Go Back   Club Lexus Forums > Lexus Model Forums > GS Models > GS - Second Generation
Sign in using an external account
Register Forgot Password?

How to diagnose a 2jz headgasket

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 10-18-13, 07:13 PM   #1
toy4life86
Lead Lap
Trader Score: (4)
 
Join Date: Jun 2004
Location: California
Posts: 610
Default How to diagnose a 2jz headgasket

I think the Headgasket is blown on a gs300 I just bought. It has a new radiator the previous owner said it overheats
It didnt overheat on me but Water (water only) is running low and there is bubbling in the reservoir
I can hear a gurgling sound also in the engine bay.
so is it a blown headgasket?
and if so any DIY 2jz headgasket write ups? would help but can probably handle it even if not.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
Toyota supra
Corolla GTS AE86
Blue GS400 RIP
BLUE GS400 #2
LEGEND
toy4life86 is offline   Reply With Quote
Old 10-18-13, 07:20 PM   #2
toy4life86
Lead Lap
Trader Score: (4)
 
Join Date: Jun 2004
Location: California
Posts: 610
Default

I seen jefftsai kinda diy but maybe on another forum supra etc? is>?
__________________
Toyota supra
Corolla GTS AE86
Blue GS400 RIP
BLUE GS400 #2
LEGEND
toy4life86 is offline   Reply With Quote
Old 10-18-13, 07:55 PM   #3
MasterKwan
Driver
Trader Score: (0)
 
Join Date: Oct 2013
Location: VA
Posts: 194
Default

1 - Coolant goes down but, doesn't leak.
2 - Overflow bottle overflows and/or has bubbles in it.
3 - Temp sometimes spikes well over normal then returns to normal.
4 - Rough start and white smoke for the first start of the day. Then it smooths out and the whilte smoke stops.

You might get some or all of the symptoms or might simply be down on power. HG's blow in many different ways.

They have testers that let them look for hydrocarbons in the coolant while the engine is running. If you have that you're looking a blown HG, cracked head or cracked block.

Look around, it might be cheaper to find a replacement motor rather than doing the head gasket.
MasterKwan is offline   Reply With Quote
Old 10-18-13, 10:28 PM   #4
JeffTsai
Lexus Fanatic
Trader Score: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,369
Send a message via AIM to JeffTsai
Default

I saw that you PM'd me, I don't reply to my PM's. Please email me instead.

Anyways to reply to your question.
It sounds like the HG is pretty well blown by your symptoms. I usually go one step further and put a coolant pressure tester on the system to confirm. You pressurize the cooling system and you can pretty easily see where the leak is going.

It seems like the previous owner overheated it badly. After you overheat the engine, even if you replace the radiator, it will still have a damaged headgasket. Also, more than likely the head is warped when the engine gets hot enough to blow the HG. Take the head to a machine shop to get inspected, if it is heavily warped you will need replace the head.
__________________
2008 GS450h Hybrid Power! The new Daily Driver
2005 GS300 GTE VVTi Custom 76mm Billet Wheel Triple BB HKS T51R The 4 Door Race Car...in the making
2002 GS300 Sport Design Graphite Grey Pearl 807.9rwhp@29.1psi NA-T Daily Driver Boosted and passed OBD-II state inspection!


Please email me instead of PM. I don't always empty the PM, and I don't check it as often.
Email me here and it goes direct to my phone powerdynamix@gmail.com
JeffTsai is offline   Reply With Quote
Old 10-18-13, 10:28 PM
 
Reply
 
 
 

Tags
2jz, blown, gasket, head, symptoms

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 03:14 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Service | JOBS


Get all contact info

Content Relevant URLs by vBSEO 3.5.2