Water in UIM ??? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-16-2006, 06:44 PM   #11
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Are these the pictures that you are speaking of, that you had put in your signature?

http://photos.yahoo.com/[email protected]

If that is coolant between the EGR stovepipe, and the UIM, no - that is not normal. It appears as if there is coolant in the gasket area where the throttle body attaches, but it is hard to tell if that is where it is leaking, or simply from taking it apart. Who did your manifold work?

That is the IAC, or Idle Air Control valve that you have laying on the coolant reseviour. Most problems with that would show up at idle.

If the O2 sensor has not been changed, it would be a good idea to do so. That would mostly affect gas mileage, however if it is bad enough, it could cause the cat to become plugged which could cause your sluggishness. A service shop could check the back pressure.

Are those metal shavings coming from the AC compressor, or somewhere else? Looking at the clutch in the picture, I don't see anything that would show that it came from that area. It'* a little hard to tell though because the picture is a bit out of focus.
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Old 09-16-2006, 07:15 PM   #12
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Yes those are the pictures. And yes, that is coolant between the stovepipe.

I did the replacement UIM and also changed the LIM gaskets last weekend. I was not able to find the aluminum gasket and got the Fel-pro gaskets as per previous threads.

I do recall that the LIM came with 2 o-rings. At the time i could not locate where these were suppose to be on.

I only put RTV sealant on the corner ends of the LIM. That all the RTV sealant i put. Until today, i put RTV sealant on the UIM TB gasket.

Check the plug and wires (had those replaced not even a month ago), cylinder 5 and 6 where worst. Clean all of them with a rag.

Had the PCV valve and MAP sensor replaced. I

The car idles fine. I punch gas pedle and there is a slight backfire but not consistently noticable.

The metal shaving are coming from, there are traces in the AC clutch end plate, the one that turns when you start the AC.

No difference in performance when the AC is on or off, just the noise stops when the A/C is on.
Sorry about the focus but that the best picture. So next step is to replace O2 sensor! Is there only 1? How can I tell if its CAT.

Do you think i might still have a leak even though the coolant level has been steady for 7 days?
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Old 09-16-2006, 08:14 PM   #13
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Is there a TV (kickdown) cable adjustment for a 98 model??

Just to mention, that the UIM came with a TB gasket already attached to the UIM. Is there suppose to be another gasket.

Again, I appreciate all your help and assistance on this one.
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Old 09-16-2006, 08:21 PM   #14
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No kickdown cable after 1991.

Two o-rings? Were they black? If so, that'* your leak. They go here:


I took this pic last weekend working on EK98'* car.

Without these o-rings, you will leak coolant into the EGR stovepipe primarily (due to suction/vacuum in the UIM), and also to the outside eventually.

Are you using a service manual of any type?

http://www.bonnevilleclub.com/forum/...ic.php?t=62386
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Old 09-16-2006, 08:45 PM   #15
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Have the haynes manual and the APN docs and all info from other threads.

So now what, do i have to take the UIM out again. Will i need new UIM gaskets or can i try to see if those o-rings are there. I did not take the gasket off the UIM, does those o-rings go on the inside of the gasket side facing the UIM. In looking at the UIM with the gasket on, all the "holes" were present with orange seal as per your pics.

Let me know...
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Old 09-16-2006, 08:53 PM   #16
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I have no idea what you have going on under the hood, but it'* obvious you have multiple issues.

It'* also obvious to me you have a coolant leak. What did you torque the TB and UIM to? Did you remove the LIM? Based on what I can figure out so far, it'* obvious you need to tear it apart again. I just wish I was closer to dig into it with you.
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Old 09-16-2006, 09:13 PM   #17
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Yes I did replace the LIM gasket and torque it at (12-86) for both.

I removed the TB today for cleaning and did not torque.
I agree i got mutliple issues. Now that i have missed an o-ring on the UIM. I plan to take it apart again but by doing so do i have to replace ALL the gaskets again. I DO NOT plan on removing the LIM unless you advise me to do so. Are there any O-rings that should of been placed on the LIM gasket.

I thought i had all docs and prepared and did a walk throught the day before. Sorry guys for the trouble. These are the steps that I did last week,

1. APN - UIM replacement kit. http://www.automotivepartsnetwork.co...product=229679
2. LIM replacement kit. Fel-pro #ms95809-1
3. Coolant elbow
4. Fuel Injector o-rings kit from GM Parts
5.Prestone Dexcoolant
6. PCV kit - replaced valve, spring, o-rings
7. MAP sensor

LIM gasket, only put RTV sealant on the end corners.
UIM - gasket was already on the UIM. Placed it on the LIM and torque.
TB - did not have time to clean it out.

Question - the UIM had a black gasket for the TB. Is this sufficient??

not to make excuses for the overlooking of the o-rings but i had 2.5 hours to do this and thats what happens i guess. Also doesnt help if your not a swavy auto techn.
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Old 09-16-2006, 09:18 PM   #18
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Don't worry about the LIM. No rings.

Re-use the UIM and TB gaskets. They've only been in a week.
Black OEM TB gasket is fine by itself.
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Old 09-16-2006, 09:24 PM   #19
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Thank GOD

Should i be applying any RTV sealant to the UIM gasket or leave it as is. Also, in the case i lost the o-rings. Do you have any idea what the size or part # are?

Cheers,
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Old 09-16-2006, 09:28 PM   #20
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I have no idea what o-rings we're even talking about. What package did they come in?

No additional sealant is necessary, but I do suggest smearing some inside the hole in the LIM and accessory bracket where the elbow goes, but you're not digging that deep this time.

Were they larger than the injector rings? Fatter? Color? Do you remember?
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