as most of you know ive been having head gasket issues. pulled the motor out of the car and completely apart last night. pistons couldnt look any better, and neither could the bearings. pretty happy about that.

dropped sleeves are bad.

so needless to say i found the problem. now here is my question......

my block is 85mm bore. i got the block out of a parts car i bought, it was originally an all motor block. so regarding a 85mm headgasket.....

ive saved all of my F'ed up gaskets.....from differnt companies that sell 85mm gaskets. not going to get into brand names because its meaningless to my question.

block measures out to 85mm perfect.
HG #1 (85mm) measured out to be 84.75
HG #2 (85mm) measured out to be 85.15
HG #3 (OEM B20) measured out to be 84.70 (never used still in the packaging)

so the question is...i usually have a few B20 gaskets laying around....and if not the dealer stocks them and i don thave to rush around and over night everything. im going to measure another one and see if it measures out a little bigger than 84 as well. so i guess my question is...will that SLIGHT amount of over hang have any effects on anything? since its round the amount of over hang will be cut in half. setting the OEM gasket onto the block you cant visually tell a difference.

also..when you order an 85mm headgasket its not exactly what you get. all the gaskets tested were reputable companies as well.

thanks for any input..this whole headgasket thing has turned into the biggest headache ever. hopefully i can actually turn the boost up a little bit after i get this resolved

 

have the chambers in your head been sized to 85mm, i friend of mine was having problems with blowing gaskets cause of the slight over hang he had. fixed it and hasnt had a problem since. good luck

 

the cyl. in a stock B20 can be bored to 84.5 so i don't see why not. they are all slightly oversized to allow for boring

 

Golden eagle sells stock gaskets that are laser cut to the right bore size.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cubish &raquo;</TD></TR><TR><TD CLASS="quote">have the chambers in your head been sized to 85mm, i friend of mine was having problems with blowing gaskets cause of the slight over hang he had. fixed it and hasnt had a problem since. good luck </TD></TR></TABLE>

is it more of an issue with the head being opened aswell? rather than just the block overbore

 

I've never had issues with headgasket overhang. As long as the proper torque is applied and the deck and head are square you should not have a problem. I don't even O-ring and have not had a blowout yet. 30-35PSI strong.

 

a while back i ran a bore size of 87.5 and ran a stock 87mm hg for about 1 year. it ran fine until that motor det.

this is in reverse to what you were asking though

 

Joe,
Do you know piston deck height yet. I've run overhung gaskets but if the piston isn't far enough down in the bore, including rockover at TDC, it will hit the gasket.

Jim

 

so the machine shop checked out the block and the sleeve was down about 3 thousanths....great! haha

i just measured another new 84mm headgasket and it came out to 84.59 which is wider than my 85mm. looking at the "85"mm gasket that i just pulled off there was NO sign that the piston was hitting the gasket, and this 84mm is slightly larger so i think it will be good. the motor is in peices so i do not know what the piston deck height is. its time to retire this block, i can't deal with all these headaches anymore.

thanks everybody for the input

 

which company sleeved the block, if you dont mind me asking?

 

ah just some random local machine shop i beleive. its just darton thin linner wussy sleeves......this block came out of an all motor car that i bought as a parts car, so i didnt have the block directly sleeved myself.

as ive said time and time again....when i put this car together it was a daily driver i was hoping for some 10.80 pass's on. the very very first pass in the car it went 10.7 and i was like hmmm maybe im on to something. it progressivly got faster every race with very minimal if any changes....just more seat time. boost and timing have been very very low all season and untill the sleeve issue happened the car was maitnance free.

if all goes well next season i will have something put together with the intentions of going fast ive learned more than i could ever imagine this year, and have met and talked to a lot of awesome people who i can't thank enough for the help, comments, and advice. i dont know if anybody on here is as excited for next season as i am

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">ah just some random local machine shop i beleive. its just darton thin linner wussy sleeves......this block came out of an all motor car that i bought as a parts car, so i didnt have the block directly sleeved myself.
</TD></TR></TABLE>

Let me guess... DS-200 those are what's in mine right now (H22)

 

could someone post up pics of their DS-200 sleeves? Wondering if this is what I have...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SuperTeg95 &raquo;</TD></TR><TR><TD CLASS="quote">could someone post up pics of their DS-200 sleeves? Wondering if this is what I have...</TD></TR></TABLE>

it looks just like the stock liner but they are ductile iron

here is the block im using....block guard and DS-200 sleeves. It was given through a trade ...



Modified by 93H22ACX at 5:02 PM 7/13/2005

 

yea those are the sleeves but im not running a block guard. in the middle of putting the motor back together as we speak, so looks like making some fast pass's this weekend is possible

i WILL go 9's on stock axles!

 

good luck man, i've had nothing but trouble w/ head gaskets too. learned the hard way that some of the aftermarket one's arent what they are supposed to be!

 

about the gasket overhang, on a honda chamber do you guys spot face the head to the bore size? I would think that a decent amount of overhang might be a potential hot spot leading to preignition... I couldnt guess what amount it would take (84.59mm gasket would hang out like 8 thousandths the whole way around) but its just something I figured I'd throw out there.

 

I have the same setup sitting around haha

 

i dropped those same sleeves in my last setup

 

did they do a step deck on the block. it will help seal the chambers and a little over hang is ok!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lugnuts &raquo;</TD></TR><TR><TD CLASS="quote">about the gasket overhang, on a honda chamber do you guys spot face the head to the bore size? I would think that a decent amount of overhang might be a potential hot spot leading to preignition... I couldnt guess what amount it would take (84.59mm gasket would hang out like 8 thousandths the whole way around) but its just something I figured I'd throw out there.</TD></TR></TABLE>

what i first thought about when i started reading this thread. this is also why i am against o ringing the block. i think that it is harder to dissipate the heat through the o rings than it is if the space occupied by the o ring was just metal from the block casting.

 

I have had some of the same issues you are having with your car and have found that some of the headgaskets I have used were actually smaller then what they were supposed to be.

Thanks to my boy for fixing the problem!