5 replies to this topic

[slobberdog]

Hi my hornet was running really poorly all of a sudden. I have resulted in taken the head of. And I reckon the head gasket has failed or maybe the head. It's really sooty on the valves and capped in black rubbish. The spark plugs are really sooty also. There was a bit of water in the oil too. I do have some pics I could email or pm. Any ideas I don't want to just replace the head gasket as I'm worried the head is in a poor state. Maybe it's cracked or warped.

Any ideas thanks jack

[cal844]

Use a new BK450 gasket, and re torque the head after the first heat cycle

[brad-the-bear]

check block and head with a straight edge and torch. as above use BK450 gasket.  

 

bear 

[slobberdog]

These are the pictures I took of the head removed

Attached Files

•  20140409_172833_resized-2.jpg   60.34K   8 downloads
•  20140409_172835_resized.jpg   45.93K   13 downloads
•  20140409_172820_resized.jpg   75K   9 downloads

[slobberdog]

Of will check that tomorrow

[Cooperman]

It is very unusual for a head to crack or warp as it's a cast iron head.

With big-valve, i.e. oversize valve, head there can be cracking between valve seats.