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  1. #1
    Join Date
    May 2016
    Location
    Plymouth
    Age
    43
    Posts
    159

    exhaust wrap coating

    All those that use exhaust wrap on their headers has anyone sprayed the wrap with Themo-Tec exhaust wrap coating, for example?

    https://www.merlinmotorsport.co.uk/p...k-ex-wrap-aero

    Having had my coolant spill out of my header tank onto my exhaust headers and then spontaneously set on fire I think this was worsened by the wrap. I think the wrap absorbed the coolant and therefore fuelled the fire for longer. I was thinking if I spray my new wrap this might go someway to preventing this in future.

    thanks
    Granada based Pilgrim Sumo with RV8 - May 2017
    YouTube Build diary:
    https://www.youtube.com/channel/UCJnGMrv_CkERYzoG68enTGg

  2. #2
    Join Date
    Nov 2013
    Location
    My Garage
    Posts
    969
    I dont use anything on my RV8 SS exhaust headers and pipes, never had any trouble
    MKIII Pilgrim Sumo. 3.5 Litre Rover V8 Towing an Eriba Puck Caravan



  3. #3
    Join Date
    Mar 2007
    Location
    Lincolnshire
    Posts
    328
    Yes I have used it. Been on 20 years now with no issues. Also hides any oil stains.
    Crendon 427 Chassis no. 10 - 351 Cleveland. Tot Rod mini me.

  4. #4
    Join Date
    Nov 2016
    Location
    Stevenage
    Age
    48
    Posts
    280
    Should coolant go on fire? Though it was just oil on headers could do that

  5. #5
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    41
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    4,054
    Quote Originally Posted by Cobragreyhead View Post
    Should coolant go on fire? Though it was just oil on headers could do that
    Yes! The glycol portion is quite flammable: https://www.jcmmachineandcoatings.co...-it-flammable/
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  6. #6
    Join Date
    May 2016
    Location
    Plymouth
    Age
    43
    Posts
    159
    I can certainly vouch for coolant being flammable. Watch below from about 2:50. My fault I didn't have the cap on properly.

    https://www.youtube.com/watch?v=ayFlhtrDi10
    Granada based Pilgrim Sumo with RV8 - May 2017
    YouTube Build diary:
    https://www.youtube.com/channel/UCJnGMrv_CkERYzoG68enTGg

  7. #7
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    41
    Posts
    4,054
    Sorry James, I shouldn't laugh .. but I love the blow as the flames start! "I'll just .. er.. blow these out and oh crap that made it worse!"
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  8. #8
    Join Date
    May 2016
    Location
    Plymouth
    Age
    43
    Posts
    159
    Yes perhaps a bit optimistic but I was very reluctant to spray my powder extinguisher over my engine.

    Interestingly it did only burn momentarily and then just steamed a lot.

    As the exhaust wrap was soaked in coolant I am thinking that if I spray my new wrap it won't absorb any coolant so if this was to ever happen again and therefore it would not burst into flames?
    Granada based Pilgrim Sumo with RV8 - May 2017
    YouTube Build diary:
    https://www.youtube.com/channel/UCJnGMrv_CkERYzoG68enTGg

  9. #9
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    41
    Posts
    4,054
    It's not a bad idea - the sprays are (IIRC) water repellent too, so moisture doesn't stay trapped between the headers and in the tape, rusting things. As for the speed of combustion - I think the glycol decomposes pretty violently and rapidly, and then you're just left with the water to steam off - fortunately!

    Oil is more insidious as it takes a lot longer to burn and doesn't vapourise as readily..
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  10. #10
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    8,730
    Quote Originally Posted by aaronjb View Post
    It's not a bad idea - the sprays are (IIRC) water repellent too, so moisture doesn't stay trapped between the headers and in the tape, rusting things. As for the speed of combustion - I think the glycol decomposes pretty violently and rapidly, and then you're just left with the water to steam off - fortunately!

    Oil is more insidious as it takes a lot longer to burn and doesn't vapourise as readily..
    well, I've had oil on my headers from a leaky remote fitting...no fire, but shitty looking headers now
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

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