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Old 11-01-2019, 12:56 AM   #1
SlowS98
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Default S series timing

I have a 97 S series with the DOHC engine. I suspect one of the valves may be burned (or a ring is gone), though I haven't confirmed it yet. I'd like to get it back on the road as cheaply as possible; it's a daily beater, so I don't want to spend more than absolutely necessary.

Is there a way to pull the head without removing the timing cover and re-time the car properly? I know the crank pulley has a timing mark, so could I simply remove the cam gears and then reinstall them when I put the head back on? It seems like as long as I can confirm that the crank is in the 3 o'clock position, I'm golden. Of course, if the timing chain is stretched I'll end up taking off the timing cover, anyway.

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Old 11-01-2019, 09:57 AM   #2
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Default Re: S series timing

Pretty sure you have to pull the cover to reset the tensioner

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Old 11-01-2019, 11:18 AM   #3
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Default Re: S series timing

Yes, you do have to remove the cover.

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Old 11-01-2019, 11:24 AM   #4
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Default Re: S series timing

With OTC 6685 you can hold the cam gears in place and replace the camshafts without changing the timing. I remember people making custom versions of it for far less than the $200 I see it currently going for.

Even if that tool lets the head clear the gears it'll be super amazing awesome taking off with the timing cover in place; the cover is RTV'd to the block & head and I believe there's a couple of alignment pins that combined with the cover being in place will only let the head come straight up so no chance to get leverage against the RTV.

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Old 11-01-2019, 11:35 AM   #5
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Default Re: S series timing

Quote:
Originally Posted by fetchitfido View Post
With OTC 6685 you can hold the cam gears in place and replace the camshafts without changing the timing. I remember people making custom versions of it for far less than the $200 I see it currently going for.
http://www.saturnfans.com/forums/sho...d.php?t=160333

cant tell if that thread has pics because most are blocked at work

Isn't #3 exhaust the valve that usually burns? Or is it #4? Compression test?

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Old 11-02-2019, 07:49 AM   #6
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Default Re: S series timing

Quote:
Originally Posted by SlowS98 View Post
I have a 97 S series with the DOHC engine. I suspect one of the valves may be burned (or a ring is gone), though I haven't confirmed it yet. I'd like to get it back on the road as cheaply as possible; it's a daily beater, so I don't want to spend more than absolutely necessary.

Is there a way to pull the head without removing the timing cover and re-time the car properly? I know the crank pulley has a timing mark, so could I simply remove the cam gears and then reinstall them when I put the head back on? It seems like as long as I can confirm that the crank is in the 3 o'clock position, I'm golden. Of course, if the timing chain is stretched I'll end up taking off the timing cover, anyway.
No. You have to pull the timing cover to remove the cylinder head.

If you suspect a burnt valve or dead cylinder, then you should perform a compression test.

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