I am going to look at a fd to buy, and want to do a comp/test. Wanted to know what tools i need for that. thats all. Thank you

 

A telephone.

Make an appointment with a Mazda dealer, it's the easiest and cheapest way. This is one thing most dealers can get correctly.

Otherwise, you can get by with a standard compression tester and try to record the three values as the needle spikes up and down at 250 times/minute.

Dave

 

If the guy who owns it lets me i well take it to the dealer i work at, that way i have all my tools there and can put it on the lift. I would rather do it my self personally. But thanks

 

What he meant is that the Mazda dealer has the digital compression tester. You can use a standard compression tester, although not as accurate. You need to have the engine warm and hold down the check valve release, and use the table in the FSM to compensate for cranking speed. Read up on it, there's info on it everywhere.

By the way, which Audi(s) do you own?

 

Thanks for letting me know the little trick on how to do it, but what size are the plugs, 3/4? and do i need any other tools to get to them. I was wanting to do this at his place, and wanted to bring all I needed with me. I do not own any audi's sorry, just work on em. And i get to drive all kinds all day long. So its kinda better then owning one...

 

you'll have to take off the small valve off from the compression test, that looks like the one found on the tire valve stems.

use a small ratchet and a 3/4 spark plug socket to get to either one of the plugs on each rotor..