R32 GTS-t white smoke problem

[Blackjack028]

Hi would like to know if anyone out there could give me some advise.
I own a 1989 r32 gtst RB20det. It runs like a dream but after slowing down
to a stop after going a decent speed or after a good decompression it blows out a lot of white smoke from the exhaust for about 5 seconds then stops. Don't think it smokes at all any other time. It's running a rb25det turbo. Any ideas would be appreciated.

Thanks

[Bubba1]

Hi would like to know if anyone out there could give me some advise.
I own a 1989 r32 gtst RB20det. It runs like a dream but after slowing down
to a stop after going a decent speed or after a good decompression it blows out a lot of white smoke from the exhaust for about 5 seconds then stops. Don't think it smokes at all any other time. It's running a rb25det turbo. Any ideas would be appreciated.

Thanks

You might want to double check your coolant level. If you have to add, white smoke can be an indicator that your motor has begun burning a little coolant. Perhaps your headgasket might have begun seeping a bit. Good luck.

[float_6969]

Yea, that sounds like a leaking HG to me too.

[Blackjack028]

Update:

I checked the radiator while it was running and no bubbles at all. Could it still be head gasket? I got told the valve seals could be worn.. Is this a possible assumption? Appreciate any more help thanks!

[Bubba1]

If it smokes only intermittently, then I'm guessing whatever is happening is in small amounts. that's why I suggest keeping a close watch on your coolant level whenever the engine is cool. If you find yourself adding coolant to keep it full and there are no drips of coolant on the ground where you parked overnight, that suggests something is letting coolant into the combustion chamber, And head gaskets are the most common suspect as they do not normally last forever, and you have an old car. It certainly might be something else, but without inspecting it, we can only guess.

Now, if the white smoke only occurs while the engine is cold, that might just be condensation (moisture) in the exhaust, which is not a problem. That should disappear after the car warms up and is common when doing doing short trips; the engine car does not warm up enough to eliminate the moisture. If that's what's happening (hopefully), then the fix is to drive the car more, which is a good thing in an R32

If the smoke you see is bluish instead of white, then it might possibly be worn valve seals, which consumes oil.

[WDRacing]

Can you get this to happen consistently? By that I mean, once it's warmed up to operating temp, can you do a wide open throttle pull, then come to a stop. Will it smoke after doing that?

[Blackjack028]

Yes it does smoke even after it has warmed up and usually only smokes after a open throttle pull and after say going down a steep hill. The smoke I have noticed does have a bluefish tinge to it is well. Thanks for the help!

[Dattebayo]

What oil do you use?

[float_6969]

That sounds like blowby getting sucked into the intake to me, but it could be turbo related too.

[Blackjack028]

I use penrite 10w - 50 fully synthetic.
Could it be a turbo problem? It's only a 25det turbo but it's spool is incredibly loud. I noticed lastnight that after I had been driving for only bout 10 min the turbo was glowing red and I had just been taking it easy and it was a cold night. This normal to heat up that quick?
Thanks for advice!!

[Dattebayo]

No, I'm pretty sure a glowing hot turbo isn't a good thing. I was suggesting that maybe a 15w should be a first step, but now I'm not sure you don't need a new turbo unit...

Can you verify that coolant is running through the turbo properly?

[themadscientist]

I'm saying valve seals. On decel you are pulling more vacuum and sucking oil past them int the intake ports. Under acceleration the intake ports are pressurized so it's leaking the other way.

[Blackjack028]

Thanks guys! I've heard it was valve seals by someone else and that does make a lot of sense! Is it a mission to change valve seals?
Also, there must be a problem with coolant reaching turbo. I just noticed the other day dried coolant sprayed over left side of engine bay kinda looks like it came from the area infront of intake plenum/fuel lines. Wtf! What is causing this? Could there be a blockage ?

[WDRacing]

It would be easier to swap out the head imho.