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Don 'Mo Lurch'
Don 'Mo Lurch', Buick Mechanic
Category: Buick
Satisfied Customers: 20956
Experience:  GM, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
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I'm replacing the heater core in my 2007 Buick LaCrosse cxl.

Customer Question

I'm replacing the heater core in my 2007 Buick LaCrosse cxl.
I'm confused about a couple particular steps in this procedure:
9. Remove the heater air outlet cover heat stakes (1) with a small chisel
12. Remove the heater air cover heat stakes (1) with a small chisel
Why am I being directed to drill from inside the heater core cover the dimples adjacent to heat stakes?
Submitted: 7 months ago.
Category: Buick
Expert:  Don 'Mo Lurch' replied 7 months ago.

Hi......sorry for the delay...

.

Remove the heater air outlet cover heat stakes (1) with a small chisel.
Heat Stakes are like "pins" that hold the cover, instead of screws
Use a sharp thin chisel, hot knife or soldering iron to heat & remove

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Remove the heater air cover heat stakes (1) with a small chisel

same as above
.
NOTE: the Heat Stakes can be a pain, just make sure it is a "sharp" thin chisel

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Why am I being directed to drill from inside the heater core cover the dimples adjacent to heat stakes?

you drill out marked spot next to old stake position and use new #6 or #8 3/4" sheet metal screws to re-fasten shroud
GM Instructions does not show that, as it is a misprint, but once you see it, you will see why

Customer: replied 7 months ago.
Oookay
Here I go!
Customer: replied 7 months ago.
I'mma start now.....
Expert:  Don 'Mo Lurch' replied 7 months ago.

thanks

.

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The question will still remain open for follow up questions if needed.
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If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT today.
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Customer: replied 7 months ago.
Are those "stake" pins like pop rivets?
Expert:  Don 'Mo Lurch' replied 7 months ago.

yes............

located as shown in procedures

Customer: replied 7 months ago.
I can't use a flush chemical to flush can I?
Expert:  Don 'Mo Lurch' replied 7 months ago.

And I can't use a flush chemical to flush can I?
??

sorry.......you never mentioned flushing the Heater Core??
Yes you can Flush the Heater Core using the correct Flush agent, available at most Auto Parts Stores or using DEX-COOL
So are you going to Flush or R & R?

Customer: replied 7 months ago.
My bad!
I just got this car and the heater core leaked all over the floor carpet last Friday. I was out of town and it happened on my return. I didn't know what that smell was until it got worse; it seems the people who had the car last used some product as an anti-leak agent.
Expert:  Don 'Mo Lurch' replied 7 months ago.

IF it is leaking......Replace...........do not Flush, unless you want to flush the engine only

Customer: replied 7 months ago.
I do wanna flush the engine only
Expert:  Don 'Mo Lurch' replied 7 months ago.

you would disconnect the Radiator Hoses & Heater Hoses & "connect together" with a "T" (some Auto Parts Stores will have), & "back flush" from the "T" out thru the Radiator Hoses
You can use a chemical or plain water with pressure

Customer: replied 7 months ago.
Will a 25-35 watt soldering iron work on those stakes?
Customer: replied 7 months ago.
Another dumb question: Do I drill next to where EVery stake was?
Expert:  Don 'Mo Lurch' replied 7 months ago.

it will take a while with that iron
quicker to chisel

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sorry.....I thought you had the Factory Manual Instructions & Diagrams.......
do you?
IF not I can post the complete procedure & diagrams

Customer: replied 7 months ago.
I subscribe to alldatadiy.com
addiy says to remove the ac climate control; that I did. For the last year I haven't been too impressed with the alldatadiy.
Customer: replied 7 months ago.
Please provide me the whole procedure
Expert:  Don 'Mo Lurch' replied 7 months ago.

sorry for the issue with AllData, as they post Factory info & images also, so mine will likely be what you have

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Here is what I show
Click Attachments Below

Expert:  Don 'Mo Lurch' replied 7 months ago.

.
IF you need more information, please ask "prior" to Rating.
.
Please do the right thing and leave a rating, using the rating system, so I may be credited for this Q&A.
.
NOTE: Do NOT Rate on how much TIME you waited, because I am not on 24 / 7 and I answer as soon as I see the question.
The question will still remain open for follow up questions if needed.
.
If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT today.
Please reply and let me know why, so I can help more/better.
.
Rating is very Important to our Service
.

Customer: replied 7 months ago.
I'm wondering.. I guess I should go ahead and pull the dash out? I already have both left and right dash close-out panels out. The vcim is out. the rear ducts are out.
Expert:  Don 'Mo Lurch' replied 7 months ago.

sorry for the delay............
IF the Heater Core is leaking, you don't have to many choices
R & R, (apprx 5 hour job) or disconnect or get rid of vehicle

Customer: replied 7 months ago.
I'm not satisfied.
Expert:  Don 'Mo Lurch' replied 7 months ago.

sorry....not satisfied in what?

Expert:  Don 'Mo Lurch' replied 7 months ago.

I answered all of your questions & supplied you with what you asked
Please explain the dissatisfaction.......

thanks

Customer: replied 7 months ago.
IF the Heater Core is leaking, you don't have to many choices
R & R, (apprx 5 hour job) or disconnect or get rid of vehicle
Why pay to be told that I should take it to a shop or get rid of the vehicle??
Expert:  Don 'Mo Lurch' replied 7 months ago.

George..........I NEVER implied or said to take it to a Shop
You posted:
'm wondering.. I guess I should go ahead and pull the dash out? I already have both left and right dash close-out panels out. The vcim is out. the rear ducts are out.

.

I was just adding that you either want to repair or leave as is & disconnect.
Sorry...no disrespect, but how else did you want me to respond........
This is no "easy job" & when I am told that the person "guesses they will continue", then what was your response for?

.

Customer: replied 7 months ago.
I have the vehicle interior gutted out as specified in the sources I access and the information you provided. I did everything specified and still can't see all the stakes on the outer cover. Is there something I'm missing?
Expert:  Don 'Mo Lurch' replied 7 months ago.

the stakes are in the specified areas
They are covered with plastic, this is why I use a hot knife or chisel, but chisel is a little harder, as you have to break the plastic loose

Customer: replied 7 months ago.
How do I get to them if the dash is in my way?
Expert:  Don 'Mo Lurch' replied 7 months ago.

IF you have removed all the components the GM Instructions has shown, then you should be able to see the area where the stakes are & should have enough room to get a chsel or heat knife in .......It takes a little maneuvering, to get your arms & hands in, but it is done that way.