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How does coolant work? Need help.

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Leviathan91 This post is not being displayed because the poster has bad karma. Unhide this post / all posts.

ZRX61
Victor Meldrew



Joined: 05 Nov 2003
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PostPosted: 22:24 - 25 May 2010    Post subject: Reply with quote
If it isn't leaking, it lasts right up to the point you drain it...which reminds me, haven't checked mine in about 3 years...
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DrDonnyBrago
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PostPosted: 22:37 - 25 May 2010    Post subject: Reply with quote
Leviathan91 wrote:
ZRX61 wrote:
If it isn't leaking, it lasts right up to the point you drain it...which reminds me, haven't checked mine in about 3 years...


Sweet well I know thew problem then, cheers. Thumbs Up


As above:

Your cooling system is a pressurised system meaning it wont boil off (your coolant becomes superheated) and it basically never goes down unless there is a leak.

Check your hoses before jumping to conclusions, a blowing head gasket will have a range of symptoms - i.e. white gunky oil from a water emulsion, contaminated coolant (can get a cheap test done at a garage to confirm), leaking coolant, overheating, a fat cloud of steam from your exhaust and your overheating but working after cooling for 10 mins symptom - etc etc.

If you are lucky, it might just be that your coolant system has a big leak and it has all boiled off.

Good luck Thumbs Up .
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Paddy Blake
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PostPosted: 22:43 - 25 May 2010    Post subject: Reply with quote
Coolant will evaporate so needs to be checked monthly at least depending how much you ride the bike.
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Paddy Blake
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PostPosted: 22:48 - 25 May 2010    Post subject: Reply with quote
Could be water pump seal and not head gasket.
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DrDonnyBrago
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PostPosted: 22:51 - 25 May 2010    Post subject: Reply with quote
Leviathan91 wrote:


Hmm, when my 2 stroke oil was changed before there was white in it? I was rather puzzled as it should be pure pink? Either way I have a leak though right? I mean it must be going somewhere? Although deffiantley not on the floor.

Sorry for the noobish comments I am quite cluess. My exhaust would chuck out a LOT of fumes to begin with, but that might just be normal.

So it's leaking none the less? Surley it's the gasket? How else can it leak?


2 stroke oil just gets burnt off and shouldnt be affected by a dodgy head gasket, it gets used up and doesnt require changing in the traditional sense... what bike is this BTW?
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Kaph
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PostPosted: 22:52 - 25 May 2010    Post subject: Reply with quote
Leviathan91 wrote:
Quote:


As above:

Your cooling system is a pressurised system meaning it wont boil off (your coolant becomes superheated) and it basically never goes down unless there is a leak.

Check your hoses before jumping to conclusions, a blowing head gasket will have a range of symptoms - i.e. white gunky oil from a water emulsion, contaminated coolant (can get a cheap test done at a garage to confirm), leaking coolant, overheating, a fat cloud of steam from your exhaust and your overheating but working after cooling for 10 mins symptom - etc etc.

If you are lucky, it might just be that your coolant system has a big leak and it has all boiled off.

Good luck Thumbs Up


Hmm, when my 2 stroke oil was changed before there was white in it? I was rather puzzled as it should be pure pink? Either way I have a leak though right? I mean it must be going somewhere? Although deffiantley not on the floor.

Sorry for the noobish comments I am quite cluess. My exhaust would chuck out a LOT of fumes to begin with, but that might just be normal.

So it's leaking none the less? Surley it's the gasket? How else can it leak?


White in the 2-stroke means water's in there I think, not good.
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Paddy Blake
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PostPosted: 22:55 - 25 May 2010    Post subject: Reply with quote
I think he means gearbox oil was white but maybe not.

Water pump seal.

Last edited by Paddy Blake on 22:57 - 25 May 2010; edited 1 time in total
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Walloper
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PostPosted: 22:58 - 25 May 2010    Post subject: Reply with quote
Paddy Blake wrote:
Coolant will evaporate so needs to be checked monthly at least depending how much you ride the bike.


It can't evaporate from a sealed system unless it is vented due to overheating or system leaks.

The check is really only to ensure there is no leakage or other reson for coolant loss.
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Kaph
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PostPosted: 22:59 - 25 May 2010    Post subject: Reply with quote
I'm realllyyy confused. So the coolant level has dropped? It should be a completely closed system, some will occasionally go into an overflow tank if the RS has one, but it'll be taken back when the pressure drops.

As for changing the 2 stroke, its a total loss system. All the 2 stroke you put in there gets mixed in and burnt.

If the coolant level has dropped by half(!) you have a leak.
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Phoenix
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PostPosted: 22:59 - 25 May 2010    Post subject: Reply with quote
Is it overheating? If it's not then you no doubt have a leak or your radiator cap has failed and isn't holding pressure. If it is overheating then your thermostat could be stuck closed or partially closed and it's boiling off and coming out of the overflow.
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Paddy Blake
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PostPosted: 23:02 - 25 May 2010    Post subject: Reply with quote
Walloper wrote:
Paddy Blake wrote:
Coolant will evaporate so needs to be checked monthly at least depending how much you ride the bike.


It can't evaporate from a sealed system unless it is vented due to overheating or system leaks.

The check is really only to ensure there is no leakage or other reson for coolant loss.

It is not a sealed system.
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Kaph
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PostPosted: 23:04 - 25 May 2010    Post subject: Reply with quote
Leviathan91 wrote:
Phoenix wrote:
Is it overheating? If it's not then you no doubt have a leak or your radiator cap has failed and isn't holding pressure. If it is overheating then your thermostat could be stuck closed or partially closed and it's boiling off and coming out of the overflow.


I have no idea if it's over heating... I dont think so becuase I have a temperature sensor. However that could be inaccurate.. It will fuck at 50-90c.

I think the coolant is deffiantley being used, just being flooded with it.

How difficult would the gasket be to replace? IF, that's the problem.


Head gasket really not that hard. But if it is that causing coolant to go into the cylinder, you'd have a host of issues. If the head gaskets gone, the compression'll be low aswell.
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Walloper
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PostPosted: 23:31 - 25 May 2010    Post subject: Reply with quote
Paddy Blake wrote:
It is not a sealed system.


Would you care to elabourate?

It's a sealed system if there is a cap.

The cap will prevent transfer of gas/fluid between the cooling system and the atmosphere.
Provided there is no overpressurization in the system.

There are no Non-sealed systems fitted to modern motorcycles. The coolant would fall out when cornering.
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ZRX61
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PostPosted: 03:16 - 26 May 2010    Post subject: Reply with quote
Paddy Blake wrote:
Coolant will evaporate

Unless it's a sealed, pressurized system... Wink
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Freaky_1
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PostPosted: 04:24 - 26 May 2010    Post subject: Reply with quote
Easy way to spot a blown head gasket on a water cooled two cycle is to pop the plug, grab a bright light and look down at the top of the piston. If it seems to have been steam cleaned, then it likely has.

This isn't the end all answer, but it's a quick and easy answer in most cases.

Pop your plug and see if there's carbon on the top of the piston. If it's very very clean, then you can just about bet that the head gasket is blown.

However, there is NO reason to not check hoses, cap, w/p, radiator flues, and such (as mentioned by several above), while you're there.

BTW, this will work for four cycle engines as well, but it's much more accurate on an oil burning engine.
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Walloper
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PostPosted: 12:35 - 26 May 2010    Post subject: Reply with quote
Freaky_1 wrote:
Easy way to spot a blown head gasket on a water cooled two cycle is to pop the plug, grab a bright light and look down at the top of the piston. If it seems to have been steam cleaned, then it likely has.

This isn't the end all answer, but it's a quick and easy answer in most cases.

Pop your plug and see if there's carbon on the top of the piston. If it's very very clean, then you can just about bet that the head gasket is blown.

However, there is NO reason to not check hoses, cap, w/p, radiator flues, and such (as mentioned by several above), while you're there.

BTW, this will work for four cycle engines as well, but it's much more accurate on an oil burning engine.


This is a good tip. Thumbs Up

What about the pistons of a Jet engine?? Razz
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Kickstart
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PostPosted: 12:58 - 26 May 2010    Post subject: Reply with quote
Leviathan91 wrote:

RS125, 2001.

But if it's leaking it must be because of the head gasket? What other component would make it leak?


Could be the head gasket, water pump seal, base gasket or even the crankcase halves not correctly sealed together (on the RS engine this can allow water directly from the water pump into the crankcases).

Water pump seal would allow the water into the gearbox, so your gearbox oil would be milky. None of the others would likely allow the oil and water to mix.

If the 2 stroke oil tank is full of pink fluid (like strawberry milkshake) then that is probably a separate issue.

All the best

Keith
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