coolant leak

Asked by motorhead540sc May 23, 2019 at 04:11 PM about the Buick LeSabre

Question type: Maintenance & Repair

can not find where coolant is going, no trace anywhere.  how do you do a pressure check?  loses about a quart on a 400 mile trip

2 Answers

20,795

On my 2002 buick with a 3.8 there's an intake gasket set for the upper plenum that goes bad after 70,000 miles or so , there's a water jacket in it for coolant it may leak internally , maybe the head gaskets are ready to blow , is your mileage and performance dropping also ?

1 people found this helpful.

Thank you. No coolant in oil, trans, tail pipe or on ground. Performance great mileage great. 2004, 3.8 with 117000 miles. From what I understand a top end head and intake gasket set is in the plans for next week. Thank you for your time and info

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