White smoke and cold start ups
I bought a rx7 1987 n/a 161 original miles and for one it was really cold about 9 -10 pm at night I tryed to start it and it wouldn't turn over and so I stopped (wasn't trying to flood it or ruin it cause i don't know much about rotarys) next morning started up just fine no problem but there was a lot of white smoke for like 4 - 7 min coming from the exhaust but stops after? What can this mean? Did I just buy a car with a broken coolant seal or broken apex seal ?
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its fine when its real cold and right at the first start/cold engine. also if you can see steam coming out the exhaust and the engine is warmed up, then check if you can also see your breath. if you can see your breath its ok.
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Originally Posted by sp0ngebob
(Post 11650342)
its fine when its real cold and right at the first start/cold engine. also if you can see steam coming out the exhaust and the engine is warmed up, then check if you can also see your breath. if you can see your breath its ok.
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Doesn't sound like something you should worry about keep an eye on your gauges and if it seems to run fine then your all good buddy
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If the smoke is white and does it everytime you start it plus overheat then you blew the coolant seals but it doesn't sound like that. Higher mileage rotary engines usually have worn side seals on each rotor and when the engine is cold oil slowly seeps past them then when the engine is started it burns it off and that's where the smoke comes from until the engine is warmed up and the seals expand and seal the area the smoke will stop but like I said before if the smoke keeps continuously coming out of the exhaust even when fully warmed up then your side seals are shot. It also could just be unburnt fuel in the exhaust if the last time you drove the car you didn't let the car warm up and then shut it off. The engine will flood and you need to deflood it. If you gotta deflood it on an S4 pull the EGI fuse and lower spark plugs and crank the engine for 5 secs a few times then clean the plugs, put a small amount of oil into the lower spark plug holes, put the fuse and plugs in and it should start. S5 just floor the pedal with the car off then stop and try to start it. Usually works. Also could use a fuel cut defenser. You need to learn rotaries just read boy
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theres a bunch of ways to identify a blown coolant seal. the biggest is the volcanic eruption of coolant out the rad cap when idling cold with the cap off.
this doesnt really sound like that |
Originally Posted by cab91089
(Post 11650993)
... but like I said before if the smoke keeps continuously coming out of the exhaust even when fully warmed up then your side seals are shot. You need to learn rotaries just read boy
Originally Posted by sp0ngebob
(Post 11651560)
theres a bunch of ways to identify a blown coolant seal....
https://www.rx7club.com/new-member-r...-idle-1051067/ To the OP: What you're likely seeing is condensation within the exhaust being expelled as steam as the system heats up. Unless it's really cold, it usually stops after a few minutes after it's dry. Coolant being consumed with the combustion event (as from a failed coolant seal) will also appear as steam out the tailpipe, but it will have a distinct, slightly sweet odor....and almost always accompanied by other symptoms (see link above). |
Originally Posted by cab91089
(Post 11650993)
If the smoke is white and does it everytime you start it plus overheat then you blew the coolant seals but it doesn't sound like that. Higher mileage rotary engines usually have worn side seals on each rotor and when the engine is cold oil slowly seeps past them then when the engine is started it burns it off and that's where the smoke comes from until the engine is warmed up and the seals expand and seal the area the smoke will stop but like I said before if the smoke keeps continuously coming out of the exhaust even when fully warmed up then your side seals are shot. It also could just be unburnt fuel in the exhaust if the last time you drove the car you didn't let the car warm up and then shut it off. The engine will flood and you need to deflood it. If you gotta deflood it on an S4 pull the EGI fuse and lower spark plugs and crank the engine for 5 secs a few times then clean the plugs, put a small amount of oil into the lower spark plug holes, put the fuse and plugs in and it should start. S5 just floor the pedal with the car off then stop and try to start it. Usually works. Also could use a fuel cut defenser. You need to learn rotaries just read boy
1987 rx7 N/A 161k |
Last off topic question all my gauges work except my oil pressure . Is there way I can fix it ? With out replacing the whole thing?
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Sgt.Blue I made a mistake I know worn or blown side seals results in low compression and oil being mixed with fuel. I actually meant the oil control rings not side deals, my fault.
N00bAtEverything did you cheak to make sure that the wire is hooked up to the sensor? It only slides on and clips in place and can fall off once in awhile especially if you were working in that area. The sensor is near where the fuel lines go into the hard lines, kinda near the oil filter. |
Originally Posted by cab91089
(Post 11652869)
Sgt.Blue I made a mistake I know worn or blown side seals results in low compression and oil being mixed with fuel. I actually meant the oil control rings not side deals, my fault.
N00bAtEverything did you cheak to make sure that the wire is hooked up to the sensor? It only slides on and clips in place and can fall off once in awhile especially if you were working in that area. The sensor is near where the fuel lines go into the hard lines, kinda near the oil filter. |
Originally Posted by cab91089
(Post 11652869)
Sgt.Blue I made a mistake I know worn or blown side seals results in low compression and oil being mixed with fuel. I actually meant the oil control rings not side deals, my fault.
N00bAtEverything did you cheak to make sure that the wire is hooked up to the sensor? It only slides on and clips in place and can fall off once in awhile especially if you were working in that area. The sensor is near where the fuel lines go into the hard lines, kinda near the oil filter. 1987 rx7 N/A 161k |
Wow, no oil at all? Sounds like he was trying to have you blow the engine on the way home. I just bought an Escort GT a town over from where I live and I drove it home (with no brakes) and I kept hearing a slight pinging noise so when I got home I checked the oil level and it was bone dry. That really got me mad, the guy really couldn't tell me he drained the oil? I would've brought some with me if I knew that and luckily I didn't blow the engine or he'd have refunded me the money. I will look for a picture of the wire on the sensor so you can see exactly what I'm talking about.
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Originally Posted by cab91089
(Post 11655796)
Wow, no oil at all? Sounds like he was trying to have you blow the engine on the way home. I just bought an Escort GT a town over from where I live and I drove it home (with no brakes) and I kept hearing a slight pinging noise so when I got home I checked the oil level and it was bone dry. That really got me mad, the guy really couldn't tell me he drained the oil? I would've brought some with me if I knew that and luckily I didn't blow the engine or he'd have refunded me the money. I will look for a picture of the wire on the sensor so you can see exactly what I'm talking about.
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Originally Posted by cab91089
(Post 11655796)
Wow, no oil at all? Sounds like he was trying to have you blow the engine on the way home. I just bought an Escort GT a town over from where I live and I drove it home (with no brakes) and I kept hearing a slight pinging noise so when I got home I checked the oil level and it was bone dry. That really got me mad, the guy really couldn't tell me he drained the oil? I would've brought some with me if I knew that and luckily I didn't blow the engine or he'd have refunded me the money. I will look for a picture of the wire on the sensor so you can see exactly what I'm talking about.
Apparently you don't check oil level any more often than he did....so why would he have refunded you the money? Caveat Emptor |
Originally Posted by N00bAtEverything
(Post 11656621)
Right ? If I woulda found that out on the freeway I woulda been pissed . But luckly it just so happen I decided to check the oil when I put some gas in (I hardly ever check while pumping gas) and it was like a literally drop on the dipstick of oil. Lucky me the gas station had a carquest next door. And thank you for the picture ! Much appreciated . I also found out that he took the a/c as i found the all the components to put it back behind my seat in the glove boxes
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Originally Posted by Sgtblue
(Post 11657019)
You bought a car and didn't check the oil? :scratch:
Apparently you don't check oil level any more often than he did....so why would he have refunded you the money? Caveat Emptor |
It's just had some fuel in it from trying to fire it the night before and it was burning off the extra
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Originally Posted by johnnyy07
(Post 11666380)
It's just had some fuel in it from trying to fire it the night before and it was burning off the extra
Put some new gas in it and maintenance the motor with some gtx non synthetic 10-40 and youll be set, I just bought a gxl and it did the same now shes fine. |
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