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912 radiator failure

 
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john.marzulli(at)gmail.co
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PostPosted: Mon Dec 03, 2012 8:38 am    Post subject: 912 radiator failure Reply with quote

I just found a crack in mine... funny timing with this discussion. This was at about 168 hours, and on the pilot's side.

For those that have experienced these radiator mount failures, have the cracks developed on one side more than the other?
John Marzulli

http://MarzulliPhoto.net/
http://701Builder.blogspot.com/


On Tue, Nov 6, 2012 at 12:16 PM, George Inman <ghinman(at)mts.net (ghinman(at)mts.net)> wrote:
[quote] --> Zenith701801-List message posted by: George Inman <ghinman(at)mts.net (ghinman(at)mts.net)>



       I had the tab that connects to the rubber mount of the rad. break off.
I made tabs out of stainless steel sheet and riveted them on
        It is OK after about 50hrs


Good point, Bud, but I'm talking about the  thin aluminum bracket that
mounts on the engine block and supports the rubber  mounts you speak of. This
thin aluminum fatigue cracks. I've patched it a  couple times and in still
cracks.

--
George H. Inman
ghinman(at)mts.net (ghinman(at)mts.net)


====================================
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ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
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====================================
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====================================



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Dan Wilde



Joined: 05 Jun 2011
Posts: 34

PostPosted: Mon Dec 03, 2012 9:51 am    Post subject: 912 radiator failure Reply with quote

I just started the annual inspection of my 701 a few days ago and found that the pilot side radiator mount was cracked at the forward most fixture that bolts to the engine. There was no cracking found on the other side of the engine. I have about 260 hours on my plane.

I have a new mount on order. It seems that maybe this part should be beefed up?

Dan Wilde




On 12/3/2012 8:37 AM, John Marzulli wrote:

[quote]I just found a crack in mine... funny timing with this discussion. This was at about 168 hours, and on the pilot's side.

For those that have experienced these radiator mount failures, have the cracks developed on one side more than the other?
John Marzulli

http://MarzulliPhoto.net/
http://701Builder.blogspot.com/


On Tue, Nov 6, 2012 at 12:16 PM, George Inman <ghinman(at)mts.net (ghinman(at)mts.net)> wrote:
Quote:
--> Zenith701801-List message posted by: George Inman <ghinman(at)mts.net (ghinman(at)mts.net)>



I had the tab that connects to the rubber mount of the rad. break off.
I made tabs out of stainless steel sheet and riveted them on
It is OK after about 50hrs


Good point, Bud, but I'm talking about the thin aluminum bracket that
mounts on the engine block and supports the rubber mounts you speak of. This
thin aluminum fatigue cracks. I've patched it a couple times and in still
cracks.

--
George H. Inman
ghinman(at)mts.net (ghinman(at)mts.net)


====================================
om" target="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
====================================
-List" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
====================================
http://forums.matronics.com
====================================




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john.marzulli(at)gmail.co
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PostPosted: Mon Dec 03, 2012 10:16 am    Post subject: 912 radiator failure Reply with quote

I talked to Roger today. He told me they have increased the thickness of the mount. Mine is from the original "vintage" of that style of cowl, about 4 years old.

The replacement costs $48 per side!


Dan - that sounds like exactly the same position as where mine cracked.
John Marzulli

http://MarzulliPhoto.net/
http://701Builder.blogspot.com/


On Mon, Dec 3, 2012 at 9:50 AM, Dan Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)> wrote:
[quote] I just started the annual inspection of my 701 a few days ago and found that the pilot side radiator mount was cracked at the forward most fixture that bolts to the engine.  There was no cracking found on the other side of the engine.   I have about 260 hours on my plane. 

I have a new mount on order.   It seems that maybe this part should be beefed up?

Dan Wilde




On 12/3/2012 8:37 AM, John Marzulli wrote:


Quote:
I just found a crack in mine... funny timing with this discussion. This was at about 168 hours, and on the pilot's side.

For those that have experienced these radiator mount failures, have the cracks developed on one side more than the other?

John Marzulli

http://MarzulliPhoto.net/
http://701Builder.blogspot.com/



On Tue, Nov 6, 2012 at 12:16 PM, George Inman <ghinman(at)mts.net (ghinman(at)mts.net)> wrote:

Quote:
--> Zenith701801-List message posted by: George Inman <ghinman(at)mts.net (ghinman(at)mts.net)>



       I had the tab that connects to the rubber mount of the rad. break off.
I made tabs out of stainless steel sheet and riveted them on
        It is OK after about 50hrs


Good point, Bud, but I'm talking about the  thin aluminum bracket that
mounts on the engine block and supports the rubber  mounts you speak of. This
thin aluminum fatigue cracks. I've patched it a  couple times and in still
cracks.

--
George H. Inman
ghinman(at)mts.net (ghinman(at)mts.net)



====================================
om" target="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
====================================
-List" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
====================================
http://forums.matronics.com
====================================





Quote:


_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
_blank">http://www.matronics.com/contribution
ist" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
tp://forums.matronics.com


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Dan Wilde



Joined: 05 Jun 2011
Posts: 34

PostPosted: Mon Dec 03, 2012 1:15 pm    Post subject: 912 radiator failure Reply with quote

John: I ordered one for the other side just in case. The cost hurt some but if that's all my annual costs me I will be happy!

Dan




On 12/3/2012 10:16 AM, John Marzulli wrote:

[quote]I talked to Roger today. He told me they have increased the thickness of the mount. Mine is from the original "vintage" of that style of cowl, about 4 years old.

The replacement costs $48 per side!


Dan - that sounds like exactly the same position as where mine cracked.
John Marzulli

http://MarzulliPhoto.net/
http://701Builder.blogspot.com/


On Mon, Dec 3, 2012 at 9:50 AM, Dan Wilde <stolpilot.wilde(at)gmail.com (stolpilot.wilde(at)gmail.com)> wrote:
Quote:
I just started the annual inspection of my 701 a few days ago and found that the pilot side radiator mount was cracked at the forward most fixture that bolts to the engine. There was no cracking found on the other side of the engine. I have about 260 hours on my plane.

I have a new mount on order. It seems that maybe this part should be beefed up?

Dan Wilde




On 12/3/2012 8:37 AM, John Marzulli wrote:


Quote:
I just found a crack in mine... funny timing with this discussion. This was at about 168 hours, and on the pilot's side.

For those that have experienced these radiator mount failures, have the cracks developed on one side more than the other?

John Marzulli

http://MarzulliPhoto.net/
http://701Builder.blogspot.com/



On Tue, Nov 6, 2012 at 12:16 PM, George Inman <ghinman(at)mts.net (ghinman(at)mts.net)> wrote:

Quote:
--> Zenith701801-List message posted by: George Inman <ghinman(at)mts.net (ghinman(at)mts.net)>



I had the tab that connects to the rubber mount of the rad. break off.
I made tabs out of stainless steel sheet and riveted them on
It is OK after about 50hrs


Good point, Bud, but I'm talking about the thin aluminum bracket that
mounts on the engine block and supports the rubber mounts you speak of. This
thin aluminum fatigue cracks. I've patched it a couple times and in still
cracks.

--
George H. Inman
ghinman(at)mts.net (ghinman(at)mts.net)



====================================
om" target="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
et="_blank">www.homebuilthelp.com
="_blank">http://www.matronics.com/contribution
le, List Admin.
====================================
-List" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
====================================
http://forums.matronics.com
====================================





Quote:


_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
_blank">http://www.matronics.com/contribution
ist" target="_blank">http://www.matronics.com/Navigator?Zenith701801-List
tp://forums.matronics.com





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