Timing Chain too loose?
#1
Burning Brakes
Thread Starter
Timing Chain too loose?
This is on my 383. It is a Cloyes set and has approx. 1500 miles. It seemed looser than I was expecting. To be fair, I have only seen timing chaings when there were being replaced due to excessive wear. I am not familiar with what a low use set should look like. Thanks.
#3
Le Mans Master
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What's the history of the block? Was it ever aligned-bored? That could move the crank closer to the cam centerline but not by that much.
#6
Drifting
I just took timing cover off my 383 with same chain last night but didn't inspect chain. Brand new with now 5000K.
We'll look tonight and get back to you tomorrow.....
could use that crank turner bolt thing you got there! Nice
We'll look tonight and get back to you tomorrow.....
could use that crank turner bolt thing you got there! Nice
Last edited by Surfer69; 09-28-2017 at 03:39 PM.
#7
Le Mans Master
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Are you sure that's a Cloyes? It looks like a billet material and I thought Cloyes were cast iron? And I don't remember Cloyes having 8-10 holes in the cam sprocket, not that it matters. The teeth look well worn for that mileage and that's a little more slop than I would care for. The real question is; do I want to spend another $50 and 10 minutes labor? Maybe check into a better brand that is designed for aligned bored.
Last edited by HeadsU.P.; 09-28-2017 at 04:43 PM.
#8
check this link on how to test slack in the chain by watching distributor rotation
http://www.misterfixit.com/chanslop.htm
http://www.misterfixit.com/chanslop.htm
#9
Pro
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I used a #2110 Competition Cams Magnum timing chain/sprocket set and later found out they buy all of their timing chain/sprocket sets from Cloyes. I put a little dot of "White Out" onto the marks to make darned sure I used the right "straight up" mark that my 286H cam recommended.
#10
Team Owner
I installed a Cloyes "True Roller" in a '93 Caprice that we used to own, and there was damned near 'zero' slack in it. In fact, I put a timing light on the car after the chain replacement, and the timing had moved by 3*.
#11
Dr. Detroit
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That is a Rollmaster timing set by Romac U.S.A.
Here is something simple you can do......buy another Cloyes set, the True Roller set and install it.......record how tight that chain is....this will rule out the line hone question. If it is tight....put it together and go! If not...then you need the .005 under set that Cloyes makes......
FYI...Cloyes does make a billet set...it is the Hex-a-Just...and about $140 now-a-days....
Jebby
Here is something simple you can do......buy another Cloyes set, the True Roller set and install it.......record how tight that chain is....this will rule out the line hone question. If it is tight....put it together and go! If not...then you need the .005 under set that Cloyes makes......
FYI...Cloyes does make a billet set...it is the Hex-a-Just...and about $140 now-a-days....
Jebby
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Street Rat (09-29-2017)
#13
Burning Brakes
Thread Starter
Thanks for all the feedback guys. Yeah to owning motorcycles. All the cam chains had tensioners! I took a look at the current chain because I want to advance the cam. After seeing the slop I thought maybe the cam was retarded.
QUOTE=Pop Chevy;1595664021]You never owned a motorcycle ? Even a good chain will stretch some when new. I would not worry about it.[/QUOTE]
QUOTE=Pop Chevy;1595664021]You never owned a motorcycle ? Even a good chain will stretch some when new. I would not worry about it.[/QUOTE]
#14
Team Owner
I agree..............sort of. The OP is picturing an almost new new chain. Think about what it will look like, after several thousand miles.
Last edited by leadfoot4; 09-29-2017 at 08:01 AM.
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persuader (09-29-2017)
#15
Burning Brakes
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2017 C3 of Year Finalist
OK! Regarding the timing chains and variety of them. I checked at Rock auto and they have chains from $15 to $150.
Does buying double roller chain hlep with the tension? Is it plausible to use it on a standard sb engine?
Does buying double roller chain hlep with the tension? Is it plausible to use it on a standard sb engine?
Last edited by Primoz; 09-29-2017 at 08:16 AM.
#16
Team Owner
To the best of my knowledge, the double roller is supposed to be stronger, roll with less friction, and stretch a little less.
#17
I had a problem with noise from the chain on my BBC (has a thread on here 'hydraulic roller cam noise' I think?) It was leaving lots of marks on the chamfered part of the teeth similar to yours. Turns out the block had been line honed and the chain was too loose. Bought a .005 under set from Cloyes and problem fixed. It's still tight. I'm not an engine builder but the shops around here recommended cloyes sets as the high quality choice. I don't think it's the set that is the issue, it's possibly the line hone that put the crank higher in the block. That's my experience anyway. Hope it helps.
#19
Le Mans Master
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Ooof, I'm late here but yes alinghoning and alingboring moves the crank closer to the cam. Its surprising how many owners/builders are unaware of this. And how few timing set mfr's offer timing sets to correct for this let alone gear drive vendors. Not trying to flame the OP by any-means as this problem goes unnoticed by most and glad to read he found it. David Vizard writes the alinghoning/boring isn't needed for many street builds and a simple rotation teat by hand can validate a good crank alignment.
I enjoyed reading Smokey Yunicks (RIP) "Power Secrets" where he or his shop would use 2 piece gear drives that required reverse direction ground camshafts. And then the timing set would be ground down to correct fit by using a grinding compound while turning them engaged for a precise fit. Smokey did say alinghone/boring is necessary for any serious performance effort - race team.
Good catch 73.
I enjoyed reading Smokey Yunicks (RIP) "Power Secrets" where he or his shop would use 2 piece gear drives that required reverse direction ground camshafts. And then the timing set would be ground down to correct fit by using a grinding compound while turning them engaged for a precise fit. Smokey did say alinghone/boring is necessary for any serious performance effort - race team.
Good catch 73.