2005 GXP - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-12-2014, 09:13 PM   #11
Senior Member
Posts like a Turbo
Thread Starter
 
vendo's Avatar
 
Join Date: Sep 2010
Location: MASS
Posts: 480
Thanks: 0
Thanked 1 Time in 1 Post
vendo is on a distinguished road
Default

well its not leaking that bad...that'* a lot of work..
vendo is offline   Reply With Quote
Old 06-13-2014, 06:20 AM   #12
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

It is a bit of work, but it does not cost a lot to do if you can do it yourself.
If you plan on keeping the car for a while I'd consider getting it done, if you do not plan on keeping the car for long then ignore it.
It is not what you are seeing on the outside that is the most important, there are coolant ports in the intake, and if the LIM Gasket is starting to fail letting oil leak out, then I am willing to be the gaskets are failing around the coolant ports, when that happens you have a great chance that coolant is going to get sucked into the cylinders, and since fluid will not compress you will hydrolock the motor, possibly ruin some rings, and in some cases you can throw a connecting rod through the block.
If you think an LIM Gasket job is a lot of work, try replacing the rings on your pistons, or rebuilding the motor if a conn rod gets thrown through the block.
It is your motor though, I do highly suggest having the nylon framed LIM gasket changed, only trying to help you keep from ruining your motor, in the long run it is your motor though, and your choice.
WilliamE is offline   Reply With Quote
Old 06-13-2014, 08:25 AM   #13
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

besides hydrolock, when they leak oil thats when you have the chance for engine fires, it pools up on top and thats the hottest part of the engine. all it is is taking stuff off and putting it back on, you just have to take a bunch of parts off to get at it unfortunately. took me like 10hrs the first time. its not hard, just time intesive
jwfirebird is offline   Reply With Quote
The Following User Says Thank You to jwfirebird For This Useful Post:
WilliamE (06-13-2014)
Old 06-13-2014, 04:42 PM   #14
Senior Member
Posts like a Turbo
Thread Starter
 
vendo's Avatar
 
Join Date: Sep 2010
Location: MASS
Posts: 480
Thanks: 0
Thanked 1 Time in 1 Post
vendo is on a distinguished road
Default

How do you tell, water on oil,cant smell anti freeze anywhere
vendo is offline   Reply With Quote
Old 06-13-2014, 06:25 PM   #15
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

If the coolant starts to leak internally the only way to tell if watch your coolant levels in the overflow, if you start having to add more coolant to that than normal then that can be one indicator, once you start to notice enough coolant disappearing it may be too late though.
I have heard of people with as low as 60k miles have the LIM Gaskets fail, mine made it to around 130k, but going by how disintegrated mine were, and the shape of the gasket near the coolant ports, mine were close to failing enough to cause hydrolock.
If you want to see pics of how my gasket looked I can post them.
I can post a link to one of the pics from when I did my UIM/LIM, it is from another site, it if full of good info on the job, although I have a naturally aspirated motor, there were lots of good pics in the thread, but imageshack screwed me when they stopped being free, now most of my pis will not show up.
I wish I still had the pics of the coolant that had already pooled up in the corners of the LIM, near the "hidden" bolts.
Ehh, I'll have to attach the pic, as imageshack says it is no longer there, yet I can still see it on page 2.

Replacing UIM, UIM Gasket, and LIM Gasket. - Page 2 - 3800Pro.com Forum
Attached Thumbnails
2005 GXP-pic12z.jpg  
WilliamE is offline   Reply With Quote
Old 06-13-2014, 10:40 PM   #16
Senior Member

Certified GM nut
 
Tech II's Avatar
 
Join Date: Feb 2014
Location: Worcester, Ma.
Posts: 2,149
Thanked 783 Times in 612 Posts
Tech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond repute
Default

Actually taking that SCer off is not that bad......don't know why, but I can't recall having problems with the lower intake gaskets on the SC'd engine, and never saw/heard of one ever hydrolocking...not saying it can't happen, but just not a common thing on a SC'd engine....

The naturally aspirated 3.8 was a totally different ball game...
Tech II is offline   Reply With Quote
Old 06-14-2014, 08:11 AM   #17
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

maybe be something to do with the compression. they have the same lower intake and gaskets, dont they? the only thing mine was dong either time was losing maybe an inch a week or two with the wife driving it 450 miles a week. the first time it also had a cyl 6 misfire code
jwfirebird is offline   Reply With Quote
Old 06-14-2014, 09:27 AM   #18
Senior Member
Posts like a Turbo
Thread Starter
 
vendo's Avatar
 
Join Date: Sep 2010
Location: MASS
Posts: 480
Thanks: 0
Thanked 1 Time in 1 Post
vendo is on a distinguished road
Default

i looked in rad today,no water loss i see..i will monitor it now...
vendo is offline   Reply With Quote
Old 06-14-2014, 03:51 PM   #19
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

The SC and NA both share the same LIM Gaskets, so I cannot see why the lowers would not fail on it as well, I am pretty sure the main contributing factors to them failing is heat, and supposedly DexCool, I read something a while back that said the EHA-2 was a plasticizer for polymers, and a plasticizer is meant to soften plastics when used in manufacturing processes of polymers, of course I don't see how it would soften plastic when not used in the manufacturing process, just mentioning it in case one of you know a bit more about me involving chemistry..

Al, just keep an eye on the overflow tank, rather than the radiator, levels fluctuate when you drive the car, and then stop driving, so mainly watch the overflow tank levels after the car has cooled, and has not been driven for a little while, if you start to notice a lot of it seems to be disappearing with no signs of any external leaks, then I'd consider replacing the LIM Gasket.
WilliamE is offline   Reply With Quote
Old 06-15-2014, 10:17 AM   #20
Senior Member
Posts like a Turbo
Thread Starter
 
vendo's Avatar
 
Join Date: Sep 2010
Location: MASS
Posts: 480
Thanks: 0
Thanked 1 Time in 1 Post
vendo is on a distinguished road
Default

will pressure test tell?
vendo is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Your May COTM Winner: GXP Venom's 2005 GXP! Mortehl Your Ride: GM Pictures & Videos 41 05-17-2006 03:11 PM
2005 Bonneville GXP -vs- 2006 Grand Prix GXP carlmorrell General GM Chat 21 02-19-2006 08:29 PM
2005 Mercedes SLR vs. 2005 Merecedes AMG E55 SSsuperchargedEi Your Other Rides: Pics & Videos 12 10-21-2004 12:51 AM
Madden 2005 and Ncaa 2005 Kennginn Lounge 6 08-15-2004 03:43 PM
2004/2005 GXP shot BlackBonEvil89 General GM Chat 15 08-07-2003 11:10 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 03:53 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.