How do I find the right replacement engine??

[Young Guy]

Our 2007 Tahoe is starting to have engine issues on a regular basis, and I think it’s time to replace the engine.

A LITTLE BACKGROUND:

This Tahoe was actually given to me by a family member and thus has significant sentimental value. We’ve only owned the car for 4 years, but its been driven all over the country and fell in love with it. It has 287K miles, has strong a engine, and has given us very few problems. Lately, I’ve been dealing with more and more issues and I know the older it gets, the more repairs it’ll need.

THE PROBLEM:

I don’t understand the process of buying a used/remanufactured engine.

Questions:

*My biggest question is how do I verify the mileage, or quality of the new engine?

*Where do i buy replacement engine from?




I livein Atlanta if that matters.

Thanks in advance for you help.

 

[Doubeleive]

Our 2007 Tahoe is starting to have engine issues on a regular basis, and I think it’s time to replace the engine.

A LITTLE BACKGROUND:

This Tahoe was actually given to me by a family member and thus has significant sentimental value. We’ve only owned the car for 4 years, but its been driven all over the country and fell in love with it. It has 287K miles, has strong a engine, and has given us very few problems. Lately, I’ve been dealing with more and more issues and I know the older it gets, the more repairs it’ll need.

THE PROBLEM:

I don’t understand the process of buying a used/remanufactured engine.

Questions:

*My biggest question is how do I verify the mileage, or quality of the new engine?

*Where do i buy replacement engine from?




I livein Atlanta if that matters.

Thanks in advance for you help.

A replacement engine has to come from a matching 8th VIN number vehicle. Doesn't matter what vehicle it comes out of as long as the 8 vin digit matches yours then it is plug n play, lots of them around. If the vehicle it comes out of was wrecked then it's a pretty safe bet that the engine was running when it crashed

 

[Marky Dissod]

Our 2007 Tahoe is starting to have engine issues on a regular basis, and I think it’s time to replace the engine ...

This is actually pretty vague.
What kind of actual engine issues are you having? Describe in more detail, please.

That said, if you're going to replace your engine, why not upgrade?
If it had a 4.8L LY2, step up to a 5.3L LY5 or LMG.
If it had a 5.3L LY5 / LMG, step up to a 6.0L L76 / LY6 ... better yet, a 6.2L L92 / L9H, if you're feelin' froggy.

Unless you're already REALLY good at getting great gas mileage, you'll net roughly the same MpG with a larger engine,
'cause you'll just drive even more sedately.
Obviously this will require a tune, which you will NOT regret (unless the tuner is a schmuckdiotard).

If the replacement engine has V4 mode hardware, it goes without saying, delete that horseschidt, have a real V8.

 

[mikez71]

If buying used, the recycler usually has the mileage from the odometer. No way to fully verify. I would pull valve covers, and look for clean internals. golden yellow good, brown means they didn't change the oil as often as they should. A compression test to make sure valves/rings are sealing well.

Or buy from a rebuilder with warranty. Then the V4 hardware can be deleted for you already.