Just noticed white residue on coolant overflow bottle... Questions

[ktyamaha36]

bought my truck bone stock, and did the mods listed in my Sig so far.

Ive had it tuned running aggressive street for a few months now. Just popped the hood to give everything a once over and noticed some white residue on the overflow bottle, and also on the air filter box. Doesnt look like ive lost any coolant. I know this is a sign of a blown HG. I havn't noticed any loss in performance, or smoke from the exhaust. Truck runs great.

If this is a sign of a HG letting go, should I take the tune out of it? Should I take it really easy or drive it normal like I have been? Its not boiling over under hard WOT or anything. And its never poured out all over the ground.

Is it normal when the cap releases pressure to get some residue around the cap and on the top of the bottle? (I am running gold coolant) It has been flused and refilled when the new oil cooler was installed for preventative measures when I first bought the truck. ECT/EOT are perfect. I plan do to get rid of the ford gold this summer when doing another flush.


I wont be able to do studs until this summer when the cash flow is up. Just looking for suggestions as to what to do/look for/ not do etc...

Thanks for the tips guys!

[jetjock15]

You would have to be loosing water for it to be an issue. Any amount of spilled coolant on the degas will evaporate and leave white residue. A little can get on the threads of the cap under pressure, than when you open it the white stuff falls onto the degas, this is like a handful of specs I'm talking about. If your loosing a lot than it would be apparent. Keep a close eye on water level. If it goes down at all you got probs. step one- replace the cap. Might do a bit more testing and evaluating before you just go pull the cab off. Reading these forums can cause a guy to lean so far forward he falls on his face...

[jetjock15]

Oh yeah, if your going to be running an aggressive street tune at WOT much, your sure to blow your HGs, so doing your gaskets now or later probably moot point, make sure to install Studs... Should you "drive normal" lol- goodluck.

[southend]

If you can't afford studs, dont chance running a tune. Yea, I know, there are a million people out there that are going to say there are safe non studded tunes......they get that same info from the guys/gals writing them. Make sure your coolant level is at our below the min level, that is the revised max level. Get a new cap and watch it. If you don't have a monitor, you beter get one, a clogged oil cooler can damage an egr cooler, that can cause overpressurization.
Read the sticky on monitoring.

Edit: I se you got the monitor.

Sent from my phone that somebody didn't help me get.

[Lilpooh]

Start testing.

Troubleshooting coolant loss (white residue around cooling system components(degas))


Sent from my iPhone using AutoGuide.com App

[ktyamaha36]

Thanks for the help guys.. Sounds like I will get myself a new cap for starters. I know gaskets were soon to come after running a tune but not sure if Im there yet..lol