why do i keep blowing headgaskets??!

[nando]

how about o-ringing the block?

how have you tuned your timing map? could it be knocking?

what about ARP studs instead of metric blues?

[bernzpeed]

so u might not be operating in the right temperature, have you checked the radiator, coolant and was it bled completely?

[dmjensen]

yup, my dad is bringing one home from school. (shop teacher)

i'll check it and if it is not the head what else would cause this? or is this almost 99.9% the head?

[bimmerteck]

We used a straight edge ruler, but not a feeler gauge.

Not a ruler, a machinist's straight edge. It's a tool used with feeler guages to check if surfaces are in fact, straight.

Straight edge from summit racing

[dmjensen]

Megasquirt pnp from whodwho, no boost spikes, and no mbc its a tial 38mm wastegate with a 1 bar spring

[Zacm829]

I would get it both resurfaced and tested. Better peace of mind.

What management are you running? Any boost spikes? Manual boost controller?

[dmjensen]

This is the second time. So get it pressure tested and possibley resurfaced

[The Humjet]

How many times has this happened to you?
I'd get the head pressure tested and resurfaced. Your not gonna see if your head is warped by eye or with a straight edge ruler. These heads and surfaced to a tight tolerance. I like to make sure everything is within .0005" on each corner when I'm resurfacing heads.
I once had to resurface a head for my parents bmw e46 330i when they blew a head gasket. It pushed up .007" in certain areas, I got it set up on the mill as flat as possible and took a cut. First cut didn't even clean up in some areas you could tell this head was bent like a banana. This was a something I couldn't tell by eye when the head first given to me. Took off .014" for it to eventually clean up so it was completely flat.
If your head is in any shape like my parents cooked e46 then you'll be lifting it in no time.

[dmjensen]

We used a straight edge ruler, but not a feeler gauge.

[bimmerteck]

Did you use a straitedge and a feeler gauge to look for warping or just eyeball it?

[dmjensen]

so i just blew a second headgasket tonight. im tired of this, what did i do wrong? (besides turbo e30)

i used a goteze headgasket, meteric blues, and i looked over the head, it seemed true and not warped. i torqued them to 30ftlbs wait 5 min, 40, 50, and then 60.

i have 42lb injectors and @ 1bar of boost, the temp needle was alittle below vertical. i tuned it myself and i had it so that under boost a/f was right around high 12s verry low 13s. i have ngk BPR7ES plugs gaped to .023

its blowing under the intake plenum closest to the firewall in the middle of the last cylinder, is there something i overlooked or is this just going to keep happening?