Engine Knocking 1999 Tahoe

10

Asked by BlaccBaby00 Aug 03, 2020 at 03:54 PM about the 1999 Chevrolet Tahoe LT 4-Door 4WD

Question type: Maintenance & Repair

I recently had some issues with my tahoe running
hot and found out it was the water pump but i
continued to drive it adding water before leaving
each time. Finally got it fixed and now my motor
knocks while sitting but more so when
accelerating. Any ideas what's going on?

5 Answers

154,555

When an engine is severely overheated the oil gets very thin, like water, and is ruined. Change your oil and filter immediately! If the knocking persists the bearings in the engine are damaged. Not a cheap fix and, unfortunately, not worth the expense on a vehicle this old. Hope that helps! Jim

1 people found this helpful.
10

I checked all of the symptoms for thrown rods or blown head gaskets or cracked head. For instance no white smoke no bubbles in the water in the radiator no milky substance in the oil cap nor the oil stick no exhaust leak nor sweet smells no coolant smells and its no longer is running hot at all. Its just knocking but the oil idea i havent tried i just added more oil because I've recently had an oil change but will do it again. Any other ideas the motor is also shaking a little harder than usually

1 people found this helpful.
154,555

You can try a heavier weight oil when you do the oil and filter change but if the knocking continues after the oil change, the damage is done. Without proper lubrication the bearings will grind away against the crankshaft causing excessive clearances between the two. That's why you hear the knocking sound. In a short time you will throw a rod if the knocking continues. Hope that helps! Jim

610

You continued to drive knowing water pump was bad , now you hear noise from engine . Turn the radio UP so you won’t here it, and it will take care of itself SOON,

Your Answer:

Tahoe

Looking for a Used Tahoe in your area?

CarGurus has 21,663 nationwide Tahoe listings starting at $2,295.

ZIP:

Own this car?

Share your experience with others.

1999 Chevrolet Tahoe

Review another car

CarGurus Experts

  • #1
    John Carson
    Reputation
    3,560
  • #2
    Rowefast
    Reputation
    2,260
  • #3
    Gene Arnett
    Reputation
    2,150
View All

Know more, shop wisely

Search

Related Models For Sale

Used GMC Yukon
655 Great Deals out of 10,581 listings starting at $3,000
Used Chevrolet Suburban
606 Great Deals out of 12,360 listings starting at $2,588
Used Chevrolet Silverado 1500
4,093 Great Deals out of 131,552 listings starting at $2,390
Used Cadillac Escalade
386 Great Deals out of 6,268 listings starting at $2,000
Used Ford Expedition
792 Great Deals out of 21,093 listings starting at $2,788
Used Ford F-150
5,739 Great Deals out of 124,088 listings starting at $1,995
Used Dodge Durango
642 Great Deals out of 18,066 listings starting at $1,500
Used Ford Explorer
2,122 Great Deals out of 59,461 listings starting at $999
Used GMC Yukon XL
474 Great Deals out of 8,554 listings starting at $2,995
Used GMC Sierra 1500
1,851 Great Deals out of 57,644 listings starting at $2,900
Used Toyota 4Runner
1,057 Great Deals out of 21,997 listings starting at $1,950
Used Jeep Grand Cherokee
2,317 Great Deals out of 44,944 listings starting at $800

Used Cars for Sale

2024 Chevrolet Tahoe For Sale
7,592 listings starting at $52,237
2023 Chevrolet Tahoe For Sale
109 Great Deals out of 2,227 listings starting at $45,990
2022 Chevrolet Tahoe For Sale
113 Great Deals out of 1,393 listings starting at $40,434
2021 Chevrolet Tahoe For Sale
248 Great Deals out of 2,711 listings starting at $32,990
2020 Chevrolet Tahoe For Sale
87 Great Deals out of 780 listings starting at $19,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.