ok so i just assembled my s4tii motor and i put the o-rings on after the washer for the tension bolts. could this cause any problems? ie coolant seepage?

 

yes, they will get ripped and destroyed if you put them on under the bolt head.

find a good one that survived and take it to a hardware store and get some replacements.

if any were damaged they will cause a slow leak from the tension bolt(s).

replace them one at a time so as to not allow the block to lose tension.

 

I would say yes. But it sounds like you are using some sort of aftermarket rig, I've seen the ones that use separate o-rings and I'm not a big fan of them, the OEM washers are all 1 piece and you'd never have this problem with them.

 

probably rotary aviation seals. i have used similar of my own doing but you have to follow instruction.

 

under the bolt head? i put the o-ring on last, so the washer sits flat on the bolt .
i did it like this because of what you mentioned above, but then i read and the instructions said to put the o-ring before the washer

 

Yeah, I'm not really a big fan of anything RA. Too many off-the-shelf mcmaster-carr orings to suit me.

 

true but in retrospect i have had too many OEM seals fail to say either is better. i am a firm believer in viton seals with that said.

don't dis my McM account! OEM is far more suited to the DIYer first time builder, replacements take a little different approach but do work better in my experience, with some exceptions(the OEM tension washer for example are a hard to beat design).

had a 12A dowel seal leak in a short time? coolant seal evaporate when taking a block back apart for some stupid mistake? oil seals last beyond a single time use? yep, not cheap hiccups. those encapsulated coolant seals are also an exception, i only use them on race motors that are torn apart frequently yet they use them in aviation? ugh. they usually only last a few years of itching in street driven cars(heat cycling). maybe they last much longer in those engines that are heat cycled only a few times for very long trips.

if the blue is the o-ring then that is correct and you should be fine. original post sounded backwards in relation.

 

awesome thanks for helping me clear that up guys