Hi there,
Attention aspiring/seasoned diagnosticians,
Our ZXR 400 H is overheating after 10 mins of regular road riding.
Have flushed cooling system with clean water.
Have replaced thermostat and radiator cap.
Plastic overflow bottle fills up with boiling water and overflows after 10 min.
Motor runs sweetly, good power,
Good Compression @ 120 psi even across cylinders.
Fan works fine.
We are using appropriate coolant also.
Thankyou for any suggestions.
overheating after 10 mins riding
Moderator: Moderators
- masterofinsanity
- Site Admin
- Posts: 8103
- Joined: Thu Aug 29, 2002 12:36 am
- My Bike: Aprilia Tuono Fighter
- Location: England
- Contact:
Re: overheating after 10 mins riding
have you checked for head gasket sysmptoms?
Don't forget people there is more to the zxr400 than this forum... check out www.zxrworld.co.uk also.
-
- L-plate hell
- Posts: 450
- Joined: Wed Mar 12, 2008 12:37 am
- My Bike: K ZXR400 L2, H Rebel 125
- Location: Hemel Hempstead, Hertfordshire
- Contact:
Re: overheating after 10 mins riding
Hi,
I have a feeling you might have a pipe blockage somewere or the pipes are restriced with crud causing the water not to flow around the bike properly.
Or....... your water pump is shagged.
Hope this helps.
Regards
Rich
I have a feeling you might have a pipe blockage somewere or the pipes are restriced with crud causing the water not to flow around the bike properly.
Or....... your water pump is shagged.
Hope this helps.
Regards
Rich
-
- Posts: 3
- Joined: Sat May 31, 2008 2:53 am
Re: overheating after 10 mins riding
Thanks for replies,
Yea we have a new head gasket on its way, we aren't sure if there is anything wrong with current one though. Just be a pity to pull it to bits unnecessarily. Might have to look into the water pump idea also.
Yea we have a new head gasket on its way, we aren't sure if there is anything wrong with current one though. Just be a pity to pull it to bits unnecessarily. Might have to look into the water pump idea also.
-
- zxr400 oc member
- Posts: 613
- Joined: Sun Oct 21, 2007 12:24 pm
- My Bike: zx7r p6
- Location: Stafford
Re: overheating after 10 mins riding
99% itll be headgasket im afraid. if its overflowing while reading cold on the gauge still then thats the problem.
- masterofinsanity
- Site Admin
- Posts: 8103
- Joined: Thu Aug 29, 2002 12:36 am
- My Bike: Aprilia Tuono Fighter
- Location: England
- Contact:
Re: overheating after 10 mins riding
sounds like its gone on the exhaust side and the heat is boiling the water and pressurising the system hence it spewing out of the expansion box asap.
Don't forget people there is more to the zxr400 than this forum... check out www.zxrworld.co.uk also.
-
- zxr400 oc member
- Posts: 613
- Joined: Sun Oct 21, 2007 12:24 pm
- My Bike: zx7r p6
- Location: Stafford
Re: overheating after 10 mins riding
itll be the engine pressurising the cooling system for sure by the sounds of it.
-
- Posts: 3
- Joined: Sat May 31, 2008 2:53 am
Re: overheating after 10 mins riding
Just pulled the head off and it looks like the gasket is blown between a cylinder and the water jacket.So that has got to be the problem. Just waiting for new one now .