Terrible Rough Idle, Good MPG = *BLOWN SC gasket*..pics pg 2 - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 03-08-2007, 07:58 AM   #31
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

TaterTot called. It appears that his LIM'* were replaced soon and we speculated that the old SC gasket was reused. It wasn't intact and caused a leak.
BillBoost37 is offline   Reply With Quote
Old 03-08-2007, 08:05 AM   #32
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default




this is why you fix your issues before modding..the gasket is royally fubared.


so replace the injector o-rings, sc gasket..o rings, tb gasket...hmm..LIM gaskets might not hurt...and of course the valve cover gaskets.
Hans is offline   Reply With Quote
Old 03-08-2007, 08:51 AM   #33
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'd be on the aluminum lowers in a heartbeat. Wouldn't even be a though..it would be automatic. If they fubared the SC gasket..how can you believe anything else?

If you ever think about valve covers..this is the time. It isn't fun doing them any other time.
BillBoost37 is offline   Reply With Quote
Old 03-08-2007, 08:55 AM   #34
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

Yeah, I'd say that SC gasket could use replacing, lol.

While you're down there, you might as well replace that LIM gasket again, this time with the aluminum-framed one, get rid of the Dex and call that part done.

It sounds like you are doing the right thing and getting it all tuned up and running properly before doing any modding. That'* the only way to go, IMO.

Since you have it off already, how'* the SC look inside?

You going to change the coupler while you're at it? Your post gave me the impression that it'* bad too.
lash is offline   Reply With Quote
Old 03-08-2007, 09:02 AM   #35
Junior Member
Posts like a Ricer Type-R
 
Join Date: Mar 2007
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
gotbeer is on a distinguished road
Default

You are most likely vacuum leaking out of the supercharger. Time to do a nose rebuild.
gotbeer is offline   Reply With Quote
Old 03-08-2007, 09:04 AM   #36
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Quote:
Originally Posted by gotbeer
You are most likely vacuum leaking out of the supercharger. Time to do a nose rebuild.
If a supercharger builds positive pressure how do you figure there'* a nosedrive vacuum leak. Oil will leak out the nose first, when that is gone...they you'd get air and bearing chunks.
BillBoost37 is offline   Reply With Quote
Old 03-08-2007, 10:42 PM   #37
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

....and don't forget to replace the LIM plastic coolant elbows. Cheap insurance while you're at it.

....and since the valve covers are off...cough..rockers...cough
2000SilverBullet is offline   Reply With Quote
Old 03-08-2007, 10:55 PM   #38
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Paul, let'* not mod a car that isn't running right in many ways. There are issues here, and probably more after that. This car has 170k on it, and needs alot of work.
willwren is offline   Reply With Quote
Old 03-08-2007, 11:03 PM   #39
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

Quote:
Originally Posted by willwren
This car has 170k on it, and needs alot of work.
Cosmetically the car is in perfect shape. I've received 2 PMs asking me if I wanted to sell this one for a bit more than i paid...no I'm keeping it...

It does not need much, I just need to figure out how to adjust the shiftknob assembly.

tonights agenda
Clean up everything
Replace Valve Cover Gaskets
Replace Rubber o-rings on the injectors, the bottom ones.
Clean up everything even more
Replace coolant elbow

INTENSE stuff will be here tomorrow along with all associated gaskets, i ordered gaskets from SHUCKS and the dealer to insure I get them tomorrow in case something goes wrong. The car will be running PERFECTLY by this weekend I hope. Lets only hope for 0* of KR with the 3.4

I'm hoping to have the coupler fixed by tomorrow night and have everything ready for the gaskets I'm getting on saturday.

The 93 is really needing a fuel pump bad right now, it got much worse after a recent 800 mile trip.

I'm ordering a fuel pump once I get my credit card back online...they cancled it for some reason because it was "stolen" or something but I never noticed any charges.

lots of the SC gasket was GONE. scary, I'm glad I caught it early.

the SC looks good for the miles, I'm not going to clean it other than the bypass section and wipe down the inlet.
Hans is offline   Reply With Quote
Old 03-08-2007, 11:41 PM   #40
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Couldn't resist the temptation to recommend further mods.

Yes, I agree that he should take Bill'* advice to get her running well first and concentrate mods on the 93.

You won't find me making those recommendations though. I mod all my cars.....and keep them all reliable daily (when the sun is shining and the roads are dry ) drivers.

OK, I lie a little. The Jeep only has K&N cone CAI intake and Borla exhaust. I have never even changed a valve cover gasket. 170 K and running strong in all weather.
......and it is the only one that still has an EGR.

Hans - don't expect to run faster than mid-high 14'* with a 3.4"
2000SilverBullet is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
How can I diagnose a blown head gasket? Maybe LIM gasket? rstrunk 1992-1999 6 03-15-2009 10:24 PM
Good system, sounds terrible... 3 12" subs w/ MA HK2000 mcnutz Audio (and aftermarket electronics) 11 09-14-2006 02:02 AM
The MPG Post to end all MPG Posts mkaake 1992-1999 24 05-05-2005 03:25 AM
From rough idle to high idle randman1 1992-1999 25 09-07-2004 09:20 PM
'00SSEi:rough idle,high idle...Please Help.... GTP2SSEi General GM Chat 2 07-29-2003 01:46 PM


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 02:54 PM.


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.