Exhaust Insulation tape

Scaramoosh

Scaramoosh

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We sprang a leak on our stainless steel exhaust weld, got a good price for redoing the welds but I am being quoted neatly £150 for the tapes (one fiberglass and one "silver" foil) to redo the insulation. The exhaust is only about 1.5 meters in length. I am told a 50ft length of tape is sufficent.


Any ideas who sells these at a sensible price
 
[ QUOTE ]
We sprang a leak on our stainless steel exhaust weld, got a good price for redoing the welds but I am being quoted neatly £150 for the tapes (one fiberglass and one "silver" foil) to redo the insulation. The exhaust is only about 1.5 meters in length. I am told a 50ft length of tape is sufficent.


Any ideas who sells these at a sensible price

[/ QUOTE ]Yes!

here

and glass fibre tape as well.
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"Artificial intelligence is no match for natural stupidity"
 
Bit steep. Aquafax on the trading estate at Hamble (ensign trading estate or admiralty trading estate can't remeber) just after the aeroplane on way to hamble point will sell a massive reel of the fibreglass stuff for 20 quid. wrap it tight and garden wire (ie er wire ) it.

You need aluminium foil tape (like actual real metal aluminium and not the crinkly chrome-finish tape which will melt) to compeltely wrap this up hiding all the fibreglass wadding and i think you can get it at motor factors and halford sort of places for £10-£15 for 50m. Or mebbe aquafax but don't think so...
 
I got mine from ASAP - asap-supplies.com I think. Cost about a tenner for the insulation and I did not bother with the metallic.
 
You may need the metallic

the metallic tape doesn't seem to do much, but i think it is critical: without it, as the glass fibres slowly disintegrate, the engines suck off whisps of it and the air filetrs (and everything else) becomes slowly coated in fine glass fibres, as happened to us. Entirely covering the fibre wrap means that the fibrewrap can't escape in this way.

Incidentally, to the original poster, are you happy abiout the cause of the original fracture in the exahust? There may have been too much vibration, or too much heat from the engine? With older engines tho, it's just age and holes just occur at hot elbows so no need to worry if that's what it was.
 
Re: oh and

the exhaust wrap needs to be taken around the exhaust and kept as TIGHT AS POSSIBLE. This is cos the metallic aluminium tape isn't strong enough and can't tighten an otherwise loose bandage. If it's loose, then more of the bandgae fibres are allowed to waft free and the whole soggy lot deteriorates quickly. For extra securtiy, once to bandage is on, put wire or even big hose clips around, and then the metallic tape round. On a bend, it is more effiicent and loads easier to use single strips of tape ecah about he circumference of the now-bandaged exhaust - there's no additional "strength" to be gained by applying the ally tape in one massive coil as with stronger tapes where you can gradual tighten the whole thing cos the tape is weak under tension.
 
Re: You may need the metallic

The engine is 5 years old (Volvo 63P) with just over 700 hours running.

I think it was probably a poor original weld, there was no vibration but while we haven't used it as a step we are the 3rd owner of the boat so can't be sure how she was treated before we owned her.

The Tempreature gauges read the same for both engines so hopefully not due to overheating. Thanks for your comments though.
 
Re: You may need the metallic

Failures like this are often due to fatigue from repeated expansion and contraction as the exhaust heats and cools each time it is used.
 
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