Questions tagged [flush]

The action to purge a system of it's fluid either by gravity alone or by using new fluid to displace the old.

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19
votes
6answers
142k views

When is an engine flush a good idea?

I have heard really mixed opinions about the necessity of engine flushes. My quick research suggested that manufactures do not recommend doing them. In addition, I have heard of extreme cases of blown ...
15
votes
2answers
4k views

Brake flush vs. Replacing the brake fluid

Is a brake flush the exact same thing as replacing the brake fluid? Or is there a difference?
6
votes
1answer
21k views

What is the average radiator capacity on 6 cylinder engines?

Yesterday I drained the radiator on a 99 Monte Carlo. Owner's manual states that it should take 11.6 quarts (2.85 gallons). I removed the petcock, flushed the system by running a hose into the top ...
6
votes
1answer
847 views

How to flush coolant with only access to expansion tank?

OPEL CORSA B Sedan 1.6 IE 1999. I would like to flush the coolant and bleed my brakes. For the coolant, I have bought German HEPU antifreeze, Anyways, I only have a reservoir bottle and I do not ...
3
votes
2answers
2k views

To switch back to regular oil (from semi-synthetic), do I have to (or should I) flush the engine first?

I have a 2017 Elantra (nine months old). At my first oil change, the dealership (without my knowledge or CONSENT) out in semi-synthetic oil (which is NOT required or necessarily recommended by the ...
3
votes
1answer
86 views

What is the difference between old engine oil and old gasoline and how it affects a car

This happened in the mid 1990s and something made me think of it right now. A family friend ran out of gas 3 blocks from his house. I think he was driving an early 1970s car (if that matters). He ...
3
votes
2answers
4k views

Using vegetable oil to flush engine of gunk

I've been told by a mechanic friend of mine that AFTER I've used engine flush I can put in vegetable oil, run engine for a short while then drain. He says that as the veg oil is sticky, it'll help ...
3
votes
1answer
31 views

Is it safe to flush it?

I've got a 1989 Chevy Cavalier sedan. 78,000 k. Previous owner let it sit for 7 years. I've drained and replaced the oil, fuel filter, hoses and such. But my coolant tank is completely encrusted in ...
3
votes
1answer
85 views

How often and how thorough should a coolant flush be?

I have a 2005 Mazda Bounty UTE. How often should it have a coolant flush? I have since seen videos which suggests a flush should be a number of cycles of empty, new water, empty, new water, empty etc ...
3
votes
0answers
1k views

What else should be changed if I already have the oil pan off for cleaning?

I have a 2005 Chevy Suburban 1500 4WD 5.3L with 187000+ miles. It has a really bad tapping/knocking sound. I think this is the infamous lifter knock, and was caused by infrequent oil changes and ...
2
votes
1answer
345 views

How should I flush out a head gasket sealer?

I purchased a 2002 Ford Taurus, little knowing that it had a head gasket leak. After it was driven for a week or so it started overheating. I am assuming that the person that I bought it from put ...
2
votes
0answers
54 views

Stuck in catch-22 trying to fix radiator leak

I'm trying to use a stop-leak solution to fix a leak in the radiator, but I'm stuck in a catch-22. The stop-leak instructions say to flush the coolant system if it is dirty or clogged. I don't know ...
1
vote
1answer
56 views

Should an automatic transaxle be pressure flushed?

The statement "Never pressure flush the CD4E..." worries me a bit. Should it?
1
vote
1answer
92 views

How to flush a cooling system after head gasket failure?

I recently replaced the head gasket in my Renault K9K (700) 1.5 DCi, due to a cylinder/cooling system type failure. As such, the cooling system is full of partially burned diesel. Despite having ...
1
vote
1answer
4k views

Is engine flush safe and should I do it?

Garage put some oil in car and after I checked the dipstick it looked black and thick. Car has since been running sluggish and the cause might be the oil(though this work followed an overheating ...
0
votes
0answers
30 views

Flushed my Engine on a 2010 Altima

I stupidly was sold an engine flush on the 2010 altima with 160k miles. I am just wondering if I can expect my car to die in the next week or 2, or is it possible that it wont harm my car and I will ...