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Indmar Service Bulletin


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SB2013-1
Water Circulating Pump Replacement on Certain 2012 Model 5.7L Engines
Engines Affected: 21012 Model 5.7L Engines with Serial Numbers from 170158 to 172350

Our engine supplier, General Motors Powertrain, has informed us that certain engines produced during our 2012 model year were built with water circulating pumps that may fail. In July, we issued a Service Advisory, SV2012-3, describing the issue. Since that advisory was issued, we have determined that the appropriate course of action is to inspect all of the pumps on the engines within the serial number group and replace the pumps that are part of the group that GM has identified as potentially defective.

What You Should Do
Inspect all pumps on engines that you have sold or that are in your inventory which fall within the serial number grouping. End user customers whose engines have been properly registered will receive a notification letter informing them of this situation.

To inspect the pump, it must be removed from the engine. There will be a number stamped on the back plate of the pump as shown below (Fig. 1). If the first 5 digits of the number on the pump plate is below 12027, the pump is suspect and must be replaced. If the first 5 digits of the number on the pump plate is 12027 or higher, the pump is OK to reinstall. Please record the engine serial number and the number from the pump backplate on the warranty claim.

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Figure 1 Circulating Pump Back Plate
If the existing pump will be reused, reinstall using two new 551033 water circulating pump gaskets. Torque the circulating pump bolts evenly to 33 lb ft (45 Nm).

If the pump must be replaced, replace the pump using P/N 551045SB. New gaskets are supplied with the pump. Torque the circulating pump bolts evenly to 33 lb ft (45 Nm). Remove and retain the back plate from the pump to be returned with the warranty claim. The rest of the pump can be scrapped.

File the appropriate warranty claim form for the task completed. Form 1 is for units that were inspected and found to be good (ID number 12027 or higher). Form 2 is for units that had ID numbers below 12027 and needed to have the pump replaced.

SB2012-1 Claim Form 1 Instructions
Fill out your dealer information on the claim form. Record the engine serial number on the form. Fax or e-mail a copy of the completed claim form as indicated on the form.

Your dealership will be reimbursed for:
2 P/N 551033 Circulating Pump Gaskets plus shipping.
1 Hour Labor at your Warranty Labor rate

SB2012-1 Claim Form 2 Instructions
Fill out your dealer information on the claim form. Record the engine serial number on the form. Return the claim form and back plate(s) like you would return any other warranty part using the UPS Returns on Web system. If you are unfamiliar with using Returns On Web, contact Indmar Customer Service at 901-353-9930 for assistance. Please write “RMA SB2013-1” on the outside of the box.

Your dealership will be reimbursed for:
1 P/N 551045SB Water Circulating Pump plus shipping.
1 Hour Labor at your Warranty Labor Rate
Downloadwarrantyclaimform.jpg

If you have any questions or concerns, contact Customer Service at Indmar Products:
phone: 800.238.7112 or e-mail: [email protected]indmar.com.

Thank you for your attention to this important matter.


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I was lucky enough to not get this and mine cracked in half. Killing the engine. My dealer was great though and within three weeks in the summer swapped out the entire motor.

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Had mine done today, turned out it was one of the bad pumps. Thanks for posting this, saved me some future aggravation.

Glad to see it was helpful and preventative rather than broken down on the lake.

  • Like 2
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  • 5 years later...

So is this my engine serial number? and if so, can I  contact a local Malibu dealer and get a new pump through them at no cost.  I will take this pump off and look at the numbers on the back of the pump to verify recalled pump. 

32C783E6-DF52-4485-A321-BDAD3CC0F4CA.jpeg

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18 minutes ago, Nick in the TC said:

So is this my engine serial number? and if so, can I  contact a local Malibu dealer and get a new pump through them at no cost.  I will take this pump off and look at the numbers on the back of the pump to verify recalled pump. 

32C783E6-DF52-4485-A321-BDAD3CC0F4CA.jpeg

That's not the right pump.  Your pic is of the raw water pump, but the recall related to the engine circ pump.

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I guess I missed that part.   Is my engine number 171829?  This sticker is on the engine and some parts about 5 times under the dog house. So when I drain for winterization do I need to pull off circulation pump for the numbers listed?

Edited by Nick in the TC
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