zzr250 waters just boiling but staying at half temp on gauge

[ir0nslash]

hi guys ,
i have a Kawasaki zzr250 1994
so i did a radiator flush when i stripped my whole bike to repaint it , but after that , it kept blowing pin holes in the metal pipe to the water pump ,
after i fixed that pipe 2 times , it blew a radiator hose , then i repaired that , blew another radiator hose , repaired that , i checked the water pump , all propellers etc was mint ..
i checked the thermostat , that was stuffed as it was open when i took it out so replaced that , brought 2 heat sensors one for radiator and thermostat housing ,
thought i got it went for a ride yesterday , blew another radiator hose , repaired that ,
and its still gaining to much pressure as its foaming out at the filler hose ..

radiator cap doesnt seem to leak water so havent changed that ...

Water seems to be boiling ... but temp doesnt go passed half on gauge

ive spent far to much money on this 250 ... beginning to give up .......

im just so dumb founded what else to check now ..... any advice be helpful thanks

http://i358.photobucket.com/albums/oo23/Luke_VanGeuns/12932923_10156706924355065_1567379131189826006_n_z psmusxhdyx.jpg

http://i358.photobucket.com/albums/oo23/Luke_VanGeuns/12644976_10156418997935065_2980586219214892491_n_z ps7ojbx4dn.jpg

[Crasherfromwayback]

im just so dumb founded what else to check now ..... any advice be helpful thanks

l]

Think you'll find it's done a head gasket and is pressurizing the cooling system. Does the water in ya radiator smell like exhaust gas?

[husaberg]

hi guys ,
i have a Kawasaki zzr250 1994
so i did a radiator flush when i stripped my whole bike to repaint it , but after that , it kept blowing pin holes in the metal pipe to the water pump ,
after i fixed that pipe 2 times , it blew a radiator hose , then i repaired that , blew another radiator hose , repaired that , i checked the water pump , all propellers etc was mint ..
i checked the thermostat , that was stuffed as it was open when i took it out so replaced that , brought 2 heat sensors one for radiator and thermostat housing ,
thought i got it went for a ride yesterday , blew another radiator hose , repaired that ,
and its still gaining to much pressure as its foaming out at the filler hose ..

radiator cap doesnt seem to leak water so havent changed that ...

Water seems to be boiling ... but temp doesnt go passed half on gauge

ive spent 't do seal kits for these pumps do theyfar to much money on this 250 ... beginning to give up .......

im just so dumb founded what else to check now ..... any advice be helpful thanks

http://i358.photobucket.com/albums/oo23/Luke_VanGeuns/12932923_10156706924355065_1567379131189826006_n_z psmusxhdyx.jpg

http://i358.photobucket.com/albums/oo23/Luke_VanGeuns/12644976_10156418997935065_2980586219214892491_n_z ps7ojbx4dn.jpg

After first checking out what crasher posted, with a leak down test, then check the rad cap as it might not be holding pressure.
The pressure of the cooling system effects the temp at which the water will boil. As does the antifreeze.
I just re read the first part of your post, foam isn't good. check it for oil. The same with your oil/fuel.
PS Were you the guy looking for a water pump for one of these a while back?
Kawasaki don't do seal kits for these pumps do they?

[Crasherfromwayback]

Water seems to be boiling ... but temp doesnt go passed half on gauge
]



The pressure of the cooling system effects the temp at which the water will boil. As does the antifreeze.


Correct, but the temp gauge reading only half way def points to the cooling system being pressurized.

[ir0nslash]

unsure about smell i fully cant tell

just opening th cap now its cold but water was still under pressure when i opened it ...

i fully gasket sealed my head gasket when i stripped my bike ..... but thats when i flushed it and having these problems also .....

as i think there was oil coming from the head ... was abit of gasket seal from the previous 10 owners ..... but hadnt had these problems intill i started playing around with it sadly

[Crasherfromwayback]

i fully gasket sealed my head gasket when i stripped my bike ..... but thats when i flushed it and having these problems also .....



Think you're gonna have to whip the head off sorry mate. Check both the head and the cyl for warpage, new gasket required at the very least.

[husaberg]

Correct, but the temp gauge reading only half way def points to the cooling system being pressurized.

Sorry I don't agree, The temp gauge reading at half way points to the water temp being halfway, it has nought to do with system pressure. Temp gauges only read temperature by hysteresis.
They will actually read zero though if there is was no water.
The water temp being half way and the rad cap pressure blow off releasing water may point out a cylinder head leak though or a faulty cap.


unsure about smell i fully cant tell

just opening th cap now its cold but water was still under pressure when i opened it ...

i fully gasket sealed my head gasket when i stripped my bike ..... but thats when i flushed it and having these problems also .....

as i think there was oil coming from the head ... was abit of gasket seal from the previous 10 owners ..... but hadnt had these problems intill i started playing around with it sadly
This is more info..........
Did you use a new gasket, it should not have needed any sealer. It is possible that whatever goop you used may have blocked the waterways its also possible that now the water pump is not pumping any water or is unable to.

[AllanB]

Throw on a new cap. Cheap place to start.

[Crasherfromwayback]

, then check the rad cap as it might not be holding pressure.
The pressure of the cooling system effects the temp at which the water will boil. As does the antifreeze.



Sorry I don't agree, The temp gauge reading at half way points to the water temp being halfway, it has nought to do with system pressure. .

Missed some of your quote last time. The radiator cap has nothing whatsoever to do with the water in his cooling system boiling in this instance. It's not boiling, it's (the cooling system) simply being pressurized by a fucked head gasket.

[ir0nslash]

this is my rusty water feed into top of the head , but its beside the head ... so the head gasket doesnt even interfere it ?? or am i totally wrong ??

and opening the radiator cap and release pressure , doesnt that mean its holding pressure inside?? unsure just asking

http://i358.photobucket.com/albums/oo23/Luke_VanGeuns/12938228_10156707424425065_6252437847577109286_n_z psddprrhv6.jpg

[sidecar bob]

Throw on a new cap. Cheap place to start.

But the system is holding pressure.

[Crasherfromwayback]

this is my rusty water feed into top of the head , but its beside the head ... so the head gasket doesnt even interfere it ?? or am i totally wrong ??

and opening the radiator cap and release pressure , doesnt that mean its holding pressure inside?? unsure just asking

rl]

You're getting yourself confused. Water does indeed go into the engine through that pipe, but that has nothing to do with the head gasket being fucked.

[sidecar bob]

i fully gasket sealed my head gasket when i stripped my bike .....

Amateur mistake.
Head gaskets should go on with all surfaces perfectly clean & dry, not covered in a pile of calf snot of any type.

[husaberg]

Missed some of your quote last time. The radiator cap has nothing whatsoever to do with the water in his cooling system boiling in this instance. It's not boiling, it's (the cooling system) simply being pressurized by a fucked head gasket.

I can only go by what he posts.
He posted
Water seems to be boiling

hi guys ,

radiator cap doesnt seem to leak water so havent changed that ...

Water seems to be boiling ... but temp doesnt go passed half on gauge
url]


I in fact never suggested the water was boiling at all, only that the pressure cap was releasing.
Pressure caps are cheap and easy to replace so it seems silly not to do it first.
I said its likely a head leak, just exactly as you did.

[Crasherfromwayback]

I can only go by what he posts.
He posted
Water seems to be boiling

.

Think the op has got himself a wee bit confused.

[ir0nslash]

sweet as , i am confused thats why i came here haha , im a learner so im learning what i can on my shitter before i get a bigger one, one day ....

head gasket was previously already sealed by someone else . just cleaned it off and resealed it ....

im just confused because the gasket seal doesnt touch the water feed to go in , plus the gasket seal is to seal the head and the seal was bad so i gasket sealed it back to what i thought a gasket seal would be .... it is a 250 , there isnt any holes it would cover up or anything , just the seal around the outside and then 2 seals where spark plugs are .....

god im so confused .....haha

[Crasherfromwayback]

im just confused because the gasket seal doesnt touch the water feed to go in , plus the gasket seal is to seal the head and the seal was bad so i gasket sealed it back to what i thought a gasket seal would be .... it is a 250 , there isnt any holes it would cover up or anything , just the seal around the outside and then 2 seals where spark plugs are .....

god im so confused .....haha

Sounds like you're possibly talking about the rubber tappet cover gasket my friend.

[Woodman]

Take the tube out of the recovery bottle and put it in a see through bottle 3/4 full of water making sure the end of the tube is submerged. Run the engine and see if any bubbles come out of the submerged end of the tube. If they do, then chances are you have a blown head gasket.

[ir0nslash]

Sounds like you're possibly talking about the rubber tappet cover gasket my friend.

ahhh shitt ! your fully right ! thanks for that ...

will try the bottle trick tomorrow thanks alot guys ,

im learning :P

[hayd3n]

if it is the head gasket ..................................

a head gasket replacement requires abit of work,
not mega difficult but hard enough the first time

a broken exhaust stud can be a pain .



find yourself a manual,
if your prepared to do it yourself take your time,
maybe find someone local who can help :)
you will need a torque wrench to tighten the head down
get it wrong and you bend valves :(

clean everything!!!!
you will need a new head gasket and most likely exhaust gaskets
and the head will most likely need skimmed

[Drew]

This has been excruciating to read.

[Grumph]

This has been excruciating to read.

But a damm sight easier than actually replacing the head gasket...

Almost as much swearing though...

[sidecar bob]

But a damm sight easier than actually replacing the head gasket...

Almost as much swearing though...

If it is in fact the head gasket, or possibly some other gasket on the head by the same name:facepalm:

[Drew]

But a damm sight easier than actually replacing the head gasket...

Almost as much swearing though...
Reckon I could have done the gasket in less time than trying to figure out where the confusion is coming from.

[bogan]

Reckon I could have done the gasket in less time than trying to figure out where the confusion is coming from.

Which hasn't done anything to fix the original problem...

Which I can't even, so maybe the OP should post a summary, with a picture or two; then go from there.

[Askor]

Which hasn't done anything to fix the original problem...

Which I can't even, so maybe the OP should post a summary, with a picture or two; then go from there.

TL;DR OP is learning

[actungbaby]

unsure about smell i fully cant tell

just opening th cap now its cold but water was still under pressure when i opened it ...

i fully gasket sealed my head gasket when i stripped my bike ..... but thats when i flushed it and having these problems also .....

as i think there was oil coming from the head ... was abit of gasket seal from the previous 10 owners ..... but hadnt had these problems intill i started playing around with it sadly

prob daft thing to ask , air pockets in the system i know it can affect cars . i just sqweze the hoses add water antfrezze with engine

running

[ir0nslash]

yea im learning , so if ppl have an issue with the laying out ive answered stuff with , ill get you a tissue .....

but yea i thought about the air pocket situation , but ive emptied it and refilled a number of times , running it while filling each time ( because hoses blew out ) , so i dont think its that , ill just have to order a head gasket and fingers crossed if it fixs the issue ,

i will update what the problem was when ive done it all ,

thx guys

[sidecar bob]

I don't need a fuckin tissue you smug little upstart, but I'm sure if you watch a utube clip on how to do a head gasket you will nail it no problems first time, if it is actually the head gasket.

[ir0nslash]

:) haha .. will do thanks