maddmann313 Posted January 1, 2012 Share Posted January 1, 2012 I recently did an intake swap and radiator swap on my 72 it has a sbc 350/350 trans and while I'm driving a good bit of white somke is comming out of the exhaust!! Even after i turn the car off a good bit is still comming out! What causes this?? Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted January 1, 2012 Share Posted January 1, 2012 sounds like it's burning coolant Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted January 1, 2012 Share Posted January 1, 2012 you probaly have an intake gasket allowing coolant to go into the intake port.... Quote Link to comment Share on other sites More sharing options...
maddmann313 Posted January 1, 2012 Author Share Posted January 1, 2012 Well is it hurting anything? Other than smoking like crazy? Quote Link to comment Share on other sites More sharing options...
70mcarlo Posted January 1, 2012 Share Posted January 1, 2012 Well is it hurting anything? Other than smoking like crazy? Â Besides sucking coolant from the cooling system, it could be contaminating/diluting your oil (not good). Quote Link to comment Share on other sites More sharing options...
BowtieThunder Posted January 1, 2012 Share Posted January 1, 2012 Originally Posted By: maddmann313 Well is it hurting anything? Other than smoking like crazy? Â Besides sucking coolant from the cooling system, it could be contaminating/diluting your oil (not good). Â Yea I would be concerned that if coolant is getting into an intake port, it could also be leaking into the crankcase which will destroy the motor.. first thing I would do is check the oil and make sure its not over full and milky.Second I would be getting a new set of intake gaskets and pulling intake to fix it Quote Link to comment Share on other sites More sharing options...
maddmann313 Posted January 4, 2012 Author Share Posted January 4, 2012 well I took the old intake off and replaced it with a edelbrock 2701 intake, and changed the oil... now it isnt smoking out of exaust, but is blowing the heater hose off of the intake and spraying coolant every where!!!! whats causing this??? Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted January 4, 2012 Share Posted January 4, 2012 Are you sure you have the heater hose hooked up to the correct place on the intake? Quote Link to comment Share on other sites More sharing options...
maddmann313 Posted January 4, 2012 Author Share Posted January 4, 2012 I hooked it up like on the intake I had on it b4 Quote Link to comment Share on other sites More sharing options...
maddmann313 Posted January 4, 2012 Author Share Posted January 4, 2012 Could it be a bad/ clogged heater core??? Also the heater has not been working too well! Could this be it?? Quote Link to comment Share on other sites More sharing options...
Mike 57 Posted January 4, 2012 Share Posted January 4, 2012 When does it happen? when just started or when warmed up? Did you use a chrome fitting that happens with them. Is the thermostat in correctly? Quote Link to comment Share on other sites More sharing options...
maddmann313 Posted January 4, 2012 Author Share Posted January 4, 2012 It happens after it warms up. And yes the thermostat was installed correctly, and yes it was a chrome fitting Quote Link to comment Share on other sites More sharing options...
VE3HZZ Posted January 4, 2012 Share Posted January 4, 2012 It happens after it warms up. And yes the thermostat was installed correctly, and yes it was a chrome fitting  Which Thermostat? is it a fail safe or normal? Even a new one can be BAD and stick CLOSED. That would build up pressure in the system. May want to check it in a tank of boiling water with a temp probe to make sure it's working correctly. I have seen a few NEW ones fail and cause similar situation. Maybe try running it without one to see if it does this again (also what is the RAD cap your using?) If new check to see what it's rated at I think on these it's 8-10 PSI but I maybe off? Have to check the book to be sure on these without an expansion tank maybe it's higher??? But those would be the first things I'd look into for pressure build up. Heater core blocked ? easy check is hook the 2 together bypassing it if you can't tell if coolant is flowing. Not hard to do and proves if that is the problem without removing anything or tearing dash apart for a non issue.  Good luck keep us posted.  Regards  Scott Quote Link to comment Share on other sites More sharing options...
maddmann313 Posted January 4, 2012 Author Share Posted January 4, 2012 Here's the hose  Radiator fluid all over the motor  Puddle by the driver side Quote Link to comment Share on other sites More sharing options...
jacob Posted February 26, 2012 Share Posted February 26, 2012 You can try testing the thermostat by putting it in boiling water It should open if not its bad I hope you can fix it. Quote Link to comment Share on other sites More sharing options...
LS5 Posted February 26, 2012 Share Posted February 26, 2012 Ok, this may sound stupid but it can and has happened to even a tech I know, He put in a new rad and thermostate and the same thing happened with his 396 he started to smoke white which was the intake blew a gasket and then the same heater hose right at the intake there behind the Alt bracket.. Low and behold this Tech had stuck the new thermostate in UPSIDE Down, stopping the thermo from openeing and blowing out the hose due to back pressure and most likely the intake as well, not to say it didnt help that one rad hose was cold and the other was hot that would have been to simple to catch but it did happen. Not saying that is what is wrong here but mistakes can happen or as mentioned even new thermostates can stick shut as well... Darren. Quote Link to comment Share on other sites More sharing options...
badddoin Posted February 26, 2012 Share Posted February 26, 2012 At that point you're still behind the thermostat, so it seems to me either a faulty stat (new doesn't always mean good) or a bad rad. cap, not letting it vent-off excess presssure. Your top rad. hose should get hot when yor engine reaches operating temp. I'd try running it without the cap on till it opens up. If it blows off then its a stat problem. If it blows after you put the cap back on its the cap. If it blows coolant out the radiator with the cap off, you changed the wrong gasket. Quote Link to comment Share on other sites More sharing options...
jacob Posted February 29, 2012 Share Posted February 29, 2012 There should be 15 pounds of presure I think i heard it on two guys garage. Quote Link to comment Share on other sites More sharing options...
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