that may be helpful to you.
Also, welcome to the forum. If it is DSM related, you can find many answers or post questions for the group to try and help you out. Glad to have another member from out of the States. That means the forum gets exposure and that is GOOD!
Marty

 

[Xray]

Dear Mr. Marty

Yes, I'm bleeding the Lifters, but another way,
I'm closing very slowly in the vise,
sometimes it's necessary to open and close several times to
remove all the oil and keep the spring pressure only.

Is this procedure correct?

Thank you for the welcome

Thank you very much

 

[1990TSIAWDTALON]

That is the procedure that I use, yes. I pump them up then I stick a paper clip into the middle of the lifter to press the check valve down and bleed ALL of the oil out so they are soft and spongy.