Does anyone know the correct size wrench that fits the banjo bolts on the water pipe on the back of the heads- 94z28. I have tried every wrench in my tool box and none of them seem to fit properly. The bolt heads do not feel like they have been rounded off or boogered up. Here is a picture of what I found when I removed the intake. Not a pretty site! Any suggestions on how to best clean out this mess?

 

first vacuumed what would come lose then i used a scraper and had the shop vac goin and on it while cleaned. sucked the stuff up before it could drop into any holes. i have a old crossover in the shop ill wander out in a bit and measure to see.

 

they are 15mm and are a thin bolt head. probly best to use 6 sided.

 

Thanks craby! I tried a 15 but it was not 6 sided. Didn't want to mess the heads of the bolt up so I gave up for today. Was thinking worse case, I could unbolt both heads and have my son help lift both out at one time then tackle it but that would be a pain. Be a few days before I get to work on it again, time for vacation with the family.

 

the worst part is the crossover tries to turn with the bolt and if let go the pipe will get tweeked.