leaking head

[Money Pit]

I have a pro design cool head and have had it checked by a machine shop and the jugs checked

 

everything is true and not warped. I can get 20 minuites to a ride before the coolant is dumped

 

the cylinders I have been racing this banshee for 4 years it's a 2001 and I bought it brand new

 

this head has been on for 2 years (2nd head). why does this keep happening, does anyone

 

run copper washers on top of the head under the head nuts I'm thinking the nuts are grinding

 

into the aluminum head i can see groves and is giving me a false torque reading. Also I was

 

informed to lube the studs with SAE 30 weight oil this also keeps from a false torque reading

 

any help would be appreciated thanks.

[chevy7398]

I have a pro design cool head and have had it checked by a machine shop and the jugs checked

 

everything is true and not warped. I can get 20 minuites to a ride before the coolant is dumped

 

the cylinders I have been racing this banshee for 4 years it's a 2001 and I bought it brand new

 

this head has been on for 2 years (2nd head). why does this keep happening, does anyone

 

run copper washers on top of the head under the head nuts I'm thinking the nuts are grinding

 

into the aluminum head i can see groves and is giving me a false torque reading. Also I was

 

informed to lube the studs with SAE 30 weight oil this also keeps from a false torque reading

 

any help would be appreciated thanks.

 

 

puttimg lube on the studs gives you a more accurate torgue reading as you are not seeing the added drag from a rusy or dry stud or nut, did you try getting a new oring set instead of using the old ones

[jankab]

I have a pro design cool head and have had it checked by a machine shop and the jugs checked

 

everything is true and not warped. I can get 20 minuites to a ride before the coolant is dumped

 

the cylinders I have been racing this banshee for 4 years it's a 2001 and I bought it brand new

 

this head has been on for 2 years (2nd head). why does this keep happening, does anyone

 

run copper washers on top of the head under the head nuts I'm thinking the nuts are grinding

 

into the aluminum head i can see groves and is giving me a false torque reading. Also I was

 

informed to lube the studs with SAE 30 weight oil this also keeps from a false torque reading

 

any help would be appreciated thanks.

If the head is flat (and has been checked by a machine shop) I bet the cylinders are not

[NYUK]

dump the pro design head. too many o rings, too many spots for something to go wrong. get a head that doesn`t use an o ring for every stud.

[Money Pit]

Which head do you reccomend

[okbeast]

NOSS is a sponsor here on the site, he sells cool-heads and will give you a great deal.

[scooter]

i dont know about pro design but noss heads come with copper washers

[NYUK]

i always thought the trinity head was a good simple design. i like their girdle head.

[Money Pit]

O.K. I've learn't some new information on this site I think the reason the head is leaking is

 

because when I was racing I was rinning VP110 recently I've been running 93 This could explain

 

why I can ride about 20 min before the head lets go pressure is constantly building up

 

but on the flip side it was only one cylinder that keeps getting antifreeze in it

 

could the fuel be the problem I have a set of 22cc domes i'm going to try them with a new

 

0-ring set and I bought some brass washers to put under the head bolts

 

well wish me luck

[banshee9o9]

yeah same thing happened to me o ring on the coolhead fucked up and leaked antifreeze into my cylinders and filled both of my toomeys up talk about a PITA so im switchin out for a NOSS head