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Idler Gear Bearing Failure?


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#1 Minigman

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Posted 08 January 2020 - 05:58 PM

I start the engine from cold in neural and all is well apart from a whining noise which appears to come from the transfer case. If you press the clutch in the whining stops and the revs drop slightly.

Once the car is warmed up for 10 mins the whining stops and a clattering sound starts. If you push the clutch in then it just stalls as you can’t keep the revs up.

Is this the idler bearing that has failed?

Is there any test I can do to confirm this before pulling the engine?

Engine has done about 1200 miles since a full rebuild.

Edited by Minigman, 08 January 2020 - 06:00 PM.


#2 alex-95

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Posted 08 January 2020 - 06:16 PM

Sounds like it to me, I had the same symptoms of whining and then depress the clutch and it would go (not the stalling though).

 

I'm guessing it was brand bearings?



#3 KTS

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Posted 08 January 2020 - 06:34 PM

disengaging the clutch should disconnect the idler gear train from the crank so i'd have thought that would suggest something other than idler/drop gear issue if the engine stalls when the clutch disengaged 

 

might failure of the primary gear bearings be a reason for the engine stalling when putting the clutch pedal down ? 



#4 GraemeC

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Posted 08 January 2020 - 06:48 PM

Without the engine running, get someone to push the clutch pedal up and down whilst you watch the bottom pulley. Does the pulley move in and out?



#5 nicklouse

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Posted 08 January 2020 - 06:58 PM

as said when the clutch is pressed the gears are disengaged so it will be higher up. so primary gear or thrust washers or my just be the release bearing.



#6 GraemeC

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Posted 08 January 2020 - 07:35 PM

as said when the clutch is pressed the gears are disengaged.....

not if the primary bushes have picked up and seized onto the crank tail.

but that wouldn’t explain the stalling


Edited by GraemeC, 08 January 2020 - 07:36 PM.


#7 Rorf

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Posted 08 January 2020 - 07:51 PM

Sounds like the crankshaft thrust bearings are on their way out and the crank web could be hitting the front of the engine block when the clutch is depressed.

 

What ever, it is engine out and strip to investigate the problem. Unfortunately it sounds like a bad engine build.



#8 nicklouse

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Posted 08 January 2020 - 07:53 PM

 

as said when the clutch is pressed the gears are disengaged.....

not if the primary bushes have picked up and seized onto the crank tail.

but that wouldn’t explain the stalling

 

Yep just clarifying the normal operation.



#9 KTS

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Posted 08 January 2020 - 08:04 PM

you'll know if it's crank thrust bearing failure when you drain the oil as it'll be full of metal..



#10 Minigman

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Posted 08 January 2020 - 08:06 PM

Sounds like the crankshaft thrust bearings are on their way out and the crank web could be hitting the front of the engine block when the clutch is depressed.

What ever, it is engine out and strip to investigate the problem. Unfortunately it sounds like a bad engine build.



A bad engine build or poor quality parts ( I guess that’s the same thing?) most parts came from our good chums at minispares.

#11 Moke Spider

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Posted 08 January 2020 - 08:58 PM

It does sound like Idler Gear to me too.

 

Short of it being a Primary Gear, regardless, as Rolf mentioned, the engine needs to come out.



#12 Minigman

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Posted 08 January 2020 - 09:00 PM

It does sound like Idler Gear to me too.

Short of it being a Primary Gear, regardless, as Rolf mentioned, the engine needs to come out.


Yeah I know. This engine has done 1200 ish miles and this will be it’s 4th time back out. First 3 times for cam bearing issues. Won’t be using this engine builder again that’s for sure.

#13 Minigman

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Posted 08 January 2020 - 10:06 PM

So it’s looking like I made a bad mistake using the engine builder I have. Just too many issues to think anything else to be honest.

So who do I get to look at and potentially rebuild my engine?

Having spent £4500 on this build which has been nothing but trouble since it was built 1200 miles ago, I can not mess up again.

Recommendations welcomed please. Geographic location not important as happy to travel for the right job.

#14 imack

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Posted 10 January 2020 - 06:21 AM

Not had an engine built by anyone, always built my own after having all machine work carried out by MED, or back in the 80's I used Avonbar.
Never heard of any poor builds from the likes of MED, Swiftune or KAD.

#15 Moke Spider

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Posted 10 January 2020 - 07:37 AM

So it’s looking like I made a bad mistake using the engine builder I have. Just too many issues to think anything else to be honest.

So who do I get to look at and potentially rebuild my engine?

Having spent £4500 on this build which has been nothing but trouble since it was built 1200 miles ago, I can not mess up again.

Recommendations welcomed please. Geographic location not important as happy to travel for the right job.

 

Would you consider doing it yourself ?






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