Timing chains - help?
Thread Starter
Safety Car
Joined: May 2001
Posts: 3,758
Likes: 3
From: Surrey
Timing chains - help?
I was going to fit a Cloyes double roller timing chain but, on pulling the Timing cover off, I found that I've already got a duplex (double roller) chain in there (as well as about 1/2 tube of that orange gasket goo stuff :mad )!
It has about 1/4" slack side to side & a fair bit of movement in & out. I think that this is too much - am I right?
Also, the crank sprocket has the numbers "HS-289" stamped on it & the cam sprocket just has "YD" stamped on it. Anybody know what make this would be?
TIA
Paul
It has about 1/4" slack side to side & a fair bit of movement in & out. I think that this is too much - am I right?
Also, the crank sprocket has the numbers "HS-289" stamped on it & the cam sprocket just has "YD" stamped on it. Anybody know what make this would be?
TIA
Paul
Burning Brakes
Joined: Dec 2000
Posts: 1,183
Likes: 2
From: Des Moines Iowa
Re: Timing chains - help? (UKPaul)
Yep, you need to replace with new chain & sprockets. Go with Cloyes "True Double Roller", maybe around $30 to $40.
Don't know about the stampings on your crank and cam sprockets.
Don't know about the stampings on your crank and cam sprockets.
Le Mans Master
Joined: Aug 2000
Posts: 6,362
Likes: 7
From: Brazos TX
Cruise-In IV Veteran
Cruise-In V Veteran
Re: Timing chains - help? (UKPaul)
I concur, replace the chain. You may have a double row chain but it might not be a double roller. The two rows are obvious but the extra roller is on each pin. You can have double row chains and you can have double row/double roller chains. When they say true roller, they mean double roller.
Pro
Joined: Dec 2000
Posts: 531
Likes: 0
Re: Timing chains - help? (UKPaul)
A quarter inch is normal. When you install a new one it will be tight for about a month maybe less. They all stretch and wear slightly. True roller is the way to go but not worth the extra money unless you are using double or triple valve springs.
Racer
Joined: Nov 2001
Posts: 499
Likes: 0
Re: Timing chains - help? (john's '81 mouse)
Yep, you need to replace with new chain & sprockets. Go with Cloyes "True Double Roller", maybe around $30 to $40.
Don't know about the stampings on your crank and cam sprockets.
Don't know about the stampings on your crank and cam sprockets.
Thread Starter
Safety Car
Joined: May 2001
Posts: 3,758
Likes: 3
From: Surrey
Re: Timing chains - help? (bigvette1)
Thanks for all the input. I use a lot of duplex & triplex (3 row) chains in other applications &, as mentioned, they always loosen off in the 1st few hundred miles. The trick is knowing how much slack is normal & how much is excessive. As pointed out, I'll just buy a new one for peace of mind.
:cheers:
:cheers:
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