
If it's only 0 to 100 PSI it seems pretty limited for automotive engine compression testing.I've got a small engine that's being a pain in my *** right now and I've checked everything but compression or valvetrain. I might tear the head apart before this gets here. Pros: cheap (you can save a few bux going w/a lower rated seller), cons: aluminum fittings, yuck:
edit: I may hold off on this one for now. Looks like since this is a rebadge engineering job, Briggs got the specs wrong in the manual for idle rpm. I found the Mitsubishi manual now & it's likely running at the correct rpm.
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Likely bought a pallet or container of them for scrap value when True Value went under.I do not understand how they can make enough money for that to be worth even selling.
that's a good catch. I was hoping to avoid buying just a compression tester....though I found them as cheap as 13$. Are leakdown tests done at lower pressures or this kit geared more for small engines?If it's only 0 to 100 PSI it seems pretty limited for automotive engine compression testing.
I think a lot of these amazon stores go under or they must get rid of inventory that's not moving because storage is killing them. Their loss our gain type of scenario.Likely bought a pallet or container of them for scrap value when True Value went under.










Reading the description closer this time.... it says" compression LEAKAGE tester" and the gauges would seem to support that rather than just a compression tester. Beyond that, I don't know anything more.that's a good catch. I was hoping to avoid buying just a compression tester....though I found them as cheap as 13$. Are leakdown tests done at lower pressures or this kit geared more for small engines?
I made my own leakdown tester decades ago...If it's only 0 to 100 PSI it seems pretty limited for automotive engine compression testing.
A leak down tester is probably a more suitable tool for evaluating the condition of an engine than a compression tester anyway.I made my own leakdown tester decades ago...
It may be labeled as a compression tester, but its not. It's a leak down tester. Typically you would put 100psi of air in the cylinder at tdc and the other gauge would read the leakage. Because the 2nd guage is in % it doesn't really need the full 100psi. But if you use a 2nd gauge with psi, its much easier to figure out the % leaking if the air input is at 100psi.
I figured leak down testers could do double duty by using the high side connected to the sparkplug hole if the gauge read high enough? Looking at the more expensive ones, it looks like they all top at 100psi so I might be wrong. I guess one could swap gauges but it doesn't look like these have the quick pressure release valve of comp testers.I made my own leakdown tester decades ago...
It may be labeled as a compression tester, but its not. It's a leak down tester. Typically you would put 100psi of air in the cylinder at tdc and the other gauge would read the leakage. Because the 2nd guage is in % it doesn't really need the full 100psi. But if you use a 2nd gauge with psi, its much easier to figure out the % leaking if the air input is at 100psi.

The same Master Mechanic tool set is on Amazon, for the same $45.** price. Can’t find the link though, since I’m incompetent.Guys, this is an Amazon deals thread. Please leave the eBay stuff elsewhere.
I got intrigued, bought the drums and the HF surface conditioning/burnishing tool. HF had both reincarnations of exactly the same tool: the older (orange) one on closeout for $50, but conveniently absent in all nearby stores. So I got Hercules (blue) which was about $100-$120 on sale.Heh.
I am working on a solution for this as well. There's limited space for movement between the tool body and the guard, but probably enough. I am also looking to cut and add a strip, but if that does not work, I may model one up and 3D print some in ABS. Then it could be shaped around the tool body.
You beat me to the punch!I got intrigued, bought the drums and the HF surface conditioning/burnishing tool. HF had both reincarnations of exactly the same tool: the older (orange) one on closeout for $50, but conveniently absent in all nearby stores. So I got Hercules (blue) which was about $100-$120 on sale.
The maximum amount you can move the guard radially away from the spindle is slightly less than 0.100" before it hits the tool body.
Here is what I had to do to allow the most common 4.7" dia drums to fit in.
You're right. I should've started a new post. Sorry!Sure do wish this thread could stick to deals rather than tool modification discussions.
A new thread would lack the "deal" context that this thread provides. Better that those who actually bought the oversized abrasive drums (I bought 6) see the fix here, IMO.You're right. I should've started a new post. Sorry!
Maybe the moderator can do it at this pont.
Don’t delete or move this helpful post……… I have one of these surface conditioners that needs parts that may or may not fit so I appreciate the helpful modification posts.You're right. I should've started a new post. Sorry!
Maybe the moderator can do it at this pont.

Sure do wish this thread could stick to deals rather than tool modification discussions.
Nobody should post helpful information about the deals mentioned here that would be hugely beneficial to those who bought the item. This is a deal thread. Get off my lawn!

I think deals is deals and if you can show us how you make your deal work for others it's a deal imo. I honestly don't get the "don't post a better or comparable deal" in this deals thread.You're right. I should've started a new post. Sorry!
Maybe the moderator can do it at this pont.
I hope you don't take this the wrong way but there's a quick fix for you and others:I wish this thread was limited to mostly deals. There are lots of places to have extended discussions, and many deserve their own thread, like the surface conditioner got. In a month or two, it will be very hard to search for drum or non-compression tester stuff on this thread, because it’s so long.




