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HKS oil cooler damage

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aslsa.rng(at)gmail.com
Guest

Posted: Tue Aug 04, 2009 4:00 pm Post subject: HKS oil cooler damage

Just a note to the HKS flyers. I found out the hard way today that the HKS oil cooler is susceptible to cracking around the threaded fittings if it's mounted too rigidly. I first noted that the spacer on the mounting bolt was loose and after tightening it I noticed oil around the base of the fitting and along the top of the cooler. Tightened the hose nut, cleaned the top of the cooler and went flying. When I landed there was more oil. More cleaning, another snug up of the nut and more flying. More oil. Cleaned the oil off again and let stand this time. Pressure still in the system pushed oil out the crack. Hopefully a TIG welder can fix it or I'll be shopping for a new oil cooler. Now to figure out a way to suspend the cooler so it doesn't happen again. Fortunately the Yard Store has a great selection of dampers and shock mounts. 



Rick Girard



  [quote][b]

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue Aug 04, 2009 4:19 pm Post subject: HKS oil cooler damage

My coolers are mounted on four 582 radiator shock  mounts.

  

 I tried flying with two on top and hard mounting  the bottom with a couple 6" long 4130 straps.  I broke a cooler lug in less  than an hour's flight time.

  

 john h

 mkIII

 [quote]    



Just a note to the HKS flyers. I    found out the hard way today that the HKS oil cooler is susceptible to    cracking around the threaded fittings if it's mounted too rigidly.     



   Rick Girard

    



[b]

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

aslsa.rng(at)gmail.com
Guest

Posted: Tue Aug 04, 2009 4:34 pm Post subject: HKS oil cooler damage

I have some radiator shock mounts but there's no room for them unless I get new pipes to the muffler. I'll go out and take a few pics tonight. Maybe someone on the list can come up with a way I'm not seeing. Thanks John. At least I got 155 hours before it cracked. 



Rick Girard

do not archive



On Tue, Aug 4, 2009 at 7:18 PM, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:

 [quote]       My coolers are mounted on four 582 radiator shock  mounts.

  

 I tried flying with two on top and hard mounting  the bottom with a couple 6" long 4130 straps.  I broke a cooler lug in less  than an hour's flight time.

  

 john h

 mkIII

  	  Quote: 	
		      



Just a note to the HKS flyers. I    found out the hard way today that the HKS oil cooler is susceptible to    cracking around the threaded fittings if it's mounted too rigidly.     



   

Rick Girard

    



	
    	  Quote: 	
		  



get="_blank">http://www.matronics.com/Navigator?Kolb-List

tp://forums.matronics.com

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[b]

Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Tue Aug 04, 2009 5:24 pm Post subject: Re: HKS oil cooler damage

Not sure how your oil cooler mounts so this may not apply, but I have used rubber exhaust hangars for years to hold up the muffler with no problems. Buy them at Advance auto parts, grind off the rivet that holds them to the metal hangar strap, throw away the strap, keep the rubber. Cost about $3 a pair. Replace every third year.



Richard Pike

MKIII N420P (420ldPoops)

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lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Tue Aug 04, 2009 7:50 pm Post subject: HKS oil cooler damage

Would it be possible for you to send me a picture of how  you mounted your cooler, I am having a hard time understanding how it  cracked.

 Larry

 [quote]   ---

_________________
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aslsa.rng(at)gmail.com
Guest

Posted: Tue Aug 04, 2009 8:11 pm Post subject: HKS oil cooler damage

Richard, Thanks, the cooler shares its mount with that of the muffler using a through bolt and a spacer to link the top and bottom mounting ears of the cooler on each side. 



Rick Girard

do not archive

 

On Tue, Aug 4, 2009 at 8:24 PM, Richard Pike <richard(at)bcchapel.org (richard(at)bcchapel.org)> wrote:

 	  Quote: 	
		   --> Kolb-List message posted by: "Richard Pike" <richard(at)bcchapel.org (richard(at)bcchapel.org)>

 

 Not sure how your oil cooler mounts so this may not apply, but I have used rubber exhaust hangars for years to hold up the muffler with no problems. Buy them at Advance auto parts, grind off the rivet that holds them to the metal hangar strap, throw away the strap, keep the rubber. Cost about $3 a pair. Replace every third year.

  

 Richard Pike

 MKIII N420P (420ldPoops)

 

 

 

 

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aslsa.rng(at)gmail.com
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Posted: Tue Aug 04, 2009 8:23 pm Post subject: HKS oil cooler damage

Larry, I attached this pic to my reply to Richard Pike, but it really should have been here.



On Tue, Aug 4, 2009 at 10:44 PM, Larry Cottrell <lcottrell(at)fmtcblue.com (lcottrell(at)fmtcblue.com)> wrote:

 [quote]       Would it be possible for you to send me a picture of how  you mounted your cooler, I am having a hard time understanding how it  cracked.

 Larry

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lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Wed Aug 05, 2009 11:28 am Post subject: HKS oil cooler damage

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slyck(at)frontiernet.net
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Posted: Wed Aug 05, 2009 11:53 am Post subject: HKS oil cooler damage

The length and rigidity of the hoses are key.  Yours appear to be long enough to solve the problem.My 3cyl is a born vibrator and I wanted everything compact as possible, so with my short hoses in consideration

I mounted both the water radiator and oil cooler on a semi floating framework attached to the front

of the engine. They all shake somewhat in unison.  Seems to be working out ok.  I'll keep an eye on it.

BB

On 5, Aug 2009, at 3:24 PM, Larry Cottrell wrote:

[quote] 

[quote]---

Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Wed Aug 05, 2009 2:53 pm Post subject: HKS oil cooler damage

At 03:24 PM 8/5/2009, Larry Cottrell wrote:

  	  Quote: 	
		     I am surprised that the stiffness of the hoses could cause enough stress to crack the cooler. Could there be any other factor? Below is a picture of my mounting. 	
 

 It's not the stiffness of the hose, but the mass of the oil filled hose vibrating.



 -Dana

 

 --

  1.  Programmers are expensive.

 2.  Press releases are cheap.

 3.  Therefore, it's cheaper to explain the bug than to fix it.    [quote][b]

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