Ok diff between 3.8 and 3.9 and .... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-24-2013, 04:17 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2006
Posts: 471
Thanks: 0
Thanked 1 Time in 1 Post
goldfinger22 is on a distinguished road
Default Ok diff between 3.8 and 3.9 and ....

Ok I have had several 3.8'* all had the intake issue...now I am looking at a 2005 Park Ave with a 3.8 again...what year if ever did GM fix the intake problem ???

Also looked at a 2009 Lucerne with the 3.9...how does this differ from the 3.8 ?? Does it still have issues ??
goldfinger22 is offline   Reply With Quote
Old 05-24-2013, 07:04 PM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,643
Thanked 997 Times in 774 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Which intake issue? The lower gaskets? They will always have issues as long as they keep using the same plastic garbage for gaskets. If your talking about the upper plenums, Iv'e seen some with the newer style aluminum plenum instead of plastic.
Mike is offline   Reply With Quote
Old 05-24-2013, 09:28 PM   #3
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2006
Posts: 471
Thanks: 0
Thanked 1 Time in 1 Post
goldfinger22 is on a distinguished road
Default

Quote:
Originally Posted by Mike1995 View Post
Which intake issue? The lower gaskets? They will always have issues as long as they keep using the same plastic garbage for gaskets. If your talking about the upper plenums, Iv'e seen some with the newer style aluminum plenum instead of plastic.
well what im trying to find out is;

1) what year did GM chg the lower gaskets to the non-problem ones ??

2) what year did GM chg the upper intake so it didnt melt with the egr tube ??

3) what major diff is there between the 3.8 and the 3.9 ?? and are there any problems with the 3.9 like the ones that the 3.8'* have had for years ??
goldfinger22 is offline   Reply With Quote
Old 05-24-2013, 09:58 PM   #4
Senior Member
Posts like a Camaro
 
rjblazer's Avatar
 
Join Date: Jan 2010
Location: Elmira, New York
Posts: 853
Thanked 31 Times in 29 Posts
rjblazer has a spectacular aura aboutrjblazer has a spectacular aura about
Default

2007 Chevy Impala - GM00499101 Engine ASM-3.9L V6, Part 5, Manifolds
They started them in 2007 from the research I found. The oil pans are aluminum. It looks like they don't have coolant running though the plenum and I don't see a egr on them. It look like the 3.9 is a totally different engine from the 3.8.
rjblazer is offline   Reply With Quote
Old 05-24-2013, 09:59 PM   #5
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

the 3.9 is a completely different animal. in the 3.4 series they started making the good gaskets in late 03.
jwfirebird is offline   Reply With Quote
Old 05-24-2013, 10:10 PM   #6
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

3.8 is like a sbc, 2 valve single cam simple reliable engine with like 200hp, the 3.9 is the up to date vvt engine that employs all the latest tricks for efficiency. has about 240hp
jwfirebird is offline   Reply With Quote
Old 05-25-2013, 01:18 AM   #7
Senior Member
Posts like a Turbo
 
Join Date: Mar 2013
Location: Florida
Posts: 206
Thanked 0 Times in 0 Posts
johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer
Default

The intake gaskets are not that big of a deal to change, if you get a 3.8, just plan on replacing them to start with.. after you install a quality lower and upper... your good to go.. why risk it.. then you know what you have going on in the engine.. 3.8 series are getting old... plenty of parts available, cheaper than most anything else to repair

I purchased an 97 eighty eight last fall..only had 41k on it.. but with cars over 15 years old need a special attention to gaskets and cooling system.. I replaced radiator, heater core, hoses, belt, intake gaskets and antifreeze.. I don't have to worry about coolant loss or overheating for a long time... and car is reliable to drive anywhere
johnblazer is offline   Reply With Quote
Old 05-25-2013, 08:44 AM   #8
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2006
Posts: 471
Thanks: 0
Thanked 1 Time in 1 Post
goldfinger22 is on a distinguished road
Default

Quote:
Originally Posted by johnblazer View Post
The intake gaskets are not that big of a deal to change, if you get a 3.8, just plan on replacing them to start with.. after you install a quality lower and upper... your good to go.. why risk it.. then you know what you have going on in the engine.. 3.8 series are getting old... plenty of parts available, cheaper than most anything else to repair

I purchased an 97 eighty eight last fall..only had 41k on it.. but with cars over 15 years old need a special attention to gaskets and cooling system.. I replaced radiator, heater core, hoses, belt, intake gaskets and antifreeze.. I don't have to worry about coolant loss or overheating for a long time... and car is reliable to drive anywhere
I guess what I keep tring to find out is, DID GM change the lower gaskets in a certain ear and start using the good ones ??

Also did the do the same with the upper intake ??

AND is the 3.9 plagued with the same issues ??

I know the are not that big a deal but still an issue to be dealt with...Noone seems to be able to sa " Ok GM started using the new metal LIM gaskets in 2XXX and redesigned the intake in 2XXX
goldfinger22 is offline   Reply With Quote
Old 05-25-2013, 09:43 AM   #9
Senior Member
Posts like a Turbo
 
Join Date: Mar 2013
Location: Florida
Posts: 206
Thanked 0 Times in 0 Posts
johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer johnblazer
Default

your question was addressed in previous posts
johnblazer is offline   Reply With Quote
Old 05-25-2013, 01:06 PM   #10
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2006
Posts: 471
Thanks: 0
Thanked 1 Time in 1 Post
goldfinger22 is on a distinguished road
Default

Quote:
Originally Posted by johnblazer View Post
your question was addressed in previous posts
not really
goldfinger22 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Diff between trans onesweetride 1992-1999 3 03-24-2010 05:58 PM
98 Bonnie, diff between MAF and MAP and where are they goldfinger22 1992-1999 3 03-04-2008 12:41 AM
Whats the diff between a 4T60E and and HD? bigerik General GM Chat 2 05-23-2007 10:04 PM
Diff. Between 92 SE, SSE, SSEI, and SLE 92BonneSE General GM Chat 10 12-17-2005 11:20 AM
Whats the diff between the SE and SSEi electronics. JrFaust 1992-1999 2 08-03-2003 08:46 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 08:01 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.