Blew my headgasket a few months ago, finally got things back together and fired her up tonight!




Got a new/used head. 84 Heads ain't cheap and aren't easy to find either. My old one was too thin and didn't want to use a shim. Had serious blowby issues as well so I De-glazed the cylinder walls and re-ringed with Cast Iron rings because the Rock Auto ones I used 25000 miles ago never seated properly. Also put in new connecting rod bearings. Fired her up and have minimal blowby at idle and a slight vacuum when above idle!

 

Right on ya gottr runnin! yer farther ahead than i am! this is 300ultra and i'm just around the corner from ya in union! i just got back from sandy, or. with my repaired long block for my '85! I'll start puttn her back together tomorrow. Keepn my fingers crossed that the 3rd time will be a charm! Got lots of LC gear to go into her this round with a new 38mm weber carb to feed her. guess we'll see what happens when she fires! i'm tryin LC's high torque cam (500+) lift w/ the dual spring kit! Anyways good job on gettr runnin' , hope she breathes lots of fire!

 

Thanks! Drove around for about 30min last night breaking it in, runs great! I'm using a EB 268 cam and Weber 32/36. Wasn't too stoked about having to tear into it after only 25000 on the last rebuild. If the headgasket hadn't blown I would have torn into it anyways to replace those damn rings. There is a thread on here by "TrainwreckedinSeattle" and those Rock Auto rings, so I talked with my machinist and decided on Iron ones. Won't last as long, but considering the mileage I do, should be about oh say.....16 years before I would have to re-ring again! Good luck with your rebuild, hope this one turns out better than the previous ones.

 

I don't know about anybody else but my compression with those rock rings is right at 170psi. this was after 6000-6500 miles.