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changing dot 4 to dot 5
Posted: 18 Jun 2010, 20:33
by xpress
i want to change to dot 5. i just don't fancy having to bother with the dot 4 and replacing it etc.
if i drain it out completely can i just fill up with dot 5, or do i need to do something else?
Re: changing dot 4 to dot 5
Posted: 18 Jun 2010, 20:43
by ronsrecord
think i've had too much to drink already!!
Re: changing dot 4 to dot 5
Posted: 18 Jun 2010, 20:57
by dj biz r
erm i wouldnt know but why areyou changhing it ? got a free bottle off freecycle? but i,d suppose drain flush would be ok but i dont know ,bump
Re: changing dot 4 to dot 5
Posted: 18 Jun 2010, 21:24
by dugcati
As far as I'm aware the main differences is in the boiling point of the fluid - DOT5 should have a very high boiling point as far as I understand it....
Re: changing dot 4 to dot 5
Posted: 18 Jun 2010, 21:30
by xpress
oh hiya biz m8, i need a new caliper front n/s! bummer eh.
Re: changing dot 4 to dot 5
Posted: 18 Jun 2010, 21:34
by moggymorgan
last time i did dot to dot it turned out to be a horse, then me pencil broke.
Re: changing dot 4 to dot 5
Posted: 19 Jun 2010, 00:09
by CovKid
Damn - THATS what it was. Unfortunately I went from 13 to 42 by accident and it came out as some kind of gardening implement. Horse eh? Damn...
Re: changing dot 4 to dot 5
Posted: 19 Jun 2010, 12:52
by SyncroSwede
xpress wrote:i want to change to dot 5.
No you don't. You want to change to DOT 5.1. DOT 5 is silicone based not glycol based and is for specific systems only as it will swell seals on DOT 4/5.1 systems.
I'm not an expert but I don't think mixing 4 & 5.1 is a problem just a little pointless as you will not get the full benefits of the new fluid. Personally, I would not drain and flush but bleed through the brakes & clutch as per the manual until nice clean fluid comes out, run it through the winter then do the same in the spring. Just me though...
Re: changing dot 4 to dot 5
Posted: 20 Jun 2010, 12:56
by xpress
i might use this 5.1 stuff.
how cheap can i purchase thsi amazing 5.1?
Re: changing dot 4 to dot 5
Posted: 20 Jun 2010, 13:25
by SyncroSwede
Halfords DOT 4
Halfords DOT 5.1
I had DOT 5.1 in then I used DOT 4 when I had to top/bleed when I replaced the clutch slave. The DOT 4 was good quality (Wurth) but was free and like I said, they're compatible so on these vehicles I think either is fine.