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Old 03-09-2017, 11:14 AM
 
1 posts, read 1,357 times
Reputation: 10

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I have a Chevy S10 Blazer 4WD with about 250,000 miles, the engine is original
I do regular oil changes & maintenance... The last time I had her in they said I needed to do an Engine Flush. I have heard Not to do it on newer cars... well that's a mute point, since mine's a 1995
But I've also heard that on an older car it can cause problems with getting gaskets, belts etc. Too clean... that the "gunk" actually keeps things going &held together.
HELP! I don't want to be the victim of an "Up Sell Scam" $89, but I also NEED to keep this car running!
Thanks for any advice you might have
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Old 03-09-2017, 12:35 PM
 
Location: Omaha, NE
149 posts, read 226,463 times
Reputation: 293
Have you changed the oil yourself? I would do so on the next scheduled oil change and see if there is any sort of sludge coming out of oil pan toward the end of draining it. Generally speaking these 'flushes' are useless. Just keep up with scheduled preventative maintenance and get what you can out of the old Blazer. 250k is no spring chicken so replacement will come due sooner than later at any rate though, plan for it.
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Old 03-09-2017, 12:43 PM
 
Location: NE Mississippi
25,569 posts, read 17,275,200 times
Reputation: 37300
I'm not sure what kind of flush they have in mind.

I run Gunk Motor Flush through my 90 GMC every time I change the oil. At over 400,000 miles, that's a lot of changes.
Mine runs like a top. 5.7 Liter engine. Never had any major work, but I do keep it maintained. That means tuned up.

If you gave me the vehicle, the first thing I would do is change the oil and flush it out. In your case, just add a quart of Gunk on the way to get the oil changed.

Certified mechanic since 1978.
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Old 03-26-2017, 08:34 AM
 
8,228 posts, read 14,217,702 times
Reputation: 11233
No help here just wanted to greet another S10 Blazer owner. 1997 with 235,000. I keep the oil changed too at valvoline but also have had a lot of work done. As a matter of fact just but in a new water pump and radiator.
And I would keep doing it forever if it wasn't rusted to s*** (Michigan).
I love mine so much I don't know what to do. I rent cars now if I travel as I dont quite trust it.

Is this a trusted mechanic saying this or ?
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Old 07-18-2017, 12:30 PM
 
Location: Riverside Ca
22,146 posts, read 33,524,353 times
Reputation: 35437
Do not bother with Gunk. Go buy a quart of ATF. Personally on a high mileage engine I would not flush anything. Keep changing the oil. That 4.3 should hit 300k.
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