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  #1  
Old 09-03-2017, 04:26 PM
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Adhesive for cast iron fuel distributor?

I recently rebuilded my cast iron fuel distributor, but I'm having problems keeping the thing from leaking. All the adhesives that I've tried got dissolved in a matter of weeks.
So far I tried:
-Loctite 567
-Loctite 518
-Loctite 277

Does anyone have any suggestions of good sealants?

PS: the gasoline around here has quite a lot of ethanol too, which I suspect dissolves most common adhesives.
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  #2  
Old 09-03-2017, 05:58 PM
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I'd expect there to be o rings or similar keeping it sealed up.

There isn't much in the way of sealers that will stand up to gasoline with ethanol or not. For flat machined surfaces, Permatex Set and Seal works but I don't know if it will resist gasoline since it is mostly an engine oil sealer.
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  #3  
Old 09-03-2017, 06:30 PM
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97 SL320: On the cast iron FD the membrane that separates the two halves is metallic, and needs to be sealed. This in contrast to the aluminium ones, where the membrane is rubber and doesn't require any sealant.

I have no idea how they did it in the factory though.
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  #4  
Old 09-03-2017, 07:36 PM
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Loctite 515.
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  #5  
Old 09-03-2017, 10:06 PM
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Dubyagee: do you have a first hand experience with it? I just checked the technical data sheet for it and it states that the product degrades a lot on the presence of gasoline.
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  #6  
Old 09-03-2017, 10:08 PM
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On an older machine work, we use the 515 on pipe thread hydraulic fittings, works great.

I'd want to see a material comparability chart showing gasoline though.
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  #7  
Old 09-03-2017, 10:13 PM
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Here: http://tds.henkel.com/tds5/Studio/ShowPDF/515-EN?pid=515&format=MTR&subformat=REAC&language=EN&plant=WERCS

Doesn't like gasoline...
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  #8  
Old 09-03-2017, 10:58 PM
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Ive never seen it fail in various liquids and pressures.

This may be what your after.

https://www.permatex.com/products/gasketing/gasket-sealants/permatex-permashield-fuel-resistant-gasket-dressing-flange-sealant/
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  #9  
Old 09-04-2017, 07:31 PM
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Thanks Dubyagee.
I'm gonna give it a try.
I also found this Loctite 1114. Looks like it is similar to the Permatex one.
I'll try them both and report.
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