deadeyejedi

with the help of several members im well on my way to reassembling my engine .was wondering what anyone thinks of the magnum double roller timing chain offered by advance auto parts ?they have one locally i could pick up ,or should i hold out and order a better quality one ? thanks

Ed Carpenter

If your not doing major modifications. Just get a stock replacement. It'll run another 40 to 50 years.

deadeyejedi

at this time everything is stock

MDchanic

Try to avoid Made In China - there have been reports of the keyways being a number of degrees out of time on the cheapest models.

A decently made Cloyes unit can't hurt, but so long as you degree it after you assemble it, you'll know it's okay.

Also, be sure to photograph the chain in place before you put the cover on, because at some point, you'll suddenly wonder if you lined it up right.

- Eric

joe_padavano

Be careful that many double roller chains will not clear the actuator arm on the stock mechanical fuel pump.

olds 307 and 403

My Cloyes Street roller cleared fine and is supposed to be accurate. I never degreed but should have. On a stock build with quality parts, not super critical.

deadeyejedi

I went with the comp cam magnum from advance have all the rest of the parts going to start after work . I'll be shocked if everything fits I asked to different parts stores for a frost plug for my heads and they told me three different sizes

deadeyejedi

well its game over for a few days the timing chain set was the wrong one and my belly pan looked like someone stomped on it .guess ill order online .

Octania

three bolt holes in the cam sprocket by any chance?
[the wrong unit, that is]

You should snap a photo of the timign set just before putting the cover on

don't forget the oil slinger

You SHOULD run the dial indicator and degree wheel just as a matter of good practice with unknown parts. Many folks do not and get by OK

I advise placing motor at TDC #1 firing- both dots at 12:00 I beleve- then marking cam gear where dist'r enters, with a paint pen, so later it's really easy to verify #1 vs #6 TDC

joe_padavano

deadeyejedi

yes three bolt holes in the cam sprocket .and all good suggestions.ive read several post contradicting where the timing marks should be positioned.mine is definitely 12 oclock on both gears .number one cylinder is at tdc of the compression stroke and rotor is pointing to number one cylinder.

cutlassefi

Three bolt holes in the cam sprocket is a Chevy.
Run the hell away from the Magnum timing sets, they're junk. Buy a cloyes, preferably a 9 keyway. They're the most accurate for the money.
And some double rollers push the oil slinger up against the front cover. Don't forget to check that too.

coppercutlass

I just degreed a cam with a magnum timing set and i had to install it 4 degrees advanced to get it close and it was still a degree off on the icl. I degreed a lunati cam last year thats whats in my car now and i bought a pro gear timing set from rocket racing and was very pleased. Price was very fair at 70 bucks if i remember right.