Nissan Note Owners Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
Hello, Ive just checked the brake fluid level on my wifes Note! I removed the cap and held it over the engine bay whilst peering into the brake fluid reservoir then whatever was in the lid dropped down into the engine bay never to be seen again!

How it important is it? Its just the cap left now!
 

·
Registered
Joined
·
1,868 Posts
You have lost the rubber diaphragm/seal. Looks a bit like a top hat in black rubber.

Find the original, or get a new one from Nissan, without it the brake fluid will leak out, and water can get in.

This is a very bad thing.

(The Moon will fall from the sky, cows will stop giving milk, hens won't lay eggs and we wont win any more gold medals in the olympics)

Seriously, a few days won't matter, but it needs replacing.



Edited by: mnl
 

·
Registered
Joined
·
1,868 Posts
BTW,

You can't just cut a seal from rubber sheet, the proper one is actually a concertina.

There is an air hole in the plastic cap, and as the fluid is used up the seal expands downwards by unfolding, so air never touches the brake fluid, and the fluid can't spash out the vent.
 

·
Registered
Joined
·
95 Posts
Am just wondering if i can use dot 5.1 instead of dot 4, they seem the same just dot 5.1 is meant for abs vehicles (supposedly) can anyone provide any info
 

·
Premium Member
Joined
·
7,177 Posts
the specs are in the service book iirc dot 5.1 is normally in high end/performance cars and you cant mix them
 

·
Registered
Joined
·
95 Posts
just thought id ask as some people said that it is the same, but better performance. just wondered if it would be worth it :)
 

·
Registered
Joined
·
53 Posts
<!--if gte mso 9>
<w:Word>
<w:View>Normal</w:View>
<w:Zoom>0</w:Zoom>
<w:punctuationKerning/>
<w:ValidateAgainstSchemas/>
<w:SaveIfInvalid>false</w:SaveIfInvalid>
<w:IgnoreMixed>false</w:IgnoreMixed>
<w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>
<w:Compatibility>
<w:BreakWrappedTables/>
<w:SnapToGridInCell/>
<w:WrapTextWithPunct/>
<w:UseAsianBreakRules/>
<w:DontGrowAutofit/>
</w:Compatibility>
<w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel>
</w:Word>
<!-->

DOT 3: This brake fluid has a glycol base with additives. It
is clear to amber in color. It is hygroscopic (meaning it absorbs moisture) and
has a minimum dry boiling point of 401°F (205°C) minimum and a minimum wet
boiling point of 284°F (140°C). It will absorb 1 to 2 percent of water per year
depending on climate and operating conditions. It is used in most domestic cars
and light trucks in normal driving. It does not require cleaning the system and
it can be mixed with DOT 4 and DOT 5.1 without damage to the system. The
problem with it is that it absorbs moisture out of the air and thereby reduces
its boiling point. It can also damage the paint on a vehicle.



DOT 4: This brake fluid also has a glycol in it but the SAE J1704 specification
considers it to be a borate ester base fluid. Typically in the high performance
fluids, it also contains other additives. It is clear to amber in color. It is
hygroscopic (meaning it absorbs moisture) and has a minimum dry boiling point
is 446°F (230°C) and minimum wet boiling point of 311°F (155°C). It is used in
many European cars; also for vehicles in high-altitude, towing, or highspeed
braking situations, or ABS systems. It does not require cleaning the system and
it can be mixed with DOT 3 without damage to the system. The problem with it is
that it absorbs moisture out of the air and thereby reducing its boiling point,
however it absorbs moisture at a rate slower than DOT 3. It can also damage the
paint on a vehicle.



DOT 5: This brake fluid has a silicone base. It is purple in color. It is NOT
hygroscopic (meaning it cannot and will not moisture) and has a minimum dry
boiling point of 500°F (260°C) and a minimum wet boiling point of 356° (180°C)
It is not used in many brake applications, seeing primary duty in weekend,
antique, and collector cars that sit for long periods and are never driven far.
<b style="mso-bidi-font-weight:normal">It does not mix
with DOT 3, DOT 4, or DOT 5.1[/b]. It will not absorb water and will not
damage the paint on a vehicle. It is also compatible with the same rubber
formulations as the DOT 3, 4 & 5.1 fluids. The problem with it is that it
can easily get air bubbles into the system. The air bubbles are nearly
impossible to remove and result in poor system performance and poor pedal feel.
Although originally developed in the late 1960's by General Electric
specifically for racing, it is unsuitable for racing for a variety of reasons.
If as little as one drop of water enters the fluid, severe localized corrosion,
freezing, or vapor lock may occur. This can happen because water is heavier and
not mixable with silicone fluids. It is unsuitable for ABS.



DOT 5.1: This brake fluid is similar to DOT 4 it has a base comprised primarily
of Borate Ester. Often in the range of 70 - 80%. To meet specification, it also
will contain other additives. It is clear to amber in color. It is hygroscopic
(meaning it absorbs moisture) and has a minimum dry boiling point of 500°F
(260°C) and a minimum wet boiling point of 356°F (180°C) minimum. It is almost
exclusive to Europe, used in high performance
cars. It can be mixed with DOT 3 or DOT 4 without damage to the system. It
maintains higher boiling point than DOT 3 or DOT 4 fluids due to its even
greater borate ester content. It is excellent for severe duty and racing
applications. The problem with it is that it costs more than other fluids and
there is limited availability in the USA. It also absorbs moisture out
of the air and thereby reduces its boiling point. It can also damage the paint
on a vehicle.

<!--if gte mso 9>
<w:LatentStyles DefLockedState="false" LatentStyleCount="156">
</w:LatentStyles>
<!--><!--if !mso>< id=":38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui>

st1\:*{behavior:url(#ieooui) }

<!--><!--if gte mso 10>

/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}

<!-->
 
1 - 7 of 7 Posts
Top