white smoke
03-22-23, 09:06 PM
#1
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white smoke
hey guy I have a rx7 1988 when I turn her on she blows white smoke alot I think it might be the apex seals but I dont feel less power but I also think it could be my coolant seals on my engine. Could someone help me out
03-26-23, 11:25 PM
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I had the same issue, the longer it sat between starting the more white smoke it would poor out. I pulled the engine down and it was a coolant leak. If yours is doing the same then you should look into coolant leak issues.
03-31-23, 08:18 AM
#7
welcome to the board. 
as has been said already, it's probably your coolant seals.
other things to use to confirm are:
- coolant loss (with or without signs of a leak),
- sweet-smelling exhaust while smoking,
- excess pressure in the cooling system while the engine is running,
- exhaust (combustion products) in the coolant,
- coolant in the chambers (remove the exhaust manifold and turn the engine by hand),
- coolant in your oil and/or vice versa.
keep in mind, they don't all have to be present.
as has been said already, it's probably your coolant seals.
other things to use to confirm are:
- coolant loss (with or without signs of a leak),
- sweet-smelling exhaust while smoking,
- excess pressure in the cooling system while the engine is running,
- exhaust (combustion products) in the coolant,
- coolant in the chambers (remove the exhaust manifold and turn the engine by hand),
- coolant in your oil and/or vice versa.
keep in mind, they don't all have to be present.
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03-31-23, 09:00 AM
#8
Rotary Enthusiast
wait... I had an FC with 170k. would smoke like the devil when you first started it up.... ran strong...even the rx7 guy I sold it to was impressed.
oil rings I think i was tp;d...but it had no bearing on the engine other than burning some oil.
oil rings I think i was tp;d...but it had no bearing on the engine other than burning some oil.
03-31-23, 06:35 PM
#9
Even when building an engine, compression seal gaps can be loosened to allow for higher temps and power in trade off for burning oil.
Sure the engine might smoke like crazy when cold with blown coolant seals, then stop smoking when warm and still have the same power level, but internal deterioration is occurring. The same is not said about oil seals.
I just wanted to make this clear to not mislead the OP.
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diabolical1 (03-31-23)
03-31-23, 08:09 PM
#10
Rotary Enthusiast
I understand why you said this, but this is not the same trade-off scenario. Burning oil is less detrimental than burning coolant. Burning coolant can obviously lead to overheating, but also deterioration of the irons. Either a coolant seal has broken and/or the iron has worn/eroded.
Even when building an engine, compression seal gaps can be loosened to allow for higher temps and power in trade off for burning oil.
Sure the engine might smoke like crazy when cold with blown coolant seals, then stop smoking when warm and still have the same power level, but internal deterioration is occurring. The same is not said about oil seals.
I just wanted to make this clear to not mislead the OP.
Even when building an engine, compression seal gaps can be loosened to allow for higher temps and power in trade off for burning oil.
Sure the engine might smoke like crazy when cold with blown coolant seals, then stop smoking when warm and still have the same power level, but internal deterioration is occurring. The same is not said about oil seals.
I just wanted to make this clear to not mislead the OP.
does the smoke go away after warmed up?
04-22-24, 08:43 PM
#11
Full Member
Tons of white smoke
Hi, the first time white smoke occurred on my 88 GXL was when I first had a flooding issue.
After finally starting, there was so much white smoke that it poured out of my garage and drifted down the street!
The next time it occurred was at the Mazda dealership when trying to restart my car after doing some maintenance, white smoke filled the entire shop area!
After many years it occurred to me that the only thing that causes white smoke is "coolant".
So, somehow when trying to restart the engine and it floods due to low compression, that pushing on the throttle pedal somehow gets the sub-zero system to inject it's 90/10 antifreeze mix into the engine!
My thoughts are that if the engine starts normally and you have white smoke, there is a minor coolant seal leak that occurs after engine shutdown. A heat soak condition that pushes some coolant into the engine after shutdown if there is a small failure in the coolant seals.
After finally starting, there was so much white smoke that it poured out of my garage and drifted down the street!
The next time it occurred was at the Mazda dealership when trying to restart my car after doing some maintenance, white smoke filled the entire shop area!
After many years it occurred to me that the only thing that causes white smoke is "coolant".
So, somehow when trying to restart the engine and it floods due to low compression, that pushing on the throttle pedal somehow gets the sub-zero system to inject it's 90/10 antifreeze mix into the engine!
My thoughts are that if the engine starts normally and you have white smoke, there is a minor coolant seal leak that occurs after engine shutdown. A heat soak condition that pushes some coolant into the engine after shutdown if there is a small failure in the coolant seals.
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