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Old 09/12/2011, 12:17 AM   #1
Iowan82
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Wrench help? 85' Rx7

So im getting this Rx7 its an 85' and i don't quite know whats wrong with it all i know is that its been sitting for 10 yrs and the only reason it was sitting was because his daughter lost the key and the breaks started going out then i looked under the hood and the mechanic reports he got a tune up in 2001 has a brand new air filter. some cosmetic stuff is wrong but i planned on ripping everything out anyways. but the engine starts to turn and stops then the battery line starts to glow red hot. obviously the power is running back to the battery but i don't understand i feel like the block isn't lubed up enough so if u have any feed back let me know!

Btw im getting the rx7 for free so please don't call me a dumbass haha

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Old 09/13/2011, 12:00 AM   #2
lulzcow
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Default Re: help? 85' Rx7

I don't know too much but I'd guess checking your grounds, then battery capacity.

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Old 09/13/2011, 12:15 AM   #3
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Default Re: help? 85' Rx7

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Originally Posted by lulzcow View Post
I don't know too much but I'd guess checking your grounds, then battery capacity.
Ya its going to have to be a big project ill probably redo all the wiring but i feel like thats not the only thing ill be redoing hopefully it won't be a full engine restore...that would be difficult but not to bad.

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Old 09/14/2011, 10:42 PM   #4
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Default Re: help? 85' Rx7

Good luck! If it helps any, try figuring out exactly which wires are heating up, and replacing those. maybe they are corroded and providing too much resistance.

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Old 09/14/2011, 11:28 PM   #5
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Default Re: help? 85' Rx7

How long do you hold the key in the start position after it stops turning? Hold it for any period of time if its not turning, and it will fry something.



Sitting for 10 years? expect a rebuild soon if not immediately.

Pull the spark plugs. Spray fogging oil down in the holes. If you want to do it right, pull of the exhaust manifold and spray fogging oil into the exhaust ports of the motor.

Theres a big nut on the front of the main pulley. Get a socket, and a ratchet on that. Turn the motor. Does it turn smoothly with the spark plugs out? If not, try to work some more oil around inside the motor. Still no luck? Full rebuild.

Get it spinning smoothly? Compression test it. anything south of 85psi is no good.


Hate to say it, but very few of these motors can take sitting for any long period of time with no maintenance(running oil through the engine every month or two). Guys that get a motor running that has been sitting, usually have to rebuild it shortly after.


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Old 09/16/2011, 11:18 AM   #6
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Default Re: help? 85' Rx7

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Originally Posted by nate91242 View Post
How long do you hold the key in the start position after it stops turning? Hold it for any period of time if its not turning, and it will fry something.



Sitting for 10 years? expect a rebuild soon if not immediately.

Pull the spark plugs. Spray fogging oil down in the holes. If you want to do it right, pull of the exhaust manifold and spray fogging oil into the exhaust ports of the motor.

Theres a big nut on the front of the main pulley. Get a socket, and a ratchet on that. Turn the motor. Does it turn smoothly with the spark plugs out? If not, try to work some more oil around inside the motor. Still no luck? Full rebuild.

Get it spinning smoothly? Compression test it. anything south of 85psi is no good.


Hate to say it, but very few of these motors can take sitting for any long period of time with no maintenance(running oil through the engine every month or two). Guys that get a motor running that has been sitting, usually have to rebuild it shortly after.
Ya i expected a rebuild and everything but i didn't know about the fogging oil. Im not getting the car for another week or so. Hopefully i can get everything done first do u know what im looking at for the rebuild price wise? Also how do u check the PSI?

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Old 09/18/2011, 08:32 PM   #7
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Default Re: help? 85' Rx7

If you have to ask, consider selling before the car ruins you.


Now do your research.

http://www.rx7club.com/


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Old 09/20/2011, 01:04 AM   #8
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Default Re: help? 85' Rx7

Sitting for 10 years will= dried apex seals as well.

You could try ATF, pull the trailing plugs, squirt some in each hole,
Try starting with the plugs out, to get the rotor to go, pushing out excess ATF
while trying to lube the seals and get them to expand, but dont do this alot
after a couple times if it doesnt help its not going to work, the more ATF the faster your plugs will
go, till all the ATF burns out. Also check the make sure they have the right plugs in the right holes, leading and trailing, as for the battery im not sure could be many things, bad wiring, a short, who knows. And make sure you flush the fuel system, clean the tank, yada yada the normal shit you do
when you get a car thats been sitting a long time.


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Old 09/21/2011, 11:38 PM   #9
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Default Re: help? 85' Rx7

Apex seals are a metal, they don't really dry out so to speak. The soft seals in the motor(oil control rings and coolant seals) will do what you're saying.


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Old 10/08/2011, 11:35 PM   #10
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Default Re: help? 85' Rx7

4g63 swap


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Old 10/16/2011, 12:08 AM   #11
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Default Re: help? 85' Rx7

Quote:
Originally Posted by mattcossel29 View Post
4g63 swap
And make a RX-7 less reliable?



ex-dsmer here lol.


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Old 10/17/2011, 07:48 AM   #12
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Default Re: help? 85' Rx7

Just go SBF/SBC that what i did :P make sure you got the 4.10 LSD or your fucked haha


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