Idler pulley... [Forums - C4 Technical]

C4 Technical > Idler pulley...
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Schrade	Idler pulley...	#1
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Anyone ever broken down their idler pulley? Got snappics? Gonna' pull mine tomorrow here...
	Posted on: 2015/4/24 2:34
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LD85	Re: Idler pulley...	#2
Master Guru Indianapolis, Indiana 784 Posts Member since: 2005/9/16 0:00	I have, you can buy a new bearing and repair it that way by taking the dimensions of the stock bearing and buying one online or possibly McMAster Carr. I got one at a local distributor here in INDY
	Posted on: 2015/4/24 13:24
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bogus	Re: Idler pulley...	#3
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	remember... some of the pulleys are plastic. over time, they do weaken. I would get a Goodyear replacement. IIRC, the last one I got was made in the USA and had an NTN bearing in it.
	Posted on: 2015/4/24 16:34
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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BrianCunningham	Re: Idler pulley...	#4
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	Last time I bought one I had to go to a dealer
	Posted on: 2015/4/24 17:13
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Schrade	Re: Idler pulley...	#5
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Thanks there... First thought was re-packing bearings. Haven't got at it yet; are they sealed?
	Posted on: 2015/4/24 18:12
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LD85	Re: Idler pulley...	#6
Master Guru Indianapolis, Indiana 784 Posts Member since: 2005/9/16 0:00	yes it is sealed bearing. http://shop.advanceautoparts.com/web/ ... =6538&searchedFrom=header
	Posted on: 2015/4/24 22:40
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Matatk	Re: Idler pulley...	#7
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Check the whole unit, though. It's not just the bearings that go bad, the tension spring goes bad as well. http://zr1.net/forum/showthread.php?t=21365
	Posted on: 2015/4/25 11:43
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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Matatk	Re: Idler pulley...	#8
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	http://www.zr1.net/forum/showthread.php?t=21756
	Posted on: 2015/4/25 11:51
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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Schrade	Re: Idler pulley...	#9
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Thanks there Matt... Got the tensioner off. Hard part was pulling hoses / coolant crossover. Just put them on clean with grease film a year ago. Pulley on tensioner feels good. But that internal spring HAS to be the culprit. I sprayed it with WD-40 several times before startup, and only once was it quiet. Granted, it is a tight shot with the lube... But this thing only has 37K. ???
	Posted on: 2015/4/25 21:22
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Matatk	Re: Idler pulley...	#10
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Miles might be low, but years are not. It is said that a tensioned spring loses tension over time.
	Posted on: 2015/4/26 0:54
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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LD85	Re: Idler pulley...	#11
Master Guru Indianapolis, Indiana 784 Posts Member since: 2005/9/16 0:00	Quote: Matatk wrote: Miles might be low, but years are not. It is said that a tensioned spring loses tension over time. That's what my wife tells Me!
	Posted on: 2015/4/26 11:24
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Matatk	Re: Idler pulley...	#12
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Quote: LD85 wrote: Quote: Matatk wrote: Miles might be low, but years are not. It is said that a tensioned spring loses tension over time. That's what my wife tells Me!
	Posted on: 2015/4/26 11:36
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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CentralCoaster	Re: Idler pulley...	#13
Senior Guru San Diego, CA 9454 Posts Member since: 2007/10/28 0:00	Btdt. Changed bearing and it still squeaked, tried douching the spring, then finally replaced the whole thing. I found wet lubes would make it worse? Maybe due to attracting dust? Honestly brake cleaner or gasoline would be a better temporary fix. But the smog pump is also a good suspect for belt noise. I just pulled that apart too. I'll post a thread soon on how easy it is to screw it up.
	Posted on: 2015/4/27 5:38
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bogus	Re: Idler pulley...	#14
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	the tensioner is weird... it's a coil spring, but has a plastic/nylon/composite of some sort pad. I think that pad wears out, too, causing noise. I am not a fan of messing with the tensioner.
	Posted on: 2015/4/27 17:41
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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Schrade	Re: Idler pulley...	#15
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Well - not the best news from Marc Haibeck... He said my pulley (from L-98), looked "ok", before he re-fitted new parts. So I read that L-98 parts could be fitted to my tensioner. When did it get the L-98 parts? It still has only 37K on it, so this is the third??? And WD-40, one pulley @ a time, doesn't really work for diagnostic, for start-up chirping, since they're all sealed. He said check A/C pulley next. Check it? I tried FIRST using a hose, but could not isolate. It needs a FUNNEL on the end, but a funnel ain't got much real estate to work around in there. IF IT IS A/C, wouldn't turning A/C on and off, WHILE IT'S CHIRPING, have an effect??? These pulleys are pretty much the same for all C4's, no?
	Posted on: 2015/5/7 22:55
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Matatk	Re: Idler pulley...	#16
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Try a mechanic's stethoscope on the bolt holding the pulley.
	Posted on: 2015/5/8 12:14
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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Schrade	Re: Idler pulley...	#17
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Quote: Matatk wrote: Try a mechanic's stethoscope on the bolt holding the pulley. Probably the best idea. But about the fingers... Can ya' SHOW me here Matt??? Somethin' about not havin' to pull a shoe, to count to 10...................
	Posted on: 2015/5/9 5:37
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Matatk	Re: Idler pulley...	#18
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Chuck, I don't know how far the pulley is buried in the engine bay. But a mechanic's stethoscope has a long metal rod that you place against that area you are trying to listen to. Shouldn't have to stuff any fingers down there.
	Posted on: 2015/5/9 13:20
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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Schrade	Re: Idler pulley...	#19
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Great - another tool... If the new tensioner doesn't get it, I'll probably be there. Anybody got one I can BORROW? I'll pay full cost + postage up front. Cheap OR expensive, I'm runnin' out of space for once-used tools, that you have to navigate through to get to the rest of the stuff... And gun tools / armorer's hardware is even WORSE!
	Posted on: 2015/5/9 18:46
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Matatk	Re: Idler pulley...	#20
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Chuck...there is no such thing as too many tools! I just had to buy two new tools for my PS lines.... BTW, the cheapie HF mechanic's stethoscope is $4 which is less than postage. You could use it and give it away once done.
	Posted on: 2015/5/10 3:40
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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Schrade	Re: Idler pulley...	#21
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Done THAT more than a few times there Matt... Quote: Matatk wrote: Chuck...there is no such thing as too many tools! I just had to buy two new tools for my PS lines.... BTW, the cheapie HF mechanic's stethoscope is $4 which is less than postage. You could use it and give it away once done. Anyway; start-up on re-install. Cleaned up some parts, and set-up cams, lights, etc...
	Posted on: 2015/5/13 16:30
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Schrade	Re: Idler pulley...	#22
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	We ain't even gettin' close to the tensioner yet. (does anyone have intake ducting hardware painted? Sort of like Samco hoses? ) Pull A/F housing: Vacuum debris: Wash: I got 2 K&N's for both other vehicles, but not this one...
	Posted on: 2015/5/13 18:16
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BrianCunningham	Re: Idler pulley...	#23
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	I like how the rev limiter was set by the accessories and not the engine on the LT5s
	Posted on: 2015/5/13 18:38
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Schrade	Re: Idler pulley...	#24
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Quote: BrianCunningham wrote: I like how the rev limiter was set by the accessories and not the engine on the LT5s Didn't know that there BC! NOR did I know that the Vigilante torque convertor is marketed for 6k RPM. But how is Accessory the limiter on this machine here? How does that work? ( I really DON'T know much... ! )
	Posted on: 2015/5/13 19:50
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Schrade	Re: Idler pulley...	#25
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	More cleanup. Just FUN......
	Posted on: 2015/5/13 20:41
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Schrade	Re: Idler pulley...	#26
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Neighbor just ran his lawnmower through my front yard!!! Thanks! But the wind is wrong!!!!!!!!!!!! Came back outside, and dust EVERYwhere! ... and stirred up the mosquitoes! Scram F*&^er! Blood Bank is down the street.
	Posted on: 2015/5/13 20:58
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BrianCunningham	Re: Idler pulley...	#27
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	The accessory belt won't stay on, overspeed the alternator Some have had them to 8,000rpm http://zr1.net/forum/showthread.php?t=1250&page=8
	Posted on: 2015/5/13 21:16
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Schrade	Re: Idler pulley...	#28
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Thanks there Brian... More cleaning here... never had a K&N clean so POORLY. 4 times in the bucket, about 2.5 qts of soap total - til the filter oil on top of the water 'broke'.
	Posted on: 2015/5/13 21:44
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Schrade	Re: Idler pulley...	#29
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Actually getting FURTHER from the new tensioner here... Pulling the AIR pump. Electrical, so no new belt drive configuration.
	Posted on: 2015/5/13 23:43
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Schrade	Re: Idler pulley...	#30
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	I got lucky. DOin' sorta' what I preach most AGAINST - PLUG N PRAY diagnostics. Put in the re-worked tensioner (after doin' some cleanup and paint), and then spun it up. QUIET - no chirp. In fact, it spun up immediately, something it rarely does, which is strange because I did nothing else (which seems to be a common problem after so many years; even lower mile, well tuned motors). But second turn, it took a few seconds... Now time to try and learn coding....... I took a few more shots along the way: AIR pump out: and snorkel re-coat TB Extension
	Posted on: 2015/5/18 14:30 Edited by Schrade on 2015/5/18 14:45:53
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Schrade	Re: Idler pulley...	#31
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Flat Black on A/F lid Red on A/F housing (flame suit on) Grease on pipes
	Posted on: 2015/5/18 14:52
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Schrade	Re: Idler pulley...	#32
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Filter coolant juice re-fill shave in the morning under the chin, and don't cut your finger
	Posted on: 2015/5/18 14:59
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Schrade	Re: Idler pulley...	#33
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Grease on threads set the TB Extension di-electric on connectors
	Posted on: 2015/5/18 15:07
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Schrade	Re: Idler pulley...	#34
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Done.
	Posted on: 2015/5/18 15:08
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TommyT-Bone	Re: Idler pulley...	#35
Chair-man of the bored Homestead USA 33760 Posts Member since: 2007/12/10 0:00	Sharp!
	Posted on: 2015/5/18 16:21

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BrianCunningham	Re: Idler pulley...	#36
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	Nice!
	Posted on: 2015/5/18 17:13
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Schrade	Re: Idler pulley...	#37
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	THanks. Just a TUNED motor. Don't think it even has the power that yours does Brian...
	Posted on: 2015/5/18 20:46
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CentralCoaster	Re: Idler pulley...	#38
Senior Guru San Diego, CA 9454 Posts Member since: 2007/10/28 0:00	Looks good, but I'd dump the K&N. They pass way too much dirt. I think because it's impossible to evenly coat the pleats by spraying it. The peaks will always be overloaded and the sides too little. Plus on the early cars it's hard to get a good seal on the hard poly surround with only 2 bolts on the flimsy intake. I still run one though because the paper one is too tall and blocks my cold air duct.
	Posted on: 2015/5/19 20:30
	_________________ 1985 Z51, ZF6
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Schrade	Re: Idler pulley...	#39
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Missed this there CC... Never known anyone who didn't care for K&N... Only rap is TOO much oil - (for MAF Filament) I go VERY LIGHT on it. And directions DO say let it sit for ? hrs before install. I do them for all my stuff. Obsessive for clean - I vacuum house A/C filter every no more than 3 days. And if you've seen my wrenchin' posts, cleaning bolt threads with wire brush, AND bolt holes too, you'll see why K&N (or Spectre / wannabe K & N). Paper probably DOES flow better, I'm guessin'. Anyone??? Quote: CentralCoaster wrote: Looks good, but I'd dump the K&N. They pass way too much dirt. I think because it's impossible to evenly coat the pleats by spraying it. The peaks will always be overloaded and the sides too little. Plus on the early cars it's hard to get a good seal on the hard poly surround with only 2 bolts on the flimsy intake. I still run one though because the paper one is too tall and blocks my cold air duct.
	Posted on: 2015/6/3 23:50
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