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How do I diag mains bearings fault
Posted: Sun Jun 27, 2010 10:38 pm
by AlMcL
Still have noise when reving engine,great on tick over but once you start to accelerate over 2000 revs approx noise comes on,this is only light but very annoying is there anywhere local to south shields to drive to and if a second opinion B4 it does any further damage.Thanks any help would be great.
Re: How do I diag mains bearings fault
Posted: Mon Jun 28, 2010 12:30 am
by bmcecosse
Mains tend to 'rumble' - suggesting a deepish noise, with some vibration. I suggest you retard the ignition timing slightly - to make sure your noise is not just 'pinking'. And of course - an oil pressure reading will tell all.
Re: How do I diag mains bearings fault
Posted: Mon Jun 28, 2010 7:53 am
by mike.perry
My oil pressure settles down to a healthy 30 psi running with the oil pressure light coming on at 15-20 psi and the engine sounds like a bag of old nails, but my Traveller made it from Reading to Harewood and back at 60-65 mph and sounded just the same after the trip.
Re: How do I diag mains bearings fault
Posted: Mon Jun 28, 2010 8:40 pm
by bmcecosse
Oil pressure light should come on at ~ 7 psi, so I suspect your gauge is reading high! It should be showing 60 psi at any decent revs - 70 psi at 70 mph if (like me) you have packed the relief valve slightly.
Re: How do I diag mains bearings fault
Posted: Mon Jun 28, 2010 8:48 pm
by HarryMango
mike.perry wrote: my Traveller made it from Reading to Harewood and back at 60-65 mph
Was that with the dog pedalling as well
Rog
Re: How do I diag mains bearings fault
Posted: Mon Jun 28, 2010 9:05 pm
by hotrodder13
my oil pressure starts at 70 at 70 but then goes down to about 55 when hot
Re: How do I diag mains bearings fault
Posted: Mon Jun 28, 2010 9:16 pm
by bmcecosse
Is that with 20W50 oil ? You may want to invest in an oil cooler. Worth fitting a 74 degree thermostat for the summer - so the engine runs that little bit cooler.
Re: How do I diag mains bearings fault
Posted: Tue Jun 29, 2010 7:22 am
by hotrodder13
yes 20w50 i'll get the thermostat but were can i get an oil cooler
Re: How do I diag mains bearings fault
Posted: Tue Jun 29, 2010 9:49 am
by bmcecosse
ebay ? Any of the Mini places - although tend to be expensive.
Re: How do I diag mains bearings fault
Posted: Tue Jun 29, 2010 6:34 pm
by MarkyB
Actually AlMcLs initial question was spot on, someone needs to listen to the noise to diagnose it.
Where is his nearest branch, they should be able to help.
Trying to diagnose a sound you haven't heard is always going to be tricky to put it mildly.
Maybe he could record a video and put it on you tube then we will have something to go on.