So your fluid isn't dot 4 hygroscopic?
bleeding rear caliper
- Thread starter ySo
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
So your fluid isn't dot 4 hygroscopic?
Datatek
Well-Known Member
- Posts
- 44,119
- Location
- Near Poitiers SW France
+1 it was 14 years old in mine. Changing it made a big difference but I suspect that was largely due to the air that came out rather than the fluid. Water in the fluid usually shows up as brake fade as the water in the fluid boils under heavy use.
Datatek
Well-Known Member
- Posts
- 44,119
- Location
- Near Poitiers SW France
If the fluid has water in it, it will produce brake fade even on the flat under heavy use.
- Posts
- 58,170
- Location
- Preston Lancs.
That is because the moisture boils producing steam bubbles effectively putting gas in the system. When it cools braking is back to normal until the heat builds up again. But you would have to be the last of the late brakers and possibly drive like a pratt for that to happen on the flat. A simple moisture tester can be got for a few quid to check it now and again.
Datatek
Well-Known Member
- Posts
- 44,119
- Location
- Near Poitiers SW France
You can do it quite easily on the twisties in an auto unless you are plodding.
- Posts
- 66,761
- Location
- The Wooly Witch
Google is a marvelous thing you know. I have had my P38 for five years it has never had the fluid changed in that time and there is no moisture in it.
Ha ha ... you were lucky with the moisture ...
The OP never gave his location, so he could be in darkest Bradford or Burma so ... *shrug*
Only when you change dodgy fluid, do you realise how bad it was ...
- Posts
- 58,170
- Location
- Preston Lancs.
Ha ha ... you were lucky with the moisture ...
The OP never gave his location, so he could be in darkest Bradford or Burma so ... *shrug*
Only when you change dodgy fluid, do you realise how bad it was ...
Dippy you are a nice lass, but don't tell your granny how to suck eggs there's a good lady. I know it needs changing now and then but your timescales are way off the map. I can only think it came from an article written by a brake fluid salesman.
Last edited:
Thor1950
Well-Known Member
- Posts
- 39,238
- Location
- Land of the midnight sun
Dippy you are a nice lass, but don't tell your granny how to suck eggs there's a good lady. I know it needs changing now and then but your timescales are way off the map. I can only think it came from an article written by a brake fluid salesman.
Snigger
Use Dot 5 brake fluid and should never need to change itfound this google
Some manufacturers still recommend changing brake fluid every two years, some have moved to three- or five-year intervals, and others, as youve noticed, have removed the recommendation for periodic flushing and refilling from their maintenance schedules.
How often should brake fluid be changed? - The Globe and Mail
Snigger
found this google
Some manufacturers still recommend changing brake fluid every two years, some have moved to three- or five-year intervals, and others, as youve noticed, have removed the recommendation for periodic flushing and refilling from their maintenance schedules.
How often should brake fluid be changed? - The Globe and Mail
FAIL
Dot 5 and dot 4 brake fluid do not mix and dot 5 can damage systems not designed for it
- Posts
- 58,170
- Location
- Preston Lancs.
Snigger
found this google
Some manufacturers still recommend changing brake fluid every two years, some have moved to three- or five-year intervals, and others, as you’ve noticed, have removed the recommendation for periodic flushing and refilling from their maintenance schedules.
How often should brake fluid be changed? - The Globe and Mail
Only problem with that is Dot 4 and Dot 5 don't like each other and Dot 5 should not be used where Dot 4 has been. P38s take Dot 4 nothing else should really be used. Putting silicone based Dot 5 in a P38 with Dot 4 in it is asking for trouble. Dot 5.1 should be fine but why not just use the correct fluid?
Last edited:
Proper advice v Thor google advice that is way off
- Posts
- 58,170
- Location
- Preston Lancs.
- Posts
- 66,761
- Location
- The Wooly Witch
Dippy you are a nice lass, but don't tell your granny how to suck eggs there's a good lady. I know it needs changing now and then but your timescales are way off the map. I can only think it came from an article written by a brake fluid salesman.
Stop being a patronising old fart ...
We both know that if you know how the brake 'feels' under your foot and how the vehicle responds to that makes all the difference ...
I don't have a 'pop' at what you know about P38, cos you've forgotten more than most drivers know ...
the changing of fluids varies according to use and environmental factors - end of
we don't know the history of the vehicle the OP is on about or his ability to relay the info he does know
and stop giving the stupid member an idea he knows what he's rabbiting about ... he's dangerous
- Posts
- 58,170
- Location
- Preston Lancs.
Stop being a patronising old fart ...
We both know that if you know how the brake 'feels' under your foot and how the vehicle responds to that makes all the difference ...
I don't have a 'pop' at what you know about P38, cos you've forgotten more than most drivers know ...
the changing of fluids varies according to use and environmental factors - end of
we don't know the history of the vehicle the OP is on about or his ability to relay the info he does know
and stop giving the stupid member an idea he knows what he's rabbiting about ... he's dangerous
One day i will do a thesis on nursing care and send you a copy you might learn something.
- Posts
- 66,761
- Location
- The Wooly Witch
One day i will do a thesis on nursing care and send you a copy you might learn something.
I have learnt as you get older you can still learn new things ...
good isn't it
I look forward to your correspondence in due course ...
blue beasty
Leaks an prone to bits dropping off
- Posts
- 61,352
- Location
- Gloucestercotshirewolds
Wammers got something wrong a few weeks back and the resulting confusion was an emotional roller coaster ride for all concerned, fear and doubt set in, old aquaintances began to mistrust each other, passwords were changed, the price of gold soared as safe investments were sought, reservists were put on stand-by....
A certain degree of patronising is necessary to re-establish forum norms.
There will probably be similar effect when Thor gets something right......
A certain degree of patronising is necessary to re-establish forum norms.
There will probably be similar effect when Thor gets something right......
- Posts
- 66,761
- Location
- The Wooly Witch
- Posts
- 58,170
- Location
- Preston Lancs.
I have learnt as you get older you can still learn new things ...
good isn't it
I look forward to your correspondence in due course ...
- Posts
- 58,170
- Location
- Preston Lancs.
