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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhat about weld/pinn the main sprocket to the IMS?
Leading reported evidence
Check ims
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Suggestion
We check the IMS for runout and then pin the main drive sprocket.
What about weld/pinn the main sprocket to the IMS?
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Leading evidence: 'Check ims' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check ims' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
We could always send one on exchange and just charge a core charge until we have time to inspect your actual core that was submitted.
What about weld/pinn the main sprocket to the IMS?
Run solution in an ims
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Suggestion
We have run a solution in an IMS with .015" of runout on the bearing housing bore with no issues, however if the drive sprockets are out more than .005", we junk them.
What about weld/pinn the main sprocket to the IMS?
Use ims solution the only option
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Suggestion · Original poster
Or is using the IMS solution the only option then?
What about weld/pinn the main sprocket to the IMS?
Use some common sense here and do what it takes
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Suggestion
Use some common sense here and do what it takes to avoid future problems while you're in there!
What about weld/pinn the main sprocket to the IMS?
Run solution in an ims
No successful repair reported for this finding.
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Reported fixes
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Unsuccessful attempts
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Read evidence and context
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
We have run a solution in an IMS with .015" of runout on the bearing housing bore with no issues, however if the drive sprockets are out more than .005", we junk them.
What about weld/pinn the main sprocket to the IMS?
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10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
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Hi,
I have read a few posts here about a possibility that the main sprocket on the IMS can slip and cause the timing of the engine to be all wrong.
Looks like I might be doing an overhaul of the engine and splitting the case, would it makes sense to have a shop do this for me?
Or is this an extremely rare occurrence? Seems a little fishy if the sprocket is just pressed on the shaft? I would think there would be a high torque bolt keeping everything together.
thanks
/ Carl
We check the IMS for runout and then pin the main drive sprocket.
https://lnengineering.com/rnd-store/...d-service.html
Here is an example of one that visually looked just fine. Reusing this shaft would have caused an IMS failure.
Nope, that one came out of a running engine. Bearing had not failed. It would have passed a visual inspection. We normally fail any shaft with more than .005" runout if going to be used with a ball or roller bearing.
Ok, so what do you do in that case? Have the customer get another shaft? Or do you charge them $1000 for a core since what they send in doesn't work?
Or is using the IMS solution the only option then?
We have run a solution in an IMS with .015" of runout on the bearing housing bore with no issues, however if the drive sprockets are out more than .005", we junk them. Not worth the risk. We keep a very large core bank of intermediate shafts that have been checked and pinned - probably 20 of each type or so. We usually offer them on exchange, but if a customer's core is bad, we just charge them market rate for a good core.
We typically do them in batches every few weeks. Evaluation of the submitted core would be the biggest holdup. We could always send one on exchange and just charge a core charge until we have time to inspect your actual core that was submitted.
Normally this isn't an issue as most people send their IMS shaft with blocks, so by the time the block comes back from plating, everything else that would accompany the block is completed and ready to go.
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