GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Headgasket upgrade, fun stuff....not!

Thread Tools
 
Search this Thread
 
Old 04-24-07, 08:53 PM
  #1  
JeffTsai
Lexus Fanatic
Thread Starter
iTrader: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,392
Likes: 0
Received 43 Likes on 17 Posts
Wink Headgasket upgrade, fun stuff....not!

The guys that have done this weren't lying lol. It really kills your back after a while. This is the first time I've opened up the motor so I'm going at it really really slowly. Just some progress pix as of tonight. I didn't post up a DIY on this because it's simply too big of an undertaking even for most of the DIY'ers out there. One small mis-step can lead to catastrophic failure.

The intake manifold on this car is really really hard to work with. I spent most of my time wrestling with the very bottom piece of the manifold. It finally came off and I called it a night.

Oh yea, I was glad to find that my entire valvetrain and valve cover was spotless. Not even a trace of yellow film or anything. Everything was completely clean and clear. I guess the Mobil1 synthetic was doing its job and is good for something

Anyways, on with the pix!



Old 04-25-07, 12:02 AM
  #2  
cliffud
Former Vendor
iTrader: (3)
 
cliffud's Avatar
 
Join Date: May 2003
Location: away from keyboard
Posts: 5,700
Likes: 0
Received 3 Likes on 3 Posts
Default

what's blurred out?
Old 04-25-07, 01:36 AM
  #3  
qlex56
Lead Lap
 
qlex56's Avatar
 
Join Date: Feb 2006
Location: CA
Posts: 463
Likes: 0
Received 0 Likes on 0 Posts
Default

what size head gasket are you installing 2mm?
Old 04-25-07, 01:54 AM
  #4  
ElitistK
Lexus Champion
iTrader: (4)
 
ElitistK's Avatar
 
Join Date: Sep 2005
Location: CA
Posts: 2,638
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by cliffud
what's blurred out?
his skillful hand.
Old 04-25-07, 04:47 AM
  #5  
JeffTsai
Lexus Fanatic
Thread Starter
iTrader: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,392
Likes: 0
Received 43 Likes on 17 Posts
Default

Originally Posted by ElitistK
his skillful hand.
Nah thats the light thats in the way

And yes, its a 2MM headgasket.
Old 04-25-07, 05:19 AM
  #6  
lexusondubs
dubsonlexus
iTrader: (9)
 
lexusondubs's Avatar
 
Join Date: Aug 2002
Location: Clearwater,FL
Posts: 7,693
Likes: 0
Received 4 Likes on 4 Posts
Default

y new headgasket soo you can run more boost ??
Old 04-25-07, 09:01 AM
  #7  
tmf2004
5% Club. Killing it!!!
iTrader: (15)
 
tmf2004's Avatar
 
Join Date: Nov 2004
Location: FL
Posts: 21,942
Received 63 Likes on 61 Posts
Default

THis is going to be another Boosted Beast... Keep us posted Jeff..
Old 04-25-07, 10:59 AM
  #8  
bighitbike
Lexus Champion
 
bighitbike's Avatar
 
Join Date: Sep 2005
Location: washington
Posts: 2,999
Likes: 0
Received 1 Like on 1 Post
Default

O man that looks intense!! I would not be happy doing that
Old 04-25-07, 11:03 AM
  #9  
Alexus_300
Lexus Test Driver
iTrader: (4)
 
Alexus_300's Avatar
 
Join Date: Sep 2004
Location: North Carolina
Posts: 1,597
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by lexusondubs
y new headgasket soo you can run more boost ??
Yes, the new head gasket is to lower the compression ratio to around 8.7-9.0:1 so that he can run slightly higher boost without detonation..
Old 04-25-07, 04:30 PM
  #10  
benzo555
Lexus Test Driver
iTrader: (11)
 
benzo555's Avatar
 
Join Date: Nov 2004
Location: Texas
Posts: 1,560
Likes: 0
Received 1 Like on 1 Post
Default

Yikes.. sounds pretty bad.. I would have waited until it blew or leaked..
Old 04-25-07, 08:25 PM
  #11  
corkycal
Lexus Champion
iTrader: (8)
 
corkycal's Avatar
 
Join Date: Jul 2004
Location: So Cal
Posts: 2,014
Received 1 Like on 1 Post
Default

jeff,

very impressed with your mechanical skills. most of us will not touch this area but i have to hand it to you.
Old 04-29-07, 11:48 PM
  #12  
JeffTsai
Lexus Fanatic
Thread Starter
iTrader: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,392
Likes: 0
Received 43 Likes on 17 Posts
Default

Originally Posted by bighitbike
O man that looks intense!! I would not be happy doing that
Honestly, I don't think I would want to do this all over again lol. Still though, I wouldn't want to shell out the $700-1000 for a shop to do this. I guess that's why I'm a DIY guy after all lol. I'm not looking forward to my bottom end rebuild lol

Originally Posted by Alexus_300
Yes, the new head gasket is to lower the compression ratio to around 8.7-9.0:1 so that he can run slightly higher boost without detonation..
Right on. I'm putting in a 2MM headgasket so I can drop the compression ratio to 9:1 to run higher boost.

Here are the updates as of today
My car has been sitting in the garage for a whole week because I was too busy to work on it. Oh yeah, and also I was waiting for a tool to come in the mail. I don't know why but a 14mm allen wrench is impossible to find. I tried about 10 local stores before I finally gave up and just ordered one online.


Hmmm...not enough torque.


Ahhhhhhh....MUCH better!


Pulling off all the stuff so I can clean up the head.


Stock paper thin HG VS. upgraded 2mm thicker HG.


Head cleaned up and ready to be installed.
Old 04-29-07, 11:51 PM
  #13  
JeffTsai
Lexus Fanatic
Thread Starter
iTrader: (1)
 
JeffTsai's Avatar
 
Join Date: Aug 2005
Location: DFW area TX
Posts: 5,392
Likes: 0
Received 43 Likes on 17 Posts
Default


All the little parts and such removed from the head.


All cleaned up and ready to be put back together.


All cleaned up and pretty


Another shot!


Torquing down the ARP head studs.


Doing the final rounds and tightening up all the main bolts.


Finished up to this point and called it a day. I'll reinstall the turbo and manifold tomorrow. Hopefully I'll have it all up and running by then
Old 04-29-07, 11:59 PM
  #14  
macd7919
Lexus Champion
iTrader: (10)
 
macd7919's Avatar
 
Join Date: Jun 2004
Location: MD/WA
Posts: 2,539
Likes: 0
Received 5 Likes on 5 Posts
Default

Looks good, probably don't have to ask this but you did keep the buckets in order right?
Old 04-30-07, 12:25 AM
  #15  
Seize
Loves Snickerdoodles!
 
Seize's Avatar
 
Join Date: Jun 2002
Location: San Diego, California
Posts: 19,736
Received 68 Likes on 53 Posts
Default

Cool DIY! Seems like a whole lotta work involved. Thanks for sharing the pics


Quick Reply: Headgasket upgrade, fun stuff....not!



All times are GMT -7. The time now is 06:51 AM.