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Compression and leak down test kit

Discussion in 'Hawgz Garage' started by Chity_Avatar, Oct 11, 2013.

  1. Chity_Avatar

    Chity_Avatar Mows his grass in 8 minutes.

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    I am looking to get a complete test kit to test compression and do leak down test, both pressure and vacuum. Will a standard pressure leak down tester also work as a compression tester? My compression tester at work is a POS and I need to replace it.
     
  2. trx250r180

    trx250r180 The Junk Peddler

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    my snap on compresion tester i ,can use the 1 foot hose with spark plug hole fitting on it ,and hook an air hose to it to see if air runs out the intake or exhaust or down to the pan ,no guage to tell you how much if that helps at all ,i think they sell a leakdown tester also with a guage if you need to know how much the cylinder is losing for comparison of other ones
     
  3. Chity_Avatar

    Chity_Avatar Mows his grass in 8 minutes.

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    Just want to be able to test for external leaks like crank seals and base gaskets.
     
  4. trx250r180

    trx250r180 The Junk Peddler

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    like on a chainsaw ? you need to take the muffler and intake off ,a chunk of inner tube and a hose clamp will do the intake,or find something that fits down the intake tight and clamp it ,the exhaust i have seen a metal plate with 2 holes ,will need some kind of gasket or o-ring under it ,the engine builders may have a better setup ,but if you regulate an air hose down t like 5 or so psi it should show leaks without blowing the seals out ,the correct way may be hook a hand held vacuum pump up and create a vacuum and see if drops ,looks like no one working but us today ,maybe someone smarter will chime in ,i just normaly push on the seals ,if they not all soft and squishy ,just replace em they are cheap ,and on stihls can replace without splitting cases
     
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  5. Chity_Avatar

    Chity_Avatar Mows his grass in 8 minutes.

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    I have used them before just never had to buy one.
     
  6. BloodOnTheIce

    BloodOnTheIce ~Ice Gangsta~

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    I almost never use my vacuum/pressure tester in the shop.
    Very few saws, I work on have air leaks, and the ones that do are usually pretty obvious.
    I only use it to identify where the leak is coming from.

    My right arm, and pulling the muffler is all the compression testing I need.
     
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  7. Chity_Avatar

    Chity_Avatar Mows his grass in 8 minutes.

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    All very interesting but how about a saw that nees a top end and doesn't run to see if it has any leaks? How else would I be able to tell if it needed crank seals? The saw in question has crank seals that are hard to come by and if the seals leak then I don't see the point of fixing the top end.
     
  8. Adirondackstihl

    Adirondackstihl Photobucket Allstar

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    Mity-Vac makes a brake bleeder that will show vacuum and bar.
    Whats the saw in question?
    If seals are questionable, just replace em.
    You can use my Snap-On gauges whenever you want.
    maybe you'd like to buy them from me? Lol
     
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  9. Chity_Avatar

    Chity_Avatar Mows his grass in 8 minutes.

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    How much?
     
  10. Termitebuffet

    Termitebuffet For Meals

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