Overheating but not really? Air in system or other problem? Need help diagnosing (Page 3/14)
cebix NOV 03, 05:10 PM
That intake gasket got me thinking... I do have occasional white smoke at idle and a lot when cold starting. I figured it's the weather but not so sure now... The intake manifold torquing being messed up is of some probability. Gonna have to take off the manifold then to check what's going on there. Guess I'll have to flush the cooling system to do that? Or can I just loosen the nuts and retorque them to spec? Are intake gaskets reusable or throwaways once torqued?
Patrick NOV 03, 06:15 PM

quote
Originally posted by theogre:

4 cyl Intake gaskets are Dry install. standard ones are rubber/plastic over metal and sealer or wrong bolt torque will leak coolant out or far worse leak into #4 runner.



I don't know how long it would take to become obvious... but if that's occurring, wouldn't #4 spark plug look "cleaner" than the other three?
cebix NOV 04, 04:28 AM
Gonna look at those spark plugs but I suppose they're all gonna be pretty clean cause of the mileage. I've only done about 500 miles since the rebuild and changed the oil two times. Going to order new rad and thermostat caps just to be on the safe side and probably go to a specialized shop that deals with cooling systems if I can find any...

EDIT: Should I buy the AC Delco safety release rad cap or the standard AC Delco?

EDIT2: Ok, I see the safety caps are not recommended so there you go. I currently have the safety cap. So that might be the problem. Rockauto says it fits but now I believe it's the wrong type and might be venting...

[This message has been edited by cebix (edited 11-04-2019).]

olejoedad NOV 04, 07:42 AM
Wasnt there a problem with some duke intake manifolds.cracking internally and letting coolant into the intake air?
theogre NOV 04, 02:17 PM

quote
Originally posted by Patrick:
I don't know how long it would take to become obvious... but if that's occurring, wouldn't #4 spark plug look "cleaner" than the other three?

Most times yes. Problem is new/rebuilt engine plugs may not be driven enough to see this.
I usually tell people to remove all plugs and keep them in order and look for any plugs cleaner then rest for this or bad head gasket etc.
theogre NOV 04, 03:13 PM

quote
Originally posted by olejoedad:
Wasnt there a problem with some duke intake manifolds.cracking internally and letting coolant into the intake air?

Maybe but most are intake gasket leaking into #4 runner.
Felpro makes/made a gasket design to fight this exact problem. Most others are same rubber coated metal as OEM.

If is leaking then likely retorquing w/o removing all bolts won't help.
Once torque most gaskets are "destroyed" taking apart again including this.
If you torque to spec then the spec is for clean dry hardware and holes. IOW the spec means nothing to most.
cebix NOV 05, 01:49 AM
Changed the rad cap. Still acts the same but now it doesn't overflow the reservoir so that's one thing down. These nonvented but safety caps should really be taken down from rockauto.

Maybe now it's just a matter of burping?
Patrick NOV 05, 02:21 AM

quote
Originally posted by cebix:

Maybe now it's just a matter of burping?



The Ogre will come along again and say "burping" isn't necessary ... but Here is the procedure I follow.
fierobear NOV 05, 12:45 PM

quote
Originally posted by cebix:

Changed the rad cap. Still acts the same but now it doesn't overflow the reservoir so that's one thing down. These nonvented but safety caps should really be taken down from rockauto.

Maybe now it's just a matter of burping?



Sounds like there were multiple problems, and the rad cap was one. I’m glad you are making progress. Best of luck.
cebix NOV 05, 01:55 PM
No real way for me to get the rear higher right now so I'm trying burping without that. No real success though, still hear hissing from the heater core when decelereating and with light load. Think I'm gonna install a bleeder valve there and see where that gets me. If nowhere then the radiator is next. Checked the bottom and no crushed pipes.