Interesting! I think I have 2 I got at a yard sale. Even came with a tool to change the valve.
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| A note about compression testers...... https://slantsix.org/forum/viewtopic.php?t=22810 |
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| Author: | emsvitil [ Fri Apr 20, 2007 12:35 pm ] |
| Post subject: | A note about compression testers...... |
I've noticed a few posts on compression lately and thought I'd make a reminder on compression testers........ Are you sure it's reading correctly? And it's just not the gauge you need to worry about. Compression testers use a schrader valve (tire valve core) to capture the pressure. It takes a certain amount of pressure to open that valve which will lower the reading on your gauge by that amount.... (Once upon a time my gauge started leaking and I replaced the valve to find the readings went down by 25psi, which is how I found this out........... (swapped in another valve which didn't take so much pressure to open up)) |
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| Author: | Rug_Trucker [ Sun Apr 22, 2007 4:56 pm ] |
| Post subject: | |
Interesting! I think I have 2 I got at a yard sale. Even came with a tool to change the valve.
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| Author: | VDART [ Sun Apr 22, 2007 5:55 pm ] |
| Post subject: | c-testers |
also I believe the starter spinning torque will have an effect on the compression---- faster spin higher torque-- my guess as to why it is more important to have equal numbers vs high numbers |
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| Author: | Ron Parker [ Sun Apr 22, 2007 7:35 pm ] |
| Post subject: | |
To do a correct compresion test one must remove all the sparkpulgs and open the carb plates some. A good compression guage is a must. Ie Snap On Mac or Crfastman. With all plugs removed turn the engine over until the max compression is reached. Rotate the engine until it reach the max psi. Thanks Ron Parker  Im A Hokie |
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