Head gasket needs to be replaced once torqued?
Posted November 16, 2011 - 01:30 PM
I have been working on a WR426F I just recently bought. The engine needed a total rebuild and I have changed all bearings, bought a big bore kit and a used head. After finishing torquing down the head I notice that I have managed to forget to install the cam chain guide that are to be mounted once the cylinder is installed and before the topend.
So my question to you is: Do I need to replace the head gasket when I unbolt the head to install the chain guide?
Posted November 16, 2011 - 04:22 PM
Posted November 16, 2011 - 04:31 PM
Posted November 16, 2011 - 05:26 PM
The right thing would be a new one.Once i did something like you, and couldnt get a new one unless i wanted to wait 8 days, so used the old one. That is still running.. The gasket have much wear tho..
I pulled my head and jug checking for wear and a noise on my YZ426 and bolted everything back together with same gaskets.( I do not recommend doing this.) I torqued everything to spec and bike is ok even after 4 weekends of fun. These gaskets are pretty tough. Again, even though I did it successfully, I dont recommend it. This is a weekend toy for me. If it went down, I would just ride my other toy till i fixed it.
Posted November 16, 2011 - 05:57 PM
Posted November 17, 2011 - 01:40 AM
Appreciate your help!
Posted July 07, 2015 - 09:49 AM
Old thread I know, but this is good news. I notice some seepage around the head gasket after filling the fluids on my rebuild.. no heat cycle yet so I'm going to use the copper spray sealant and re-torque it.