Switch to high temp brake fluid
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Heel & Toe
Joined: Oct 2005
Posts: 15
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From: Florida
Switch to high temp brake fluid
When switching to a high temp brake fluid like Motul is it necessary to bleed the ABS. If you don't what affect will the mixing of brake fluids with different boiling points have on the resulting boiling point.
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
Well.....it's not necessary to bleed/flush the ABS circuits, but you'll have old DOT 3 in there that probably should be flushed out.
If you flush new Motul into your system, then go out and get into the ABS, the old fluid from the ABS circuits will mix with your Motul, and the result will be that it will degrade your Motul a slight bit.
However, that's exactly the procedure that some of us use when we don't have a Tech 2 to cycle the ABS valves when flushing - flush, go out and do several ABS stops, come back and flush again. Here's a quote from a StopTech document:
The entire document is here:
http://www.stoptech.com/tech_info/wp_bleeding_abs.shtml
Bob
If you flush new Motul into your system, then go out and get into the ABS, the old fluid from the ABS circuits will mix with your Motul, and the result will be that it will degrade your Motul a slight bit.
However, that's exactly the procedure that some of us use when we don't have a Tech 2 to cycle the ABS valves when flushing - flush, go out and do several ABS stops, come back and flush again. Here's a quote from a StopTech document:
But What If I Don't Have The Dealer Service Tool?
If you really feel the need to cycle the valves, but do not have access to a service tool (or if the dealer is not willing to loan theirs) you COULD just replace Step #2 above with "go driving and slam on the brakes a few times to make the ABS work" to purge the used fluid from the unit. This is usually NOT the most efficient nor socially responsible solution, though it seems to work just fine. You still need to bleed the car a second time, but it saves you from procuring the service tool.
If you really feel the need to cycle the valves, but do not have access to a service tool (or if the dealer is not willing to loan theirs) you COULD just replace Step #2 above with "go driving and slam on the brakes a few times to make the ABS work" to purge the used fluid from the unit. This is usually NOT the most efficient nor socially responsible solution, though it seems to work just fine. You still need to bleed the car a second time, but it saves you from procuring the service tool.
http://www.stoptech.com/tech_info/wp_bleeding_abs.shtml
Bob
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
