erikthegoalie

iTrader: (29)

I know some people use TDC, how bout the air in the combustion chamber?

What tool is need to screw the air tool into the spark plug hole?

Thanks!
Erik

Kryckter

iTrader: (4)

I use the air in the chamber way. I find it the easiest, and safest. The tool I use is the hose section of a compression tester. I just pulled out the schraeder valve to allow the air to freely flow through. Set the compressor to around 60 PSI and you are good to go.

mzoomora

iTrader: (36)

X2. It is the most reliable. Just loosen the rockers first, that way both valves are closed.

erikthegoalie

iTrader: (29)

Cool, where can one of these compression test kits be found/rented?
Also, wont the rockers already be off? Or do I put in the compressed air BEFORE removing the rockers?

Thanks fellas!

Erik

bjamick

iTrader: (31)

My friend had this rubber hose that screwed into the spark plug hole and then we hooked up the air compressor to it and it kept the valves up. Not for sure where he got it from though.

erikthegoalie

iTrader: (29)

that is the lead I was looking for...LOL...<sarcasm>
seriously though, see if you can see where he got it

mzoomora

iTrader: (36)

Buy a Harbor Freight or Auto Zone compression tester. Remove the schrader valve that is by the spark plug thread side of the hose and you are done. The end of the hose that goes into the gauge fits on a compressor hose.

mzoomora

iTrader: (36)

http://www.harborfreight.com/cpi/cta...emnumber=92720

erikthegoalie

iTrader: (29)

Cool thanks man...

Hey one more thing:
When you are chaging seats and seals, doesn't this put a lot of pressure on the valves? We are installing patriot duals, that is why I ask.

How bout TDC, is that harder to figure out?

Ericbigmac83

iTrader: (19)

I personally found the top dead center method easier. Saves a lot of time compared to using the compressor in my opinion. For the first one i held the valve up with a pen magnet and rotated the engine until the piston came up. Then i just went from there, 2 pistons at a time, rotate 1/4 turn, do the two other pistons, and so on

99blancoSS

iTrader: (115)

Napa. I rent it out with my cam tool package. No need to rape a compression tester, they sell the hose! at NAPA

mzoomora

iTrader: (36)

Thats true, but a compression tester isnt a bad tool to have, or even better a leak down tester.

99blancoSS

iTrader: (115)

Yep, I have a compression tester as well.... guess who from..lol NAPA's tools arent that bad actualy

98RedZone

iTrader: (1)

I used tdc. I don't see what is unsafe about it at all.

mrr23

iTrader: (3)

i use this air hose and adapter, along with the spring tool

http://vincihighperformance.com/TOOL...NT%20PAGE.HTML

Krab

iTrader: (28)

I also find TDC method much easier. Dot to dot, cylinders 1 & 6 are at TDC, rotate crank 90º clockwise, cylinders 8 & 5 are at TDC, rotate crank 90º clockwise, cylinders 7 & 4 are at TDC, rotate crank 90º clockwise, cylinders 3 & 2 are at TDC. This way, there's no way of dropping a valve, it'll only fall ~.25" then the piston will stop it in its tracks. I've tried the compressed air method and it was kind of a pain to get the hose threaded into the spark plug hole.

erikthegoalie

iTrader: (29)

everyone thanks!

Krab, your answer was godsent!
Erik

2000Hawk

iTrader: (5)

I found the air compressor method to be very useful. I got my self the craftsman compression tester, then i screwed the hose into a spark plug hole ythen just connect the air compressor to it. Yeah its a pain in the *** at first trying to get the hose to bend and spin at the same time. But after a few tries i did it with no problem. I did the #8 through the bottom since reach through the top is damn near impossible. Then with the air pressure set i would tap the retainer a bit to nudge it from the locks then with me Crane Cams spring compressor i would just push to springs down slowly to make sure the retainers weren't still stuck to the locks. The TDC method isn't bad if you have no means of an air compressor, so you can still use that method.
-Joel

trigger1

iTrader: (28)

The air compressor method is nice...when dealing with the cylinders toward the front of the car. The rear cylinders are a PITA to get the hose to. As for the seats/seals with the air method you will be fine. Also, to answer your question, if you are swapping cams you should have already removed the rockers at this point.

Cobra4B

iTrader: (9)

I've used both... but w/ a vette the PS rack is in the way so the air method is easier. When putting my cam in I just used the TDC method.