Today's Message Index:
----------------------
1. 06:08 AM - Re: Knocking In Lord Mount at Idle (Sean Stephens)
2. 07:37 AM - Re: Knocking In Lord Mount at Idle (Flight_Time)
3. 07:51 AM - Re: SB 2014-08-29 (Carlos Trigo)
4. 11:45 AM - Re: Knocking In Lord Mount at Idle (Gordon)
5. 04:40 PM - Re: Knocking In Lord Mount at Idle (Sean Stephens)
Message 1
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| Subject: | Re: Knocking In Lord Mount at Idle |
I'll check the mount again. From page FF1-5 of the plans...
Gordon, the J-3804-20 spacer is supposed to float around inside the
J-3804-20 durometer, but may be contacting the inside wall of the
durometer? I'll check again to see if there are signs of that
happening. Another possibility that I just thought of is that if the
hole in the WD-1001 motor mount that the AN7-26 bolt passes through has
too much play, then the bolt itself could be rattling in there? The
bolt was torqued to ~40 ft. lbs. according to Section 5V.
The engine has been hung on the mounts for roughly a year and the engine
has about 50 tach hours on it, so hoping it is not because they are old.
-Sean
> Gordon <mailto:mregoan@hispeed.ch>
> September 4, 2014 at 12:55 AM
>
> Hi Sean, If the mounts are old and sagged, or the assembly is off
> center, additional movement from shutdown vibration can cause the bolt
> sleeve to knock against the inside bore of the mounts. That should be
> a metal on rubber contact, but might cause the mount to tap on the
> bore in the ear giving a metal to metal contact.
>
> Good luck with the search.
>
> Gordon
> 41015 Switzerland
>
>
Message 2
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| Subject: | Re: Knocking In Lord Mount at Idle |
I had the same problem early on. Found that the through bolt was not tightened/torqued
properly. Torqued the bolts on all four mounts and never had the problem
again.
Jearl Strickland
Message 3
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| Subject: | Re: SB 2014-08-29 |
Ok, no problem.
I will contact Van's.
Yes, I will attend the EFLEVA meeting in Italy.
Best
Carlos
Enviado do meu iPhone
No dia 03/09/2014, s 21:39, Werner Schneider <glastar@gmx.net> escreveu:
>
> Hello Carlos,
>
> I'm afraid to late Michael did order for all 4 Swiss (at least what we've discussed)
but it's easy, you call Van's have your serial handy and tell the status
of your engine mount.
>
> Are you in Bracciano for the EFLEVA meeting?
>
> Cheers Werner
>
> do not archive
>
> On 03.09.2014 17:45, Carlos Trigo wrote:
>> Hello Werner
>>
>> If you decide to order the parts for this SB, count with1 set for me.
>>
>> Regards
>>
>> Carlos
>>
>> -----Mensagem original-----
>> De: owner-rv10-list-server@matronics.com
>> [mailto:owner-rv10-list-server@matronics.com] Em nome de Werner Schneider
>> Enviada: 3 de setembro de 2014 16:27
>> Para: rv10-list@matronics.com
>> Assunto: Re: RV10-List: SB 2014-08-29
>>
>> <mailto:glastar@gmx.net>>
>>
>> Thanks for the update on that Tim, I've not seen that posting strange
>> but I know now.
>>
>> I guess there will then be an SB update on that.
>>
>> Cheers Werner
>>
>> On 03.09.2014 16:46, Tim Olson wrote:
>>
>> <mailto:Tim@myrv10.com>>
>>
>> >
>>
>> > Hi,
>>
>> > I posted it that same day. The Van's tech team ..........
>>
>> >
>>
>> > Tim
>>
>> >
>>
>> >
>>
>> http://www.matronics.com/Navigator?RV10-List
>>
>> http://forums.matronics.com
>>
>> http://www.matronics.com/contribution
>>
>> *
>>
>>
>> *
>>
>
>
>
>
Message 4
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| Subject: | Re: Knocking In Lord Mount at Idle |
Sean, not quite. The spacer and durometers should be clamped as a rigid stack to
the engine mount by the bolt if properly torqued. When the engine shakes the
durometers deform in shear, allowing the dynafocal engine mount boss to move
laterally. There should normally be enough clearance, but if the elastomers are
already deformed when static this clearance can be used up.
Another thought - perhaps the stack could be loose if the nut is torqued up onto
the runout of the bolt thread. I ran into this problem on one of my mounts and
added another washer under the nut to prevent it.
Gordon
On 04.09.2014, at 15:06, Sean Stephens <sean@stephensville.com> wrote:
>
> I'll check the mount again. From page FF1-5 of the plans...
>
> Gordon, the J-3804-20 spacer is supposed to float around inside the J-3804-20
durometer, but may be contacting the inside wall of the durometer? I'll check
again to see if there are signs of that happening. Another possibility that
I just thought of is that if the hole in the WD-1001 motor mount that the AN7-26
bolt passes through has too much play, then the bolt itself could be rattling
in there? The bolt was torqued to ~40 ft. lbs. according to Section 5V.
>
> The engine has been hung on the mounts for roughly a year and the engine has
about 50 tach hours on it, so hoping it is not because they are old.
>
> -Sean
>
>> Gordon <mailto:mregoan@hispeed.ch>
>> September 4, 2014 at 12:55 AM
>>
>> Hi Sean, If the mounts are old and sagged, or the assembly is off center, additional
movement from shutdown vibration can cause the bolt sleeve to knock against
the inside bore of the mounts. That should be a metal on rubber contact,
but might cause the mount to tap on the bore in the ear giving a metal to metal
contact.
>>
>> Good luck with the search.
>>
>> Gordon
>> 41015 Switzerland
>>
>>
>>
>>
>>
>
>
>
>
Message 5
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| Subject: | Re: Knocking In Lord Mount at Idle |
Gordon, you are the man. It was indeed because the nut torqued on the
bolt thread runout. Added a washer and problem solved. No more knocking.
If we ever cross paths I owe you a cold one. Thanks!
-Sean
> Gordon <mailto:mregoan@hispeed.ch>
> September 4, 2014 at 1:44 PM
>
> Sean, not quite. The spacer and durometers should be clamped as a
> rigid stack to the engine mount by the bolt if properly torqued. When
> the engine shakes the durometers deform in shear, allowing the
> dynafocal engine mount boss to move laterally. There should normally
> be enough clearance, but if the elastomers are already deformed when
> static this clearance can be used up.
>
> Another thought - perhaps the stack could be loose if the nut is
> torqued up onto the runout of the bolt thread. I ran into this problem
> on one of my mounts and added another washer under the nut to prevent it.
>
> Gordon
>
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