Rushing water sound on cold started ups

Sonyps307 · 02-27-2011, 10:53 PM

Hey guys I have a new rebuild 7mge with about 2000 miles on it. So when I start my car on a cold start up I hear a rushing water sound. then a few mins later it stops. Also I found a leak on the bottom of my water pump could that cause this. Thanks

btwilson86 · 02-27-2011, 11:04 PM

Is the rushing water sound kinda like a waterfall? If so, that's a sign of air in the cooling system. Usually a good long "burping" session can clear this up. Be sure when burping to get the nose of the car as high as possible.

And fix the leak, regardless of if it causes the problem you're noticing.

Sonyps307 · 02-27-2011, 11:13 PM

How do I Go about burping the system.

cre · 02-28-2011, 01:03 AM

It's discussed in the FAQ. I've never needed to do it but some people swear it's a must. It's not a Toyota standard procedure for the MKIII but it is for other vehicles (including the MR2, but that has a far more complex cooling system).

Removing the jiggle valve from the thermostat will help bleed the excess air more quickly with no ill side effect. Filling the coolant reservoir will help ensure no new air is introduced as the system is cooled (at least not from there).

You MUST fix the leak however you go about purging the extra air.

Sonyps307 · 02-28-2011, 01:28 AM

I was just worried because I heard that a BHG can cause this. But I dont know how it could be a BHG because it's a new gasket and I had them torque the head bolts to 75lb. The head was shaved also

cre · 02-28-2011, 03:03 AM

Any leak in the coolant system can cause this, not just a BHG.

02-27-2011, 10:53 PM	#1
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	Rushing water sound on cold started ups Hey guys I have a new rebuild 7mge with about 2000 miles on it. So when I start my car on a cold start up I hear a rushing water sound. then a few mins later it stops. Also I found a leak on the bottom of my water pump could that cause this. Thanks

02-27-2011, 11:04 PM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Is the rushing water sound kinda like a waterfall? If so, that's a sign of air in the cooling system. Usually a good long "burping" session can clear this up. Be sure when burping to get the nose of the car as high as possible. And fix the leak, regardless of if it causes the problem you're noticing. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

02-28-2011, 01:03 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	It's discussed in the FAQ. I've never needed to do it but some people swear it's a must. It's not a Toyota standard procedure for the MKIII but it is for other vehicles (including the MR2, but that has a far more complex cooling system). Removing the jiggle valve from the thermostat will help bleed the excess air more quickly with no ill side effect. Filling the coolant reservoir will help ensure no new air is introduced as the system is cooled (at least not from there). You MUST fix the leak however you go about purging the extra air. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-28-2011, 03:03 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Any leak in the coolant system can cause this, not just a BHG. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
car suddenly wont start - never ran great anyway, esp. cold, now cranks, but won't st	rjSupra	MKIII Supra	41	03-21-2014 05:27 PM
Won't suck the water from overflow	illusive38	MKIII Supra	7	05-24-2012 09:19 AM
Occasional Clicking Sound (Blinker sound) coming from instrument cluster	Mike87	MKIII Supra	8	08-26-2010 02:29 AM
Where the h--- is the water going???	illusive38	Non-Generation Specific Questions	1	05-27-2008 03:23 AM
Waterfall sound on cold start! HELP!	88 MARK3	Non-Generation Specific Questions	7	06-29-2006 03:45 PM

02-27-2011, 11:13 PM	#3
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	How do I Go about burping the system.

02-28-2011, 01:28 AM	#5
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	I was just worried because I heard that a BHG can cause this. But I dont know how it could be a BHG because it's a new gasket and I had them torque the head bolts to 75lb. The head was shaved also