Spend a lot of time and money for my new K22 rotrex build but a shitty part like that supertech block guard cost me 4 pistons lot of money and a lot of frustration.
When started to gather all parts for my build without any research for different block guards decided to go for supertech coz already had valvetrain from them and know that it's a decent company with good products.
After a typical market search ordered from eBay ericperformance shop what was advertised as a k20 block guard early 2013 and last June my K22 engine was ready to roll.
When first startup we had major engine coolant circulating issues and took us more that 2 hours to bleed up the system,we did everything like lift up the front manually pump hoses etc and finally made it work.
Coolant temp was few degrees higher than normal but fan was working and went down so nothing worried me about for what was coming next.
Went to dyno after 500miles breaking period and made a decent 517ps on a dynapack hub dyno and during my first ride with my buddies and some street racing big white smoke came out of my exhaust.
Took off head and pistons from 1 to 4 progressively shrunk and on 3 and 4 were signs of material missing.
Preignition on hot spots due to poor cooling on combustion chamber was the cause.
![Image]()
![Image]()
After some reading here and there found from pictures that there are many different block guards on the market with different shapes and the one I got was the most restrictive to coolant circulation.
This is what used
![Image]()
Here is what should have used
![Image]()
After all that I learned my lesson for the future when searching for parts.
When started to gather all parts for my build without any research for different block guards decided to go for supertech coz already had valvetrain from them and know that it's a decent company with good products.
After a typical market search ordered from eBay ericperformance shop what was advertised as a k20 block guard early 2013 and last June my K22 engine was ready to roll.
When first startup we had major engine coolant circulating issues and took us more that 2 hours to bleed up the system,we did everything like lift up the front manually pump hoses etc and finally made it work.
Coolant temp was few degrees higher than normal but fan was working and went down so nothing worried me about for what was coming next.
Went to dyno after 500miles breaking period and made a decent 517ps on a dynapack hub dyno and during my first ride with my buddies and some street racing big white smoke came out of my exhaust.
Took off head and pistons from 1 to 4 progressively shrunk and on 3 and 4 were signs of material missing.
Preignition on hot spots due to poor cooling on combustion chamber was the cause.
After some reading here and there found from pictures that there are many different block guards on the market with different shapes and the one I got was the most restrictive to coolant circulation.
This is what used
Here is what should have used
After all that I learned my lesson for the future when searching for parts.
