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AU VCT sprocket which mark? 

 

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 Post subject: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 5:02 pm 
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Hey guys, just checking. I have an AU VCT head on EF block. The VCT cam sprocket has both an arrow and a line on it. Which one is the timimg maak? I assume it's the line? Should the front or rear cam lobes be facing up when the engine is at TDC? Thankyou

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 5:04 pm 
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from memory its the dot, and the lobs should be up/ valves closed
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 5:23 pm 
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Hey thanks, yeah, the last one I had it was a dot, you're right. But this one has an arrow & a line instead of the dot!

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 5:30 pm 
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at TDC the lobes of the cam at the front of the head are pointing down and the lobes at the rear are pointing up

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 5:59 pm 
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on tdc compression stroke cyl 1 cam lobes should be facing up as the valves will need to be closed to be compression stroke
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 6:08 pm 
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TROYMAN wrote:
on tdc compression stroke cyl 1 cam lobes should be facing up as the valves will need to be closed to be compression stroke


Excuse my amature sklls, but if the cam lobes are pointing up does'nt that mean valves are open? So when balancer mark is lined up with timing cover mark and cam line/dowel is a few mm above inlet head face cam lobes on no1 cylinder should be facing down?

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 7:18 pm 
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yea your right, sorry,, :oops: derrrrrr.....lol

im thinking of a different engine...lol

anyway, aslong as the valves are closed on cyl 1@ tdc your in the ball park...
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sat Dec 08, 2012 11:11 pm 
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TROYMAN wrote:
yea your right, sorry,, :oops: derrrrrr.....lol

im thinking of a different engine...lol

anyway, aslong as the valves are closed on cyl 1@ tdc your in the ball park...


aplogy accepted, lol

I think I might have damaged valve/s. The timing is right now, but I made a careless mistake before & tried to start the car with incorrect timing. So now when I try to start the car it spins, but has a weird sound (like a vacume cleaner and a faint popping from the exhast every so often. It only spins from the starter motor, but the engine won't acually fire..Is there any way to tell without lifting the head?

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 6:46 am 
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Best way is to do a compession test on each cylinder. If you can't get a compression tester, pull your rocker cover and check each rocker when the lobe is down, valve closed and see if you have excessive play in the rocker, should be none,
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 11:32 am 
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Thanks for your help. Here's how much play there is on a few springs with the valve closed..am i dealing with a crisis? lol
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 12:23 pm 
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Ok, sopretty sure I have to face I have busted the valve/s. The engine whirls over, but it sounds like it has no comp.
Does anyone in victoria do drive in/drive out BA/f/G engine conversions for E series. This is a serious question, as I have spent alot on my EF & want to keep it a long time.Thanks for the help so far guys.

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 12:51 pm 
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Looks like you have bent a valve. Are others like this or only this one.
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 12:55 pm 
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Looks like you have bent a valve. Are others like this or only this one.
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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 2:56 pm 
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The rear one (firewall) on the inlet side is the same. All the otheres have no where near as much of a gap. I'll pull the head, not happy Jan! Thanks for helping.

 

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 Post subject: Re: AU VCT sprocket which mark?
Posted: Sun Dec 09, 2012 4:22 pm 
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Not looking good mate.. :( . Best of luck with it. Is the head stock or worked?
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