Major brain food for the (Blown Head Gasketeers)

[ians13]

yea am starting my HG job this week end i was warned.
it was going to blow and so i did

 

[s383mmber1]

brent, did you get the BLOCK machined?

Its all in the tune gentlemen!

 

[MK3Brent]

I beat the block flat with a lapping tool... that's how it works right?

 

[87nasupra]

Where did you get the lapping tool at, and how much was it ?

 

[MK3Brent]

rriemer@cadvision.com

They're not cheap, best bet is to find someone with one and borrow/rent it.

 

[87nasupra]

rriemer@cadvision.com

They're not cheap, best bet is to find someone with one and borrow/rent it.

That sucks, they shop i take my engine parts to says they will charge me 260 an hr to do it. Thats a damn rip off

 

[starscream5000]

I want a DR. Pepper .

 

[Clip]

how does the machining/decking process go? retard question, but i figure SM is the best place to ask

 

[TurboWarrior]

So does that mean that those of with stock headgaskets could just retorque them, in theory?

I wouldn't do that unless it was done recently

 

[GotToyota?]

Sign me up for a Dr. Pepper!

 

[jdub]

The key to any HG replacement (MHG or composite) is proper block/head deck prep, torque to ARP spec (or 70-75 ft/lbs on Toyota bolts), and a GOOD tune.

I personally wouldn't go over 14-16 psi of boost on a composite gasket, but a lot of guys have. That's because they took the time/effort for a GOOD tune.

IMO...do the above and the composite HG will work quite well

 

[Boost Lee]

320rwhp/360rwtq on a new stocker retorqued 76 lb.ft's w/ a 60-1 here.

 

[tissimo]

my stock hg w/ arp bolts lasted a year of me beating the piss out of it.. it would of held if a injector didn't fail and fill the cyl w/ gas killing the gasket..

 

[TurboWarrior]

ive had bad luck with stock HGs. My first car blew at 9psi as soon as i turned up boost. My car now held at 10psi. turned up to 11.5 it blew

 

[rumptis]

minus a few because of the dumbasses who created another accout since they didn't like thier name....

Boost Lee??? LOL

Rep to you man!

 

[Aaron J Williams]

I beat the block flat with a lapping tool... that's how it works right?

Can you post pics of the lapping tool so I can fab one for my upcoming rebuild?

 

[Shytheed Dumas]

minus a few because of the dumbasses who created another accout since they didn't like thier name....

I kept my account. Just ask a mod for help...

 

[Boost Lee]

I kept my account, too, assholes. :icon_conf

I just...wanted two...1 for backup...you know, incase...

You know.

Safety?

:x:

 

[Adjuster]

Ok, so I too ran around on the stock head gasket, re-tourqed to 72lbs, and it was holding 20psi fine... then some detonation on a cold morning, and it was gone. (And of course, that had to be on the trip to Vegas... )

So, some detonation now on the metal one, and it's not gone. Cheap insurance IMHO all things being equal, the metal gaskets v/s the composite types will hold up much longer to abuse, intentional or accidental than the stock type any day of the week.

(Case in point, about 28psi on pump 91... detonation that killed two spark plugs, but did not blow the head gasket. If I had lifted, I would have joined the bugs splattered all over a semi truck's front end. so lifting while it was detonating was not an option...)

 

[MK3Brent]

I completely agree with the functionality of a MHG over the composite.

However I'm currently just having a good ol' time with a OEM gasket and my new found HP. No sense in fixing something that isn't broken yet.



**cough** yet..