Last post on Jul 23, 2010 at 4:36 PM
You are in the Pontiac Bonneville
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Pontiac Bonneville, Sedan
#3625 of 4400 Just received today from GM Canada
Jul 16, 2003 (2:23 pm)
Dear General Motors Customer:
This notice is sent to inform you that General Motors is conducting a voluntary customer satisfaction program that affects certain 2000-2003 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix, Bonneville; Buick Regal, LeSabre and Park Avenue model vehicles equipped with 3800 Series II (L36) V6 engines.
We have learned that your vehicle may develop an engine coolant leak at the upper intake manifold to throttle body gasket, or at the lower intake to upper intake gasket. This condition may result in a low engine coolant level and higher engine temperatures.
To prevent this condition from occurring, your GM dealer will replace the engine throttle body fasteners with redesigned fasteners, and add cooling system sealant to the radiator tank. This service will be performed for you at no charge through July 31, 2005.
If you have already paid for some or all of the cost ... you should contact your dealer to seek reimbursement.... Your request for reimbursement ...must be received by your dealer by July 31, 2004.
"Adding cooling system sealant"? Doesn't sound like much of a fix to me...
Anybody else yet received something similar?
Jul 16, 2003 (3:39 pm)
The Grand Prix sites are posting the same info today. Looks like GM will be paying the price for discontinuing the coolant sealant being added at the plant in the 2000 model run. US owners have to apply for reinbursement to GM. Appears to indicate the the 2000-2003 3.8 leak area was the gaskets and not the manifold itself.
#3627 of 4400 Intake manifold Leak
Jul 26, 2003 (8:00 am)
I have also got the famous letter about the manifold issue (in my case, after a new manifold dropped in at 17000mls).
Has anybody got the service performed? And how about this sealant, what exactly is it and why is it necessary?
Jul 26, 2003 (9:35 am)
During the early part of the 2000 Model run, GM discontinued the practice of adding cooling system sealer to cars at the plant. This was done becuase the discoloration of the coolant overflow tanks was thought to be a consumer turn off. This lead to coolant leaks from the throttle body gasket and upper intake manifold gasket on the 3800. Another potential leak cause in the throttle body area is caused by the nuts becoming loose.
My brother had this procedure done on his Grand Prix on the 12th. The new throttle body nuts have a wider base which turns on the attached nut. So it must distribute and hold torque better. They crushed up the sealant which comes in circular tablets and add it to the radiator.
There are GM engines which require the sealant tablets any time the cooling system is openned. And a friend (also a grand Prix owner) tells me that a retired GM engineer who speaks at the car shows, has always recommended sealnat tablets with anti-freeze changes.
As far as is it needed? GM thought it was before, stopped it, got gasket leaks, and so now thinks it is important enough to pay to have it added.
They also felt there was enough misdiagnosis to send out a bulletin saying that upper intake manifold replacement was not neccessary.
Jul 29, 2003 (10:07 am)
I also received the letter from GM regarding the replacement of throttle body bolts. It goes in tommorrow to have new bolts installed. I talked to the Service Rep and he explained what they do...basically replace the bolts and it takes about 1/2 hour. The Service rep did not see any leaks related to this, however, there was evidence of a previous leak possibly in the upper manifold area not related to the throttle body gasket. The upper manifold (previous) leak was now dry and we decided to keep an eye on it to see if any leaks develope. Current mileage is 15,000 and I still have 2 years left on the warranty. Will let you know how all goes on Wednesday.!
#3630 of 4400 Manifold Recall
Jul 29, 2003 (4:57 pm)
Took my 2002 SLE with 22000 miles in for new throttle body bolts and cooling system sealant today. The actual work took about 30 minutes and the dealer washed the car afterwards. Total time spent was about 40 minutes in all.
While I've been watching for coolant leaks, odors, unusual temperature spurts, etc. that are related to this problem, the Bonnie's manifolds have been solid and I've been lucky to date. However, since reading all of the intake manifold horror stories on this board since last year, it did not take me long to move quickly on this problem, and I would encourage others with Bonnies having a few miles or more to do the same.
#3631 of 4400 too manifold
Jul 30, 2003 (2:27 pm)
I guess the extra cost of the SSEi and it's metal (non-leaking) manifold is another bonus in addition to the extra ponies, it seems to have weathered the manifold problems... Too bad it needs premium! I understand the Canadian manifolds are actually made of a paper mache like substance... designed for cold temps but prone to excessive leaking at any temp above 33 degrees F. The Canadian delivered GXP's are rumored to have tires made out of a pencil eraser type material. Early reports indicate they have very poor traction but leave wicked patches on the road during heavy acceleration and have the ability to actually erase the center lines of the highway. More on this when it's available (Ice take note)!
Jul 30, 2003 (3:13 pm)
Just read in new Automobile mag they estimate price for the GXP at $35k.
Jul 30, 2003 (6:56 pm)
With all the changes, improvements, etc. I would be hard to imagine the price being the same as a 2003 SSEi, but we can hope.
#3634 of 4400 Coolant Loss
Aug 01, 2003 (8:33 am)
My SSEi should not suffer from the manifold coolant leak problem of the normally aspirated 3800, but I seem to be losing coolant very slowly. Since I only drive the car 3,000-5,000 miles a year, it's hard to tell how quickly the coolant is disappearing, but in the past two years I've added coolant once and the oil change tech added coolant at least once (that I saw). Each time the recovery tank was at or below the COLD mark when the engine was hot (parked on level ground), and nearly dry when cold. Last time I checked, it is almost back down to being at COLD when the engine is hot. There is no evidence of a leak, of course. What can explain this?