Overheating and water going in reservoir bottle from radiator

Hello.

Sounds like you possibly have a cylinder head gasket leak or possibly a failing water pump carry out the following test please.

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/symptoms-of-a-bad-water-pump

Hope this helps with your repair, Please keep us updated on your repair outcome and do not hesitate to contact us again for further information or assistance.

Thanks for using 2CarPros.

Dave H

Hello.

Here is another video you may find helpful and a couple of diagrams:

https://www.youtube.com/watch?v=zCR6wahr9FU

Hope this helps with your repair, Please keep us updated on your repair outcome and do not hesitate to contact us again for further information or assistance.

Thanks for using 2CarPros.

Dave H

The problem is with the water going into reserve bottle. On an uphill when I accelerate then it overheats n water starts to bubble in reserve bottle.