extra hole on my new GM alluminum LIM gaskets...need advice - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-17-2007, 01:46 AM   #1
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Default extra hole on my new GM alluminum LIM gaskets...need advice

i got my new GM alluminum LIM gaskets and it has and extra hole on both gaskets where theres not a hole on the LIM. i studied the LIM and the gaskets got and extra coolant hole where theres none on the LIM. whats going on? i got the gasket for my 3800 series II at the botom of this page....
http://www.bonnevilleclub.com/forum/...e=article&k=38..
looking at the picture i see another gasket, the rectangular one to the far right was not even included in my bag should i take it back to the dealer and get another one?
hey how do i post a single picture here anyway
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Old 03-17-2007, 02:08 AM   #2
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You want to host your picture aka upload it to a web service like www.photobucket.com
Very easy
Upload the picture, take the URL from the picture go [img] link goes here no spaces[/img]

As for the gasket, the gaskets on my L67 are the same way.
Just seals off that coolant port, as it has no were to flow back into the LIM.
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Old 03-17-2007, 02:17 AM   #3
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As SSEiMatt93 stated, that is normal. Here'* a picture that Bill Buttermore took showing coolant flow. On the top and lower left, you'll see where the coolant passages in the head meets a dead end at the LIM.
Name:  L36LIMwaterflow.jpg
Views: 4
Size:  58.6 KB

The rectangular gasket may be for the coolant cover on the end of the LIM shown here.
Name:  cover.jpg
Views: 5
Size:  69.1 KB

For some reason, that seems to come with the kit for the UIM rather than the lower.
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Old 03-17-2007, 02:22 AM   #4
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ok let try this Name:  ALUMINUMLIM.jpg
Views: 5
Size:  46.8 KB
and ok thats good i have my UIM on the way now...should be here thursday...
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Old 03-17-2007, 11:19 AM   #5
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All of our cars have 'dead' passages.
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Old 03-17-2007, 11:17 PM   #6
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Quote:
Originally Posted by willwren
All of our cars have 'dead' passages.
As well as alot of other cars. Other makes and models all have their dead passages. Even my '71 Ford did. It'* quite normal.
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Old 03-18-2007, 12:10 AM   #7
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ok thanks ...now just waiting on the APN UIM....what rtv should i use with my gaskets and how much? ...have illustrations? and after filling my antifreeze up acording to the drilled hole in the stat and filling up untill i see my coolant at the stat whats the next step in filling it to the needed level and is my UIM back on at this time or what.....i have to flush my coolant sys. how many times? when i do this the car is put back together right? or do i have to take it apart and do the coolant fill correctly thing each time? ...damm thats alot of Q'* hah
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Old 03-18-2007, 12:53 AM   #8
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Filling up your coolant is the last thing you'll be doing. You'll fill up the radiator first and then put the cap back on half way, meaning just the first click; then you'll be adding coolant to the reservoir while it'* burping (big bubbles in reservoir while car'* running). After all the air is out, then you fill to the hot line and tighten your radiator cap to the second click.
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Old 03-18-2007, 01:44 AM   #9
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Old 03-18-2007, 10:53 AM   #10
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Quote:
Originally Posted by MACDRIVE
Filling up your coolant is the last thing you'll be doing. You'll fill up the radiator first and then put the cap back on half way, meaning just the first click; then you'll be adding coolant to the reservoir while it'* burping (big bubbles in reservoir while car'* running). After all the air is out, then you fill to the hot line and tighten your radiator cap to the second click.
Filling the radiator first, traps air in the top of the engine. Especially so when the thermostat is not drilled. The engine must run until the thermostat gets hot enough (usually without benefit of coolant against the pellet) to open and release some of the air. This is not good for new plastic parts and gaskets. That'* why we recommend filling at the thermostat opening first, as described in the Techinfo article linked by willwren above.
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