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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.
My Cloyes timing chain and sprockets did the same thing in my big block which makes me suspect they are being made from inferior materials or not being heat treated correctly.
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.
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.
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*.
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....
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]
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?
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?
To the best of my knowledge, the double roller is supposed to be stronger, roll with less friction, and stretch a little less.
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.
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.
found an article on engine masters that has a cloyes engineer discussing timing sets. Wear- if there is a 1/4" of deflection, it its a good indication to replace the set. Thanks guys!
09-28-2017, 12:14 PM
Timing Chain too loose?
