It's alive!!!!!!!!!
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 283
Likes: 0
From: Colorado
It's alive!!!!!!!!!
After over six years my April 1978 spark yellow GS Rx7 started right up with a little choke and a bit of smoke. Hoping the smoke is from the liberal use of Vaseline as engine assembly lube.
Now all I need to do is: Finish the brakes, Install the front bumper, rear hatch, windshield, wipers, padding, carpeting, console, seats, dead pedal. Grease every zerk, align the front end, paint wheels, find good tires. And, most importantly figure out the issue with the back axle.
Yahooo!
Now all I need to do is: Finish the brakes, Install the front bumper, rear hatch, windshield, wipers, padding, carpeting, console, seats, dead pedal. Grease every zerk, align the front end, paint wheels, find good tires. And, most importantly figure out the issue with the back axle.
Yahooo!
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 283
Likes: 0
From: Colorado
Spoke Too Soon
Well, after starting it for the first time I am unable to repeat the results. Cranks over fine and seems to almost catch but not quite. Moved the timing forward and back a bit. Fuel pump seems to be working OK. Noticed some gas is appearing in the little plastic tray under the carb.
Looking for ideas. I'm at a loss.
Herb
Looking for ideas. I'm at a loss.
Herb
Trending Topics
Well, after starting it for the first time I am unable to repeat the results. Cranks over fine and seems to almost catch but not quite. Moved the timing forward and back a bit. Fuel pump seems to be working OK. Noticed some gas is appearing in the little plastic tray under the carb.
Looking for ideas. I'm at a loss.
Herb
Looking for ideas. I'm at a loss.
Herb
Mix fire with fuel and oxygen and you get combustion. Normally you check for spark and fuel first. Find out which one you lack and start focusing on that.
Did you rebuild that carb? Did you keep the old needles and seats? Is the vent solenoid working?
Sounds like you have a flooded rotary to me. Try the deflood procedure and/or new plugs as well and
see how it goes. If it ran once it will again.
Sounds like you have a flooded rotary to me. Try the deflood procedure and/or new plugs as well and
see how it goes. If it ran once it will again.
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 283
Likes: 0
From: Colorado
Smoking and backfiring.
Got the 79 running after following the flood protocol. Unfortunately, it's smoking even after running for 10 - 15 minutes. Also running rough and very rich. How long should it take to stop smoking from the ATF and the Vaseline? Ideas on why it's running so rich?
Herb
Herb
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 283
Likes: 0
From: Colorado
Damn, it did start!
Joined: Feb 2001
Posts: 2,771
Likes: 470
From: washington
I have not rebuilt before either, but as I understand it. There will be a seating in period. especially if you were using used housings and irons. I shall assume that you used new head seals and used Irons and housings.
Would anyone with real experience with fresh rebuilds chime in?
Would anyone with real experience with fresh rebuilds chime in?
Damn, it did start!
Joined: Feb 2001
Posts: 2,771
Likes: 470
From: washington
What to expect after the rebuild.
Started this thread in the general rotary forum. Hopefully we can get some knowledge shared. I am planning on rebuilding here in the next year also.
https://www.rx7club.com/general-rota.../#post12195843
https://www.rx7club.com/general-rota.../#post12195843
Couple of basic things Herb:
-check rad for an oil skim that would indicate failure to seal coolant from combustion
-is it easy to start at least? engines with coolant/seal failures are usually pretty hard to start
-is the exhaust oil-based, or coolant-based? The smell of coolant from exhaust is distinctive. And you usually get a finger-swab of coolant/liquid at the tailpipe.
-compression up to snuff? Mazda dealer can run a compression test. That will tell you a lot.
I rebuilt mine last year. And am doing the install now. Fingers crossed!
Stu Aull
80GS
Alaska
-check rad for an oil skim that would indicate failure to seal coolant from combustion
-is it easy to start at least? engines with coolant/seal failures are usually pretty hard to start
-is the exhaust oil-based, or coolant-based? The smell of coolant from exhaust is distinctive. And you usually get a finger-swab of coolant/liquid at the tailpipe.
-compression up to snuff? Mazda dealer can run a compression test. That will tell you a lot.
I rebuilt mine last year. And am doing the install now. Fingers crossed!
Stu Aull
80GS
Alaska
Thread Starter
Senior Member
Joined: Sep 2009
Posts: 283
Likes: 0
From: Colorado
Couple of basic things Herb:
-check rad for an oil skim that would indicate failure to seal coolant from combustion
-is it easy to start at least? engines with coolant/seal failures are usually pretty hard to start
-is the exhaust oil-based, or coolant-based? The smell of coolant from exhaust is distinctive. And you usually get a finger-swab of coolant/liquid at the tailpipe.
-compression up to snuff? Mazda dealer can run a compression test. That will tell you a lot.
I rebuilt mine last year. And am doing the install now. Fingers crossed!
Stu Aull
80GS
Alaska
-check rad for an oil skim that would indicate failure to seal coolant from combustion
-is it easy to start at least? engines with coolant/seal failures are usually pretty hard to start
-is the exhaust oil-based, or coolant-based? The smell of coolant from exhaust is distinctive. And you usually get a finger-swab of coolant/liquid at the tailpipe.
-compression up to snuff? Mazda dealer can run a compression test. That will tell you a lot.
I rebuilt mine last year. And am doing the install now. Fingers crossed!
Stu Aull
80GS
Alaska
How much smoke are we talking?? I think you should give it some time. I've done MMO treatments that will cause the engine to smoke for some time. Run it for a bit and see if the smoke thins out at all.
