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Old 11-07-2013, 03:25 PM   #1
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Default 3800 UIM / LIM Gaskets Parts etc

Even though when I bought my 97 PA a while ago, previous owner just repaired the Dorman UIM gasket not sure if he did the lower, it seems once every month I am having to add about a cup or two of coolant to the reservoir. I suppose the next step is to pressure test the rad and look for leaks. The oil looks fine with no bubbles or water present. I suppose I should replace both gaskets to be safe in the future.
Question: What are the best current parts / links for this 1997 3800? aluminum gasket?
New metal elbow?
I read Danthurs post form a few years back should I do a bypass?
Help and links greatly appreciated!
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Old 11-07-2013, 03:31 PM   #2
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i got the aluminum elbow and the dorman upper kit and felpro aluminum lower gasket from rockauto. i did the jacket plug so the coolant wont get into the plastic, seems like a bad idea to me for it to even be in there. it has no problems in the cold either.

https://www.gmforum.com/mechanical-1...2005-a-304071/
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Old 11-07-2013, 03:40 PM   #3
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Thanks Justin, Is that new metal elbow with kit or separate?
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Old 11-07-2013, 07:47 PM   #4
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you have to get it separately. but the reason i liked the dorman upper kit is because it had alot with it, the erg things, injector o-rings, the o-rings for the map, etc. they didnt give it enough of the injector ones though not sure what is the deal with that
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Old 11-07-2013, 07:50 PM   #5
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not sure if that link will work but if you do a part number search on rock auto for 47065hp
RockAuto Parts Catalog[ID]=0&ck[idlist]=0&ck[viewcurrency]=USD&ck[PHP_SESSION_ID]=m3peir572vkk6nsglmgmj5k937
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Old 11-07-2013, 09:21 PM   #6
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Quote:
Originally Posted by jwfirebird View Post
i got the aluminum elbow and the dorman upper kit and felpro aluminum lower gasket from rockauto. i did the jacket plug so the coolant wont get into the plastic, seems like a bad idea to me for it to even be in there. it has no problems in the cold either.

https://www.gmforum.com/mechanical-1...2005-a-304071/
Justin, whats the jacket plug? just curious
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Old 11-08-2013, 08:28 AM   #7
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you plug the lower intake manifold water ports to the upper intake so the coolant doesnt get into the plastic and break it down or leak
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Old 11-08-2013, 09:28 PM   #8
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I wonder if anyone makes a non plastic UI Manifold?
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Old 11-08-2013, 09:39 PM   #9
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I wonder if anyone makes a non plastic UI Manifold?
Sure do

A fix for the Series 2/3800 V6 upper intake?

BonnevillePRO.com • View topic - L26 aluminum UIM on L36--Done! With results!!
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Old 11-09-2013, 01:36 PM   #10
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i might do something like that if i wanted to turbo the engine but the new dorman plastic ones come with a revised egr and thicker plastic where it needs it. i think that and blocking the coolant is plenty good for a stock engine
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