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PostPosted: Fri Apr 03, 2015 10:19 am 
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Regardless if it does or not that hole should be plugged correct? I can't see that that hole should be left open, especially seeing it has receiving threads.


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PostPosted: Fri Apr 03, 2015 10:31 am 
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Location: Las Cruces, NM
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Also, it's an SE, so I doubt there is an engine oil cooler on the radiator, only tranny cooler

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PostPosted: Fri Apr 03, 2015 10:41 am 
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I replaced the radiator about 3 years ago and there was no oil cooler incorporated.


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PostPosted: Fri Apr 03, 2015 11:07 am 
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Yep, Matt's right. There's a bracket for the motor mount that bolts in there, so you definitely need that bracket and bolt put back there. The mount bolts to the engine in 2 other spots, one right below the bolt that you're missing, and one to the bottom left of the harmonic balancer. Here are a few pics I shot of my bracket and the bolt. It bolts right under the LIM in the lifter valley, so there's a really good chance that it's in a water jacket being that close to the water pump.

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PostPosted: Fri Apr 03, 2015 11:38 am 
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A bad headgasket could mix oil into the coolant too. Does the oil in the crankcase look the same as the coolant?

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PostPosted: Fri Apr 03, 2015 6:04 pm 
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So I have had my fun for the day. Too all the side components of the the engine bay from intake to water pump to alternator to throttle body, as well as both heads and UIM. I found something amazing when i got to the inner valve cover towards the bulk head. When my old mechanic put the engine in and put the alternator on he used a longer bolt and he screwed the bolt right into the valve cover causing oil to spew out. Ill post pictures in a sec.


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PostPosted: Fri Apr 03, 2015 6:09 pm 
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So far this is what I have gotten to. A friend has a cherry picker and stand I can use so Ill be taking it out shortly to clean it up and get to the LIM. So far aside from the valve cover, everything looks to be fair in shape but wont know until I clean it out and degrease everything. If anyone can advise me to do anything or purchase anything in particular, your input in greatly valued.


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PostPosted: Fri Apr 03, 2015 6:16 pm 
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UIM failure? Check the plastic of the UIM and see if its soft/melt/rotted, if a screw driver or sharp object can be poked through it, that's your problem. BTW, Your mechanic doesn't seem very competent BUT if it makes you feel any better one car I purchased did have the same issues with a bolt being run into/on the valve cover.

I would definitely try to get that coolant mess cleaned out and possibly pour some fresh oil through the engine to try to clean out that milkshake mess.

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PostPosted: Fri Apr 03, 2015 6:25 pm 
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94SilverSSEi wrote:
UIM failure? Check the plastic of the UIM and see if its soft/melt/rotted, if a screw driver or sharp object can be poked through it, that's your problem. BTW, Your mechanic doesn't seem very competent BUT if it makes you feel any better one car I purchased did have the same issues with a bolt being run into/on the valve cover.

I would definitely try to get that coolant mess cleaned out and possibly pour some fresh oil through the engine to try to clean out that milkshake mess.


I plan on cleaning it out asap. need to get a longer extension cord for the shop vac. ill check the gasket but it seemed decent meaning no burn or melting. just pressure wear from sitting in place. Its not warped anywhere. Aside from that to be safe I am getting new gaskets all around, maybe engine master gasket set. they're not priced badly on rock auto.


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PostPosted: Fri Apr 03, 2015 6:26 pm 
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How does the UIM look to you guys? With the crack on the top right where the T.B. goes. Should I get a new UIM for that reason?


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PostPosted: Fri Apr 03, 2015 7:19 pm 
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Oh I hadn't even seen that. That could be due to the heat/coolant damaging the plenum. Yes most definitely replace that plenum, preferably with one that has the metal sleeve for the EGR stovepipe. It's cheap insurance.

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PostPosted: Mon Apr 06, 2015 12:32 pm 
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Hey guys. Sorry I've been away for a bit. Still working on the Bonnie. Waiting for the cherry picker and stand so I can do LIM. I just bought a Buick regal gs. 30k miles on engine. Stage two everything on the car from head to exhaust manifold to msd ignition to large intake, 3.0 pully, after market sunroof control, straight pipe, larger throttle body, new plenum, fel pro all around. More I can't think of off the top of my head. Putting out roughly over 450 hp. So this will be my new daily while I fix mine up. Just ordered a new master gasket set and going to a junkyard to get a new valve cover for my car and to get that bracket that's missing from my engine which was causing a leak. I'll be back more with new pic of the regal. I decided to go with this one because I know the guy personally and I know the car. It's exactly what I have with a supercharger on it. This thing is beautiful.


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PostPosted: Mon Apr 06, 2015 2:42 pm 
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Speaking from experience on this one: Check the LIM/UIM gaskets, that's pretty dang close to what mine looked like when the Lower gave out on Midnight. if those are(were) good then double check to make sure all the elbow joints are sealed and not leaking. If they are good you might have gotten unlucky like me and have to replace the water pump too. Wouldn't hurt to take a look at and give the radiator a good clean too just to be safe. Don't be in a hurry like I was and forget to check to make sure all oil related hoses and whatnot are in good order too!! (Trust me it is not pretty when you forget bout the oil leak at the end). Once that's all done you should just need to do a flush and refill everything and be good to go. anything else and you will have to find someone smarter then me lol! :bhuh:

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PostPosted: Mon Apr 06, 2015 4:25 pm 
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ShaneC wrote:
Speaking from experience on this one: Check the LIM/UIM gaskets, that's pretty dang close to what mine looked like when the Lower gave out on Midnight. if those are(were) good then double check to make sure all the elbow joints are sealed and not leaking. If they are good you might have gotten unlucky like me and have to replace the water pump too. Wouldn't hurt to take a look at and give the radiator a good clean too just to be safe. Don't be in a hurry like I was and forget to check to make sure all oil related hoses and whatnot are in good order too!! (Trust me it is not pretty when you forget bout the oil leak at the end). Once that's all done you should just need to do a flush and refill everything and be good to go. anything else and you will have to find someone smarter then me lol! :bhuh:



Haha thanks man. I appreciate all the advice. Within the next few days or maybe the weekend I'll have the engine out so I an do more of a thorough check of the entire block.


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PostPosted: Tue Apr 07, 2015 8:38 am 
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The fact that the LIM is filled with shake means that there is at least a UIM failure for sure. You won't see the holes in the UIM easily, but if you stick your pinky finger in the EGR hole you can likely feel the damage.

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PostPosted: Tue Apr 07, 2015 1:18 pm 
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Year and Trim: 97.2 40th SLE
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Why not just leave the engine in and do the UIM/LIM?

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PostPosted: Tue Apr 07, 2015 3:24 pm 
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After I thought about it I decided to just lift the car and do it in the car. Would be way less work and much easier to work on.


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PostPosted: Wed Apr 08, 2015 10:14 am 
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Wow! That is some nasty looking mess. Hope the UIM/ LIM gasket solves your problem. I have a new metal stovepiped plenum/ UIM gasket kit on its way, and I am picking up a Fel-Pro LIM gasket kit on my way home from work today.

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PostPosted: Wed Apr 08, 2015 10:49 am 
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That's exactly what I'm getting. Also now having an issue with the exhaust manifold connection. On the the bolts broke clear off so now I have to deal with that.


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PostPosted: Wed Apr 08, 2015 11:25 am 
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PeacefireXooX wrote:
That's exactly what I'm getting. Also now having an issue with the exhaust manifold connection. On the the bolts broke clear off so now I have to deal with that.


Did you soak the bolts in PB blaster or liquid wrench as suggested in the How To? I am about to do the LIM, elbows, etc and was wondering if I will try to leave the crossover exhaust pipe in place...mine looks rusty, but shouldn't be as bad as the northern cars.

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