Spark plug thread repair

Discussion in 'PSI Superchargers Tech Questions' started by Danny Humphreys, Oct 4, 2008.

  1. Danny Humphreys

    Danny Humphreys Member

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    Is there a tool that can be used to repair spark plug threads with the head on the block?
     
    #1
    Danny Humphreys, Oct 4, 2008
  2. Mike Canter

    Mike Canter Top Dragster
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    #2
    Mike Canter, Oct 4, 2008
  3. secondwindracing

    secondwindracing top alcohol

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    #3
    secondwindracing, Oct 4, 2008
  4. Danny Humphreys

    Danny Humphreys Member

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    Can these be used with the heads on, between rounds if necessary?
     
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    Danny Humphreys, Oct 4, 2008
  5. Danny Humphreys

    Danny Humphreys Member

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    Never mind, just read the instructions, so for a veney head deal, ngk 6061-10 plug, which insert would you use? would you use aluminum or steel insert? why does it mak the egt read different? and what about the plug, does it read different?
     
    #5
    Danny Humphreys, Oct 4, 2008
  6. DQUES

    DQUES Member

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    I have never had to put a time cert in a plug hole but have used them for many other thread repairs , the best ! .
     
    #6
    DQUES, Oct 4, 2008
  7. Mike Canter

    Mike Canter Top Dragster
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    Dave, Time-Sert plug repairs do not change the EGT. If you use the original copper colored inserts then the reading of the fuel ring on the porcelein of a plug on a gasoline engine might read cooler. This applies to NA and nitrous cars on gasoline and not alcohol cars. The reason being is the insert changed the amount of heat transfer from the plug to the head. Now Time-Sert makes an optional insert material if one is worried about that problem. It is made out of aluminum so it transfers the same amount of heat.

    I have used the Time Sert to fix plug threads at the track and everyone should have a kit with them. The only problem I have ever had is that last time we had the heads worked on, and some of the cracks fixed, the guy put inserts in every plug hole which was OK but then I had some inserts back out and come out with the plug. I am positive that the insert was not installed correctly and was too high out of the hole. Time-Sert recommends a special Locktite that can stand up to heat and I put this inserts back in using this special Locktite and have had no further problems.
     
    #7
    Mike Canter, Oct 5, 2008
  8. craig moss

    craig moss Member

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    thread chaser

    I bought a chaser that looks like a concrete anchor with threads you put it in the hole and snug it up and find the good threads and back it out works great for track repairs I have seen them at napa 50 bucks
     
    #8
    craig moss, Oct 5, 2008
  9. secondwindracing

    secondwindracing top alcohol

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    Mike....thanks again...your the professor here:):)..Dave
     
    #9
    secondwindracing, Oct 6, 2008
  10. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    no steel

    just remember a steel insert can act like a glow plug....i recommend using aluminum insert if possible.
     
    #10
    Will Hanna, Oct 7, 2008
  11. Mike Canter

    Mike Canter Top Dragster
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    Will, I agree but one needs to make sure that they buy the correct length insert for the application. The insert should noy extend into the chamber ever.
     
    #11
    Mike Canter, Oct 7, 2008
  12. Deano

    Deano New Member

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    thread repair

    I used a back tap to fix mine also
     
    #12
    Deano, Oct 8, 2008
  13. Danny Humphreys

    Danny Humphreys Member

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    Did the repair tonite, took all of 5 minutes, i packed the flutes of the tap with grease to catch most of the filings and it worked great . Thanks guys!!
     
    #13
    Danny Humphreys, Oct 8, 2008

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