mod quad head ?

[road racer]

I have a mod quad cool head with pro design domes. I am having trouble with the outer o rings breaking. Will pro design o rings fit it or do I have to find more mod quad ones ?

[macgillivary]

yup they do i have a modquad head and i just buy the pro design kits

[hamuel]

is The o-ring breaking during install??? or usage? just wondering. how can yah tell it's breaking? ooo and are yah going to use the temp port on the head?

[road racer]

o rings broke during usage and leaked coolant. Not sure why.

[BansheeBillyBob]

that one gets me lol....did ya happen to grease them when u put them in?

[Big Blue]

Did you re torque the head after riding it?

[itsaripper]

Did the oring break into half or did you slice a piece off the side of it?

If the oring broke into half there is something wrong with the oring material. But if you installed it in without greasing it, you could have sliced a piece off. Then when everything gets hot and exspanded you get a leak.

[Hulio-mv]

i had no probs with my modquad head breaking o-rings but i did have trouble geeting coolant to stop coming into the recessed holes ride it tighten it ride it tighten it eventually it stopped but i do have trouble with the plugs coming loose every now and then

[road racer]

The o rings broke in half. Mine leaked around the studs too until I put sealer around the washers.