L36 LIM/UIM coolant port bypass 1995-2005 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Mechanical "If it moves, rotates, spins, pings, shakes, or goes clunk, here's how to fix it -- without duct tape. MAny area's of Mechanical help for our GM produced cars and trucks.

 
 
 
 
Thread Tools Search this Thread
Old 10-30-2012, 07:39 AM   #1
Senior Member
True Car Nut
Thread Starter
 
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 L36 LIM/UIM coolant port bypass 1995-2005

I've read that the reason for the upper intake failure on the 3800 is the coolant that goes through the plastic intake for the throttle body, so when I did my gaskets and manifold for the second time I figured I would block it off. 1/4 inch NPT plugs and NPT tap from harbor freight pn 91395.
before;



I think it was the next drill size up from 7/16 in my drill set.

Iwanted to get the plugs i saw people use on the internet with the allen head but I wasn't able to get them locally so I ground half off the square part. There needed to be less than about 1/8th to fit in the upper intake. I put a bunch of black RTV on it.


Dorman pn 615-180 is the manifold, comes with the gaskets preinstalled, pcv and injector o-rings but not the upper ones so autozone had a oring multipack.

Aluminum intake elbows; another common problem the plastic original ones are like the intake they get hot and brittle and come apart. Dorman pn;47065hp or NAPA bk6601942.


Attached Thumbnails
L36 LIM/UIM coolant port bypass 1995-2005-imag0321.jpg   L36 LIM/UIM coolant port bypass 1995-2005-imag0322.jpg   L36 LIM/UIM coolant port bypass 1995-2005-imag0323.jpg   L36 LIM/UIM coolant port bypass 1995-2005-imag0325.jpg   L36 LIM/UIM coolant port bypass 1995-2005-imag0324.jpg  

jwfirebird is offline  
The Following 2 Users Say Thank You to jwfirebird For This Useful Post:
danihound (01-01-2014), ssei98 (02-17-2014)
 
 
 

Related Topics
Thread Thread Starter Forum Replies Last Post
Need info from someone who HAS done the uim coolant port block goldfinger22 Buick 9 01-27-2012 03:10 PM
Why port L36 LIM? (See inside) agrazela Performance, Brainstorming & Tuning 13 04-16-2008 05:41 PM
UIM and LIM replaced now leaking coolant out of UIM gasket Paul1981 2000-2005 10 12-21-2007 11:05 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 05:26 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.