 Strut coolant fluid?, what goes in |
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| jaxdream |
 May 23 2009, 11:37 AM
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#1
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Senior Member  Group: Members Posts: 974 Joined: 8-July 08 From: North Central Tennessee Member No.: 9,270 Region Association: South East States  |
I scored a set of 89 Carrea Boge struts to use my 914 inserts in.Pulled the 89 insert out looks like the valving set up used in motorcycle front forks (IMG:style_emoticons/default/WTF.gif) Anyway my 914 insert fits in ok just got to come up with centering rings for the insert , my question is do I fill with some kind of coolant , the Paragon article states either oil or antifrezze , or is this not neccesary for a sealed insert unit ??
Strut prt # 911.341.041/042.04 Do fill with fluid or not ?? (IMG:style_emoticons/default/confused24.gif) Jaxdream |
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| ArtechnikA |
May 23 2009, 01:47 PM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(jaxdream @ May 23 2009, 01:37 PM)  Do fill with fluid or not ?? I always do, otherwise you've made a dandy vacuum bottle... I do not like the idea of anything aqueous in a steel tube... I use a light oil - it doesn't take much. Something like an ATF, although I've heard air-tool oil has some anti-corrosion properties so that's probably what I'll put in the next set of struts I do. Marvel and Lucas make air-tool oil - I think I got a quart of Lucas oil from Summit for not much. |
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| ConeDodger |
May 23 2009, 01:53 PM
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#3
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Apex killer! Group: Members Posts: 23,584 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California 
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Things like some of the 5 mile an hour bumper struts from the era used mineral oil to lube and prevent corrosion. I have taken a couple of these apart and they look pristine inside. Might work in this application too...
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| ejm |
May 23 2009, 03:14 PM
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#4
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I can see the light at the end of the tunnel Group: Members Posts: 2,691 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
Primary reason to add oil is to help heat transfer to the outer housing. Like Rich said, ATF works fine.
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| orange914 |
May 23 2009, 03:25 PM
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#5
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
QUOTE(ConeDodger @ May 23 2009, 11:53 AM) Things like some of the 5 mile an hour bumper struts from the era used mineral oil to lube and prevent corrosion. so thats why the negative term "fish oil" is used with cheap shocks, makes sense now. by no means do i know what i'm doing, but i've used hydrolic oil in koni's with good luck... seemed to make sense in my chaotic mind. (IMG:style_emoticons/default/confused24.gif) |
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| cwpeden |
May 23 2009, 03:34 PM
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#6
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
Unless your racing, how much heat do you think your shocks will generate?
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| ConeDodger |
May 23 2009, 03:40 PM
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#7
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Apex killer! Group: Members Posts: 23,584 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
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QUOTE(cwpeden @ May 23 2009, 01:34 PM) Unless your racing, how much heat do you think your shocks will generate? Our roads aren't as good as they are in BC apparently. Shocks oscillate thousands of times per minute creating lots of heat. Racing could even be better as the asphalt is often better and the transitions smoother. |
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| ArtechnikA |
May 23 2009, 06:01 PM
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#8
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(cwpeden @ May 23 2009, 05:34 PM) Unless your racing, how much heat do you think your shocks will generate? It doesn't really matter... A quart of ATF will do both struts (with a bunch left over) and it's an easy "no downside" As Long As. Consider that what are commonly called 'shock absorbers' aren't (the springs absorb the shocks...) they are really spring dampers and the axial forces can easily be 3X the spring rate. They get hot, and the heat serves no purpose. QUOTE so thats why the negative term "fish oil" is used with cheap shocks Have you ever pulled open an original-to-the-car Boge strut - the ones with *no insert* ? Yes, folks, as delivered from the factory, the pistons ran directly in the strut tube (this was true for /6's, I donno about /4's). I've done that job twice and the Boge hydraulic fluid is as horribly nasty smelling as anything you'd never hope to come across. Dead fish is a good approximation... |
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| Richard Casto |
May 23 2009, 06:26 PM
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#9
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Blue Sky Motorsports, LLC Group: Members Posts: 1,465 Joined: 2-August 05 From: Durham, NC Member No.: 4,523 Region Association: South East States |
I have been told by Koni tech to use antifreeze (they also spec antifreeze on the install instructions). I would expect that if you are using a Boge insert, that Boge's installation instructions should say what to use?
I suspect the problem with oil is that if water does get in that it can/will float the oil out the top leaving a pocket of water at the bottom. This pocket can rust and/or freeze.. While if water gets into the antifreeze that it will still have the anti-rust additives of the antifreeze and it should still protect against freezing in the winter even if diluted somewhat. |
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| cwpeden |
May 23 2009, 07:38 PM
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#10
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
Never mind.
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| jaxdream |
May 23 2009, 10:54 PM
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#11
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Senior Member Group: Members Posts: 974 Joined: 8-July 08 From: North Central Tennessee Member No.: 9,270 Region Association: South East States |
Yep , it was some nasty stuff that came out of the strut. Thanks for the replies , me thinks the Konifolks may be onto something with the antifrezze . That's what will go in upon reassembly.Thanks again... (IMG:style_emoticons/default/piratenanner.gif)
Jaxdream |
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| championgt1 |
May 23 2009, 11:42 PM
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#12
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
When I did the konis on my 924 I used antifreeze.
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