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Possible crank to lower sprocket issue. #908355 01/18/11 10:50 PM 01/18/11 10:50 PM
Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif. P PUNK OP top fuel
PUNK OP top fuel P Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif.	Has anyone ever seen a crank that had the shoulder of the snout in which the lower crank sprocket backs up against be machined too much? In other words, I have an engine over here that has a crank that seems to be allowing the lower crank sprocket to slide on too far which is causing the timing chain to not be in perfect alignment. I tried another timing gear set and found it to be the same result. I guess I could shim the lower sprocket out some to fix this condition. Has anyone else seen this issue? This is a first for me. Also a first with this particular brand crankshaft also. 10.53 @ 125mph. 1.37 60 foot. Caltracs and Monoleafs, AFCO shocks. Heads by INDIO MOTOR MACHINE; IMM. CP Pistons, PC Carbs.

Re: Possible crank to lower sprocket issue. [Re: PUNK] #908356 01/22/11 07:29 PM 01/22/11 07:29 PM
Joined: Oct 2005 Posts: 8,874 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,874 Ontario, Canada	My guess is you left out the oil slinger and that's the difference !!

Re: Possible crank to lower sprocket issue. [Re: Stanton] #908357 01/22/11 08:19 PM 01/22/11 08:19 PM
Joined: Feb 2005 Posts: 2,679 owt west Thread Ender1 master
Thread Ender1 master Joined: Feb 2005 Posts: 2,679 owt west	Quote: My guess is you left out the oil slinger and that's the difference !! Wrong!!!! tht goes after the gear is installed 10-4

Re: Possible crank to lower sprocket issue. [Re: Thread Ender1] #908358 01/22/11 09:46 PM 01/22/11 09:46 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Quote: Wrong!!!! tht goes after the gear is installed 10-4 You could of said "if i recall the slinger goes on after the gear' , now would'nt that be a better way making you're point? All friends here i hope. ...........................................anyhow , i usually 'sling' the slinger in the corner of workshop & forget about it , so i don't remmember which way it goes on.

Re: Possible crank to lower sprocket issue. [Re: 602heavy] #908359 01/22/11 10:12 PM 01/22/11 10:12 PM
Joined: Feb 2005 Posts: 2,679 owt west Thread Ender1 master
Thread Ender1 master Joined: Feb 2005 Posts: 2,679 owt west	Quote: Quote: Wrong!!!! tht goes after the gear is installed 10-4 You could of said "if i recall the slinger goes on after the gear' , now would'nt that be a better way making you're point? All friends here i hope. ...........................................anyhow , i usually 'sling' the slinger in the corner of workshop & forget about it , so i don't remmember which way it goes on. What are you type "babbling" about? I don't need to state i recall anything about oil slingers. I know how they install unlike you, right? So pay attention before you type nonscense. Ok friend

Re: Possible crank to lower sprocket issue. [Re: Thread Ender1] #908360 01/22/11 10:26 PM 01/22/11 10:26 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Quote: Quote: Quote: Wrong!!!! tht goes after the gear is installed 10-4 You could of said "if i recall the slinger goes on after the gear' , now would'nt that be a better way making you're point? All friends here i hope. ...........................................anyhow , i usually 'sling' the slinger in the corner of workshop & forget about it , so i don't remmember which way it goes on. What are you type "babbling" about? I don't need to state i recall anything about oil slingers. I know how they install unlike you, right? So pay attention before you type nonscense. Ok friend Ok point taken. ..................'never confuse politeness as a sign of weakness'

Re: Possible crank to lower sprocket issue. [Re: 602heavy] #908361 01/22/11 10:32 PM 01/22/11 10:32 PM
Joined: Feb 2005 Posts: 2,679 owt west Thread Ender1 master
Thread Ender1 master Joined: Feb 2005 Posts: 2,679 owt west	Quote: Quote: Quote: Quote: Wrong!!!! tht goes after the gear is installed 10-4 You could of said "if i recall the slinger goes on after the gear' , now would'nt that be a better way making you're point? All friends here i hope. ...........................................anyhow , i usually 'sling' the slinger in the corner of workshop & forget about it , so i don't remmember which way it goes on. What are you type "babbling" about? I don't need to state i recall anything about oil slingers. I know how they install unlike you, right? So pay attention before you type nonscense. Ok friend Ok point taken. ..................'never confuse politeness as a sign of weakness' Mmm ok.....what an absolute tosser you are? carry on.

Re: Possible crank to lower sprocket issue. [Re: Thread Ender1] #908362 01/22/11 10:34 PM 01/22/11 10:34 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Sounds like you just had one. Tosser............

Re: Possible crank to lower sprocket issue. [Re: 602heavy] #908363 01/22/11 10:35 PM 01/22/11 10:35 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	The crank gear may float some on the key and crank snout some in some cases (stock stuff) It will follow the cam. Were talking a movement of very little hear, but will move. How does the alignment look as far as the cam gear and crank gear is concerned? It usually wont go much farther back than the cam gear is, and most flat tappet cams will walk a hair, but mostly the spinning of the tappet will push the cam towards the back of the block, and the face of the block and back of the cam gear crown will provide the thrust and wear. Is this a stock crank or after market? I guess a aftermarket crank could be machined wrong. Has this crank been used prior? [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Possible crank to lower sprocket issue. [Re: Bob_Coomer] #908364 01/22/11 10:50 PM 01/22/11 10:50 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	Sorry Bob but the balancer seats hard up to the sprocket and slinger if used, if it didn't the balancer would not work. I haven't heard of your problem but if you have tried a couple of sprockets and they are in to far then it's the crank. it's ok to butt heads, just don't do it with a butthead

Re: Possible crank to lower sprocket issue. [Re: Bob_Coomer] #908365 01/22/11 10:52 PM 01/22/11 10:52 PM
Joined: Jun 2004 Posts: 6,780 Alabama Mopar-Al master
Mopar-Al master Joined: Jun 2004 Posts: 6,780 Alabama	Did you spin the tc set up with the dist drive installed? Is it possible you pushed the rear cam plug to far in? Never saw that problem before. tight cam bearing not letting cam go back all the way? these are things I would check if you haven't already.

Re: Possible crank to lower sprocket issue. [Re: rowin4] #908366 01/22/11 10:56 PM 01/22/11 10:56 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Have you checked crank end float?

Re: Possible crank to lower sprocket issue. [Re: Mopar-Al] #908367 01/22/11 11:02 PM 01/22/11 11:02 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	Quote: Did you spin the tc set up with the dist drive installed? Is it possible you pushed the rear cam plug to far in? Never saw that problem before. tight cam bearing not letting cam go back all the way? these are things I would check if you haven't already. This could be possible ,Have you tried a different upper gear? or is the upper gear seated to the block? it's ok to butt heads, just don't do it with a butthead

Re: Possible crank to lower sprocket issue. [Re: rowin4] #908368 01/23/11 04:54 PM 01/23/11 04:54 PM
Joined: Feb 2005 Posts: 2,679 owt west Thread Ender1 master
Thread Ender1 master Joined: Feb 2005 Posts: 2,679 owt west	Quote: Quote: Did you spin the tc set up with the dist drive installed? Is it possible you pushed the rear cam plug to far in? Never saw that problem before. tight cam bearing not letting cam go back all the way? these are things I would check if you haven't already. This could be possible ,Have you tried a different upper gear? or is the upper gear seated to the block? Here is my opinion on the matter, if its a Chinese crank chances could very well be that crank snout is machined up to the main flange more than mornal. I really don't see any problems with the crank sprocket fully seating rearward as the engine is rotating the chain will keep it in line and not walking but...the simplest and most cost effective repair would be to take the extra sprocket and have it milled(machined)to be used as a spacer.

Re: Possible crank to lower sprocket issue. [Re: PUNK] #908369 01/23/11 05:48 PM 01/23/11 05:48 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	Quote: Has anyone ever seen a crank that had the shoulder of the snout in which the lower crank sprocket backs up against be machined too much? In other words, I have an engine over here that has a crank that seems to be allowing the lower crank sprocket to slide on too far which is causing the timing chain to not be in perfect alignment. I tried another timing gear set and found it to be the same result. I guess I could shim the lower sprocket out some to fix this condition. Has anyone else seen this issue? This is a first for me. Also a first with this particular brand crankshaft also. any chance you could tell us what size engine your working on and what brands of parts your using? machine shop owner and engine builder

Re: Possible crank to lower sprocket issue. [Re: Performance Only] #908370 01/23/11 06:13 PM 01/23/11 06:13 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Normally the crank gear should fit snug on the crank,it's shouldn't float as it should be bottomed out on the crank by the dampner.If the issue is at the crank you may have to make a spacer,I would hazzard to guess the problem is cam location.As mentioned make sure the cam plug or anything else has the cam pushed forward.Make sure the timing set is a complete and matched set.Make sure the cam gear is seated and there is nothing between it and the cam face.Some times when rotating an engine the cam walks forward,make sure you push the cam in when checking the alignment.Also check for anything between the cam and plug and make sure that none of the cam bearing are holding the cam forward because of fit.Some of what I mentioned are extreme but warrant checking. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Possible crank to lower sprocket issue. [Re: PUNK] #908371 01/23/11 06:46 PM 01/23/11 06:46 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	You must be talking BB stuff... if the cam is in the right location and the crank sprocket is in too far I would really think the snout is machined wrong... but a spacer could be machined.... you might need to measure another crank to make sure

Re: Possible crank to lower sprocket issue. [Re: PUNK] #908372 01/23/11 08:50 PM 01/23/11 08:50 PM
Joined: Dec 2008 Posts: 184 Central Coast P Plumcrazyracing member
Plumcrazyracing member P Joined: Dec 2008 Posts: 184 Central Coast	I had this very same problem on my Mopar Performance 8 bolt 4.15 stroke crank for my 493 build. The problem ended up being the machining on the snout. the snout was not machined 'back' far enough. The crank gear lined up perfectly fine with the cam gear but there was about 3/32 to an 1/8 of 'shoulder' showing on the snout. I ended up machining the hub on my balancer to fit over the shoulder and rest against the crank gear. Worked very well for me. Next option would have been to pull the crank and have the snout machined correctly.

Re: Possible crank to lower sprocket issue. [Re: Plumcrazyracing] #908373 01/23/11 08:59 PM 01/23/11 08:59 PM
Joined: Dec 2008 Posts: 184 Central Coast P Plumcrazyracing member
Plumcrazyracing member P Joined: Dec 2008 Posts: 184 Central Coast	Here is a pic! 6434774-DSC00019.JPG (41 downloads)

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