21 replies to this topic

[Baynton1991]

I'd probably start with a compression test. Best done when at running temp, but even done cold may shed some light.

 

Ye I will try and get hold of a compression tester from work tomorrow and see what that turns out to be.

[cal844]

 

 

 

its sounding so bad under load. Its fine in neutral through the rev range.

Headgasket then.

Could be the coil(I doubt it as the op adjusted the timing..)

 

 

Had a new coil few weeks back.

 

We bought a new coil for our 998 and it was faulty 

[Baynton1991]

 

 

 

 

its sounding so bad under load. Its fine in neutral through the rev range.

Headgasket then.

Could be the coil(I doubt it as the op adjusted the timing..)

 

 

Had a new coil few weeks back.

 

We bought a new coil for our 998 and it was faulty 

 

My thinking is its the overheating that has caused the issue as the engine was running fine before

[Baynton1991]

So I ended up just removing the head as I finished work early. Ive attached some pictures. Theres some marks in between cylinder 2 + 3. But hasn't completely broken through the gasket?

What do you guys all think?  13672493_10153760321456716_1148423867_n.jpg   56.33K   16 downloads  13867003_10153760314841716_885101778_n.jpg   57.47K   15 downloads

[gazza82]

Did you do a compression test first? That would show if two and three had become one!

 

Lay a metal straight edge on the head face and check it hasn't warped from the overheating. Also check the block face is flat.

[Baynton1991]

Did you do a compression test first? That would show if two and three had become one!

 

Lay a metal straight edge on the head face and check it hasn't warped from the overheating. Also check the block face is flat.

Would've been waiting a week for postage of a compression tester and I was itching to see if it was the head gasket so I pulled it off. Yep will do. Now the carb is off i will give that a good clean as well and check for damage.

[Baynton1991]

but if it turns out not to be the cause I don't know what I'm going to do