leak at exhaust flange

[skyhighatv]

i had a meltdown on a brand new piston and bore with only 5 hours, i just did a leak down test and i have a leak at the exhaust flange where it bolts to the cylinder-do you guys think this is where my lean condition came from? just to add its a fresh bottom end build also.

[86 Quad R]

how bad was it leaking. if only a little, i dont think it would cause a total meltdown but could cause inconsistancies in tuning

[skyhighatv]

i pulled the fly wheel to see if i had an air leak coming from crank seal and nothing-when i pulled the motor i had no coolant in the system?

[skyhighatv]

i just pulled the cylinder and found a bunch of coolant in the crank-so i guess my head gasket went , please correct me if i am wrong? thanks

[86 Quad R]

its very possible that its the head gasket. which cylinder are you using?

[skyhighatv]

stock jug,88 rod,spacer plate and 86-68.5mm piston

[86 Quad R]

then it must be a head gasket then.

[skyhighatv]

taking my cylinder to the shop today !
should be braking her in this weekend.

[skyhighatv]

taking my cylinder to the shop today !
should be braking her in this weekend.

[86 Quad R]

just noticed that ya added a mod list to your sig............

and i see where you've got a cool head. is it the o-ringed head or the gasket type?

there are various issues that can develope with the seal of the cool head if certain steps or precautions arent taken/addressed.

[skyhighatv]

i always use copper spray, but now im hunting down some three bond 1211 lol!

[wilkin250r]

Originally posted by skyhighatv
i have a leak at the exhaust flange where it bolts to the cylinder-do you guys think this is where my lean condition came from?

No way.

When your exhaust is hooked up, the exhaust flange is just a straight-through hole anyways. If it was pushing or pulling any pressure, it wouldn't do it through a little crack at the bolts, it would do it through the big gaping hole of the pipe.