Question about 1985 Mazda RX-7

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I need a parts list for repairing the RX-7 white smoke problem. 5k rebuilt engine, white smoke comes out exhaust after engine warms up, has a new cat. converter.

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White smoke means that coolant liquid is getting combusted inside the cylinders. That usually happens when the head gasket has lost its sealing properties, and coolant is leaking inside engine.
The part is not expensive , enter the year and subnmodel info on the following website to find the part:
Mazda RX-7 Head Gasket - Head Gasket - Partstrain.com
To ensure that the problem is head gasket, you can do a compression test on the car. When problem is the head gasket, the coolant liquid will be slowly consumed while engine is running.
here a compression tester: Actron CP7828 Professional Compression Tester see Doing a Compression Test
To replace the head gasket follow procedure on haynes manual : 1979-1985 Mazda RX-7 Repair Manual by Haynes Publishing

Posted on Oct 07, 2009

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Posted on Jan 02, 2017

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2 Answers

My car has white smoke coming from the exhaust


he causes of white exhaust smoke can vary; however, it is common to see white exhaust smoke when first starting a car, especially on cooler days. This is generally steam caused by condensation. As the engine warms up and the condensation dissipates the white exhaust smoke (steam) is no longer seen. If excessive white exhaust smoke is present well after the engine warms up, it is necessary to have the car inspected for possible internal coolant leaks. Indicators of an internal coolant leak include billowing white exhaust smoke accompanied by a sweet odor or a low coolant reservoir level. An internal coolant leak can also contaminate the engine oil giving it a frothy, milky appearance. Even small amounts of coolant entering the combustion chamber will produce white exhaust smoke.
One of the main causes of white exhaust smoke and coolant loss is a cracked or warped cylinder head, a cracked engine block, or head gasket failure caused by overheating. A cracked head may allow coolant to leak into one or more cylinders or into the combustion chamber of the engine. Dirty coolant, a poorly maintained cooling system, a low coolant level, or a non-functioning cooling fan can cause engine overheating. In addition, engine wear can eventually cause the gaskets to lose their capacity to seal properly allowing internal coolant loss. Intake manifold gasket and head gasket failures are two of the most common sources of internal coolant loss caused by engine wear.
Never remove the radiator cap or coolant reservoir cap while the engine is hot or running as it can cause serious injury; always allow the car to cool down completely first. Checking for a low coolant level in the reservoir is the first step in determining if coolant loss is causing the white exhaust smoke. If the coolant reservoir is at the proper level but excessive white exhaust smoke is present, a cooling system pressure check is required to determine where, if any, coolant leaks are located.

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My 2006 e65 leaves white smoke somtimes


White smoke on start up can be lots of raw fuel

White Smoke any other time is a failed Head Gasket
& major repair

Check to see if your coolant goes down in the plastic
container overnight

May 11, 2014 | 2006 BMW 750Li

1 Answer

Smokes when cold and stops once it warms up


How many miles on engine?. What color smoke? If white clouds of smoke that goes away when it warms up that indicates a possible housing seal. Another symptom would be having to add coolant. view this video -> https://www.youtube.com/watch?v=4H-B1nckyFE

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1 Answer

1985 Ford F150 302,5.0 Smoking running Rich and idling high and low


first of all u need to determine what color of smoke it is and is it coming out of the exhaust pipe. black smoke means excessive gas burning ...blue smoke means burning oil ...white smoke if seen in warm weather conditions means coolant leak into cylinder heads... but as running rich and high low idle might have a vacuum leak or carburetor need new base gasket or rebuilt ... good luck

Oct 13, 2013 | Cars & Trucks

1 Answer

White smoke


White smoke is usually water getting into the cylinders...
this can be a cracked or warped cylinder head, or more usually a blown head gasket.

Apr 19, 2017 | Volvo Cars & Trucks

2 Answers

My 1993 ford Festiva W model is smoky at start up mostly first start for the day and fine through out the day guessing cause the engine is warm, I have since done a service including- engine cleaning detox...


white smoke could be steam from condensation in the exhaust or maybe valves? check your ignition timing maybe the black smoke caused by the car running to rich.

Feb 11, 2013 | Cars & Trucks

2 Answers

White smoke out of exhaust on my 90 Bonneville......Checked oil looks fine.......What should I expect to pay to have head gasket replaced ??


I was going to say the same thing, sign of white smoke blowing out of your exhuast pipe is usually radiator fluid being leaked into the cylinder and being combusted. In this case it look like it's oyur head gasket and it needs replacment. A head gasket repair is a major work to be done, and it may take up to anywhere from 7-12hrs+ depending on how complicated things are. Most of the repair bill comes from labor and installation. In some case, the engine need to be removed from the car and to be rebuilded. You may be looking at a hefty price tag anywhere from the lowest 800 to 1700.oo+ cost wise. The more cylinder your engine is, the more the price will be. Sometime it is cheaper just to replace the engine, or entirely savage the car and get a new one if the repair bill is more then the car is worth.. You'll have to call around your local repair shop to get a quote vs replacing the engine and deciding if it is best to repair, replace, or savage.

Jan 31, 2011 | 1998 Pontiac Bonneville

1 Answer

My 93 has ton of engine smoke, why is that?


what color is the smoke??

Guide to smoke color
are few exceptions here but for most part

Blue smoke -burning oil- bad rings or bad valve guides

White smoke a little is normal after start up (condensation in exhaust pipes) large amounts - blown head gaskets

Black Smoke - running excessively rich

Nov 22, 2010 | 1993 Mazda RX-7

1 Answer

I start the car and it smokes alot when i throttle it white smoke comes out and then it starts to beep and says its over heated on the dash. i know i may have two problems but how do i fix them both and...


is it losing coolant? what does the smoke smell like? sweet? like burning anti freeze? if so it needs a new engine. I have found the dealer to have the best engines.

Nov 12, 2010 | 1987 Mazda RX-7

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