Head gasket go boom .....

[blowin 4]

Originally Posted by bimmerboy98

cometic.com, cost $160 ships friday

wth cometic told me 198.00 .$ 39 more to make it a 86 bore im calling right know...lol

[dave45056]

I am not impressed with Cometic.
http://www.318ti.org/forum/showthread.php?t=22701

[blowin 4]

Originally Posted by dave45056

I am not impressed with Cometic.
http://www.318ti.org/forum/showthread.php?t=22701

i used both the .70 and .08 cometic on my old m 44 and had no problem but i also torqued the head to 85 lbs with apr bolts around 2005 when i started getting into 1 4 there was no h.g for bmw i made a cooper gasket that never sealed after 6 times off removing the head i used cooper spray and 90 lbs in it finally sealed i now hang that gasket in my garage to remind me of all the hard times pulling the head off and staying up till 2am working on my car ...matter of fact i will take a pic in post it...it all comes down to ar finish and torque ...

[dave45056]

The bolts for the head are M10. Maximum torque for a 12.9 grade bolt is 64 lb-ft.
ARP may have a bolt with superior mechanical properties because they say the can go to 70 lb-ft.
Going higher will just stretch the bolt more.
Just my $0.02

[blowin 4]

i dont know what to tell u it worked for me ... when i install my cometic im torquing it to 85 i use 11 mm head bolt that mm re drilled in tapped my head . some times you have to go beyond every thing and experiment for your shelf.. i told mm that that stock gasket would never hold up but i knew better and trusted them come on 25 years in the bmw life dont let a few bad cosemtic h.g get you down do yr research all hi performance racer use it nascars hpf 10000 rwhp btw teddy told me 2.1 stroker would max at 300 rwhp lmfao they dont even have a clue plus most of there builds are na i dont even know why i even bother posting just makes me look bad. i made 416 rwhp after installing my knew water / air intercooler 25.5 psi gt 3076 r turbo 75 lbs intectors 91 pump and 50/50 meth .

[blowin 4]

Originally Posted by dave45056

I am not impressed with Cometic.
http://www.318ti.org/forum/showthread.php?t=22701

[pdxmotorhead]

Used to use them (Cometic) as well, got tired of leaking gaskets..
They seem to be hit or miss as to sealing to aluminum heads.

Just my experience...

Dave

[blowin 4]

Originally Posted by pdxmotorhead

Used to use them (Cometic) as well, got tired of leaking gaskets..
They seem to be hit or miss as to sealing to aluminum heads.

Just my experience...

Dave

ill let you know if i have a bad experience my block A R is smooth as a babies but hahhaha .

[pdxmotorhead]

The issue has been the gasket delaminating on our little 1500 cc nissans we rent for school cars. The cars only have 10:1 and running a standard webber. We switched back to a factory gasket as well. Unfortunately NISMO dropped their comp one that fit our older engines.

Dave

[bimmerboy98]

Im getting mixed signals here, i have always used cometic but i have always driven Ford and Chevy, what is the best gasket to use for the head?

[blowin 4]

Originally Posted by bimmerboy98

Im getting mixed signals here, i have always used cometic but i have always driven Ford and Chevy, what is the best gasket to use for the head?

i donnt care what ppl think cometic is known to be the best gasket out there tell that to all the ppl pushing over 1000 whp they'll just laugh the main problem is a warped head or bad block top end performance told me they use victor reiz perfect seal on all there gasket mls builds & never have a issue . same go's for everyone that said mm motor could never make over 400 whp i laugh at them all day ....there right it cant make 400 whp cuz it makes more hahahahhahahaahhahahahha. boosted all day every day i even run a mls on my 300 hp sedoo xrp stage 3 riva racing kit.

[bimmerboy98]

thanks for a straight answer boss, I will continue to use my cometic

[blowin 4]

Originally Posted by blowin 4

i donnt care what ppl think cometic is known to be the best gasket out there tell that to all the ppl pushing over 1000 whp they'll just laugh the main problem is a warped head or bad block top end performance told me they use victor reiz perfect seal on all there gasket mls builds & never have a issue . same go's for everyone that said mm motor could never make over 400 whp i laugh at them all day ....there right it cant make 400 whp cuz it makes more hahahahhahahaahhahahahha. boosted all day every day i even run a mls on my 300 hp sedoo xrp stage 3 riva racing kit.

no problem ill let you know if my head leaks in 2 weeks.

[blowin 4]

Originally Posted by bimmerboy98

thanks for a straight answer boss, I will continue to use my cometic

no problem ill keep u up dated if i nun into any H>G problems.

[xxxJohnBoyxxx]

Originally Posted by blowin 4

So friday i decided to go make videos with my new dash cam on the way home after making a few videos i jumped on the free way was going about 65 mph 4 gear punched it around 5000 rpm boom . 2 hrs later waiting for tow truck .Get home pulled the head piston 1 gasket ring cooper seal let go. as im removing the head bolt's i notice there coming off with little force. i figure its its because the gasket peace is missing i try the rear head its a little hard hummmm so i start checking the torque setting on all the bolts bar is braking at 40lbs on 1/2 piston and 50lbs 3/4 piston bolts ... wtf btw running 20 psi 14 degree time at wot with is not high at all .... mm say they torque the head to 22 lbs then 2 90 degree turns .... last time i did my old motor H.G that came out to give or take 80 lbs not 50 lbs ... the only thing i can come up with is someone forgot to add the last 90 degree final turn .... no big deal im just glad there's no serious damage to the motor !!!! i never really liked the thought that i spent 10 k on a motor that ran a stock head gasket time to order a cometic mls H.G yea i know mm says they had bad experience using them i ran one in my old set up in never blew a gasket !!!also need to get rid of my ebay wastegate be for that lets go and ends up blowing my motor ...ill post pix .

From the pictures below it looks like cylinder number 1 had a detonation under high boost and the head walked on the block. This would also explain head bolts that are loose. Those head bolts stretched when the head picked up off the block. No head gasket on our motors will last if you're stretching bolts and lifting the head. We might need to O-Ring the block if there is enough room between the cylinders? I don't use any bolts on the head that stretch I Use modified M3 bolts that are reusable so there is no stretch factored into torqueing the bolts.