[captainslow]

hey guys. in terms of changing the coolant on my n54 and the auto tranny fluid do i flush these or change them? thanks

is the only thing i want to flush the coolant? every other fluid you just change it?

[queensfield]

Depends on your mileage. If you doing midway from the recommended mileage of 100K miles and are not experiencing any problems, then a simple drain and fill is probably OK for both. At 100K miles, a flush might be better, particularly if no drain and fill was done earlier. Just my two cents.

[F32Fleet]

Originally Posted by queensfield

Depends on your mileage. If you doing midway from the recommended mileage of 100K miles and are not experiencing any problems, then a simple drain and fill is probably OK for both. At 100K miles, a flush might be better, particularly if no drain and fill was done earlier. Just my two cents.

+1. And if you decide to enlist the use of a flush machine make sure it does not do a back flush but instead relies on the internal pump of the transmission to push the fluid around.

[captainslow]

bump

[captainslow]

Originally Posted by M.Saines

It's highly recommended to flush your fluids, especially your coolant. If your in LA, I can help you get that taken care of for a reasonable price

thats whats confusing me. i always see people saying dont flush fluids just change them. but they say flush the coolant. i dont really get why.

[ska///235i]

so a flush is a full clean out of the liquid?
and a change is just changing whats in the reservor?

a bit confuse here

[F32Fleet]

Originally Posted by ska325xi

so a flush is a full clean out of the liquid?
and a change is just changing whats in the reservor?

a bit confuse here

Flush coolant. Generally do not flush ATF. Better?

[BKV122]

A flush would always be better than a simple drain and fill (change)

[michaelalex17]

Originally Posted by BKV122

A flush would always be better than a simple drain and fill (change)

i could be wrong but i dont think thats necessarily true. i agree with OP i dont know why it seems to be that people always flush the coolant and not just change it. but every other fluid i think if you change it regularly then it is better to change it and not flush it. i think the reason for this is, lets say you have a 1990 ford explorer and then in the year 20012 you want to change the tranny fluid. i think that it would be so old and corroded and what not in the tank that they need to put something in it to really clean it out before putting the new fluid in. the problem with this is that its very strong and can cause leaks and stuff. so if you change your fluid regularly then you will never need to flush it. that all being said i dont know why you cant just change the coolant and you need to flush it.

[queensfield]

You generally flush coolant because flushing under pressure and fluid flow removes any deposits (scales formed by precipitation or corrosion byproducts) inside the tiny crevices of a radiator and elsewhere in the coolant system. A simple drain and fill without the assistance of pressure and flow may not dislodge and remove the tiny deposits that inevitably begin to form. However, if you have been changing the fluids regularly and are experiencing no problems, a simple drain and fill may be sufficient.