sheepdin

i heard some boiling sounds after i turn off the cars. It seems to be sound of boiling coolant..
is this nomal??? need to fix???

thx

Fd3BOOST

iTrader: (7)

Totally normal.
These cars will get hot.
You want to get rid of that sound, get a downpipe and plug all the holes around your radiator so that all available air is forced through the radiator.
You will be surprised how effective that can be in cooling the engine.

Dr Wankel

I occasionally hear coolant boiling in the overflow tank when the car gets really hot. Nothing to be really alarmed about.

sheepdin

Ooo~~~

scare me~

skunks

100% normal

BoostedRex

If it weren't normal, we'd all be shittin' when we got finished running the cars hard. You have nothing to worry about bro. Laterz.

Zach

bennettl

I have just purchased a 93 and it too was doing the same thing, I added some RED LINE Water Wetter and it seems to make the car run cooler but still boils if driven hard.

WONG FRIED RICE

I believe it's because u have air in your cooling system...there should be no gurgling/boiling sounds. I'm pretty sure that is what it is...because i had that same exact sound but when i changed to my Koyo radiator and bled the system i haven't heard the sound since.

TailHappy

Not to scare you unnecessarily, but when my water seals failed, I started getting LOUD boiling sounds. Plenty loud enough to hear with the hood down. People would actually come get me to make sure everything was ok with my car.......

Mahjik

iTrader: (1)

It's usually pretty normal depending on how hard you were running the car before shut down.

Basically, it's just localized boiling as the coolant is no longer circulating through the car (and you have no air coming into the engine bay). So, if the car is extremely hot, it can do a little boiling and bubbling sometimes (which is why it's nice to still keep the AST around).

However, if you are getting that sound and not running the car very hard you might pressure test your cooling system.

Also, make sure to drive without boost for a while before getting home and shutting the car down. Keeping the car moving and off boost is the best way to cool it down.

911GT2

I don't think it has anything to do with air in the cooling system. The stock radiator can't keep the car cool enough after long runs. Your Koyo can, so the boiling sounds disappear. Nothing to do with air, everything to do with cooling

Redrotor

Mine did with failed O-ring after rebuilt no any single sound.

YayeR

I've been told that the noise originated from the oil 'cooking' in the turbochargers.

Fritz Flynn

iTrader: (263)

This was just discussed on another thread and it was pretty informativem just do a search

9413Btt

I had the same sound when my coolant level is low. But after I bleed the radiator and refill the coolant, the sound seems to happend less.

sheepdin

o yes
i found my coolant level is about "L"
i think i have fill some in

so distilled water a must?>