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Post by p5tgc on Sept 17, 2007 14:51:29 GMT
In a recent issue one of the classic car mag writers suggested using plumbers PTFE thread tape on the thread of a sump plug, if a replacement copper washer were not available.
This seems like a good idea, but will this type of tape resist attack by oil? Has anyone tried this, and with what success?
Would this tape also resist attack by petrol, if used on (say) petrol pump threads?
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Post by harvey on Sept 17, 2007 15:10:33 GMT
PTFE is fine for either application, although I would only use it on a sump plug in conjunction with, not in place of, a washer.
As for fuel pipes, I would only use it to cure leaks that can't be cured by normal correct fitting, not as a matter of course.
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Deleted
Deleted Member
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Post by Deleted on Sept 17, 2007 15:23:41 GMT
It is a good insulator and should never be used on single pole temperature sensors.
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Post by Warwick (Ozcoupe) on Sept 19, 2007 8:42:24 GMT
Also check the quality of the tape. Thickness, tear-strength etc.
Here in Australia all brands of white tape were good years ago but as it became more readily available it got crappier and crappier to the point where it was difficult to wrap it firmly into the threads. It would just pull away and tear before it adhered to itself. It also needed many more turns if you did get it to stay put.
Then they introduced a yellow one for gas-fitters (NG & LPG)and it was up to the original standard. Now for the last few years there has been a pink one for plumbers. It too is like the original white one.
AND WHILE ON THE SUBJECT OF TEFLON TAPE.....
a word of warning about using any PTFE tape on welding gas fittings. Any tradesman and DIY welder will be familiar with the warnings printed on the cylinder regulator pressure gauges...USE NO OIL.
Unless you know what you're doing (I mean really know) you shouldn't attempt to repair oxygen and acetylene equipment and fittings. If pressure gauges need replacing, or fittings leak, take it to a BOC shop or similar place for repair.
NEVER EVER use thread tape because it contains traces of oil and can ignite or explode when subjected to oxygen. If the cylinder fitting leaks you need a new one, or a new genuine O-ring or washer..... not tape.
If the hose fittings or gauge threads leak they must only be resealed by a special grade of Loktite or "Oxygen" tape (green in this part of the world), and by someone who knows what he's doing.
Warwick.
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