Mazda_Power

iTrader: (3)

Hello all. It's been a long time. I bought my car back in 2005 wrecked and without an engine. College and life came along so there was no time or money to put the RX7 back together until now. I ended up buying a front clip. First off since I don't know/trust the last time it was started is there anything I should do? I'd like to start it up in the clip and do a compression test since I have a few suspicions about the engine. Looks like an GReddy/HKS single turbo kit with a vmount. Turbo is a TD06 25G. Not my first choice, but will work for now. Sorry for being a bit long winded, but I'm excited about my car for the first time in years. I've heard ATF... Marvel Mystery oil... fresh engine oil.. Anyone tried anything that's worked better than anything else?

Edit. I get a kick out of the ground kit they installed in JDM land.

Project88Turbo

iTrader: (22)

First thing I'd do is make sure it turns over with socket on the crank bolt. I'd squirt some 2 stroke oil into the chambers and rotate the engine several times. Then do a compression test. If the compression test looks good proceed.

Next, sell me that SWEET triangulated strut tower brace!

Looks like you got some sweet goodies with the clip though!

Vince

Gilgamesh

some JDM would be worthless if they had a coolant seal failure and sat for year.

if they wont do a simple compression test then its not worth the risk. otherwise your buying a blown motor with parts.

i would try to boroscope and see whats inside. but it being inside the clip is a little more difficult than pulling off the turbo and looking in the exhaust ports

Mazda_Power

iTrader: (3)

Sounds good. Is there a good way to test compression with a typical compression gauge?

Gilgamesh

yea, youtube it to get a better idea.

its not THE ABSOLUTE BEST way.... but you can quickly determine health by it.

IRPerformance

iTrader: (41)

Do what Project88Turbo said. Change ALL the fluids in the car (oil, coolant, trans, diff, brake fluid) Pull the egi fuse and crank the motor for 10 seconds at a time 3 times to build some oil pressure. Then try to start it. You need the engine to be at operating temperature for an accurate compression test. If it won't start, then you can do a test to at least see if you have compression. That won't tell you if you have a coolant seal failure. Only a coolant system pressure test or time will. JDM motors are junk for anything except spare parts. 9 times out of 10 I see something wrong with them.

Rx7aholic

iTrader: (22)

Hey like everyone said above do it, btw make sure when u change the coolant u removed the engine drain plug on the side. I happen to buy jdm clip about 1.5 years and I ran the clip for couple of days, the trick I did was use my old fuel pump, and buck of gas, submerge the pump and hook up the 2 fuel line, one for injector and other return, i can run it like that until gas was empty from the bucket. I had post some parts for sale last year and I believe the video was on it, do a search under my name, I though I have it on my laptop but it had crash twice so i lost all of my info. Also when i did my compression with the Mazda tester, I got 9.2, 9.3, 9.5 ft, rear 9.3,9.5, 9.6 r, so you never know

Rx7aholic

iTrader: (22)

VIDEO0022 - YouTube
I found it.
http://www.youtube.com/watch?v=-Pcgh...ature=youtu.be

IRPerformance

iTrader: (41)

I had a JDM engine with over 100k miles that still had compression between 95 and 100 psi on all faces. My customer wanted to single turbo it but I convinced him to let me tear down the motor and look it over. Good thing because the water jacket on the front iron was cracked through and the coolant seal would have failed in a very short amount of time. You could have great compression, but still have a coolant seal or oil ring issue.