Take a look at my heads...
Take a look at my heads... My motor is about to be reasembled and I started getting worried about the "notch" on some heads. On a previous thread someone told me the 99s didn't have a notch. Look at these pics...
If you look you can see the a "notch" on the edge of them. I hope this is not the famous "notch" or I will have a problem. I bought the GM 6L MLS gaskets.
the head casting number if Im not mistaken is 853.
So am I gonna have a nasty surprise running this combo?
If you look you can see the a "notch" on the edge of them. I hope this is not the famous "notch" or I will have a problem. I bought the GM 6L MLS gaskets.
the head casting number if Im not mistaken is 853.
So am I gonna have a nasty surprise running this combo?
It stinks you already had them milled.... but you can get that notch TIG welded up, the heads milled and then you can run the cheaper gaskets. I know of a few people on here who have done this.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo ahaha, essentially that is what happened.... 
yea too bad they are already milled, now I gues I will run stock graphite gaskets until later on when I swap heads then I'll run the MLS...
yea too bad they are already milled, now I gues I will run stock graphite gaskets until later on when I swap heads then I'll run the MLS...
Originally Posted by Lostpatrolman
where is the notch, and why is it a problem?
This is why they are a problem.................
Its the weakest part of the head and block..... blew a headgasket and took a junk of both with it.
Kyle
if you can stand to loose another .007 off the heads you can still get it done for those.
sjh how much and where to get the mr gasket mls?
the cometic c5475 is what i am still using but they are expensive and hard as crap to find.
sjh how much and where to get the mr gasket mls?
the cometic c5475 is what i am still using but they are expensive and hard as crap to find.
well my reasoning is that with the current heads I won't regularly see more then maybe 650 rwhp on pump gas due to compression ratio, maybe closer to 600 rwhp. So I am just gonna run graphite stock gaskets till I swap to new heads.
TECH Regular
Joined: May 2003
Posts: 404
Likes: 0
From: Jacksonville, FL
Originally Posted by Tiago
My motor is about to be reasembled and I started getting worried about the "notch" on some heads. On a previous thread someone told me the 99s didn't have a notch.
But for the record, 99's definately have the notch. I had 99 heads.
TECH Enthusiast
Joined: Aug 2003
Posts: 596
Likes: 0
From: Downers Grove,IL
NA$TY-TA, I'm not so sure the notch had much effect in that damage. You have coolant passages closer to the chamber than the notch in both block and heads which are weaker areas. I have flame cut notches like that in both block and heads in other motors of mine. Just your typical poweradder damage when things go wrong. But that notch is a pretty stupid thing to have put on the head deck and certainly does no good of any kind.
MIGHTYMOUSE,
I got mine from Summit racing for 66$ each.They look just like cometics to me. I coated mine with hi temp aluminum paint also.
Here's a link- http://store.summitracing.com/defaul...umber&x=15&y=7
MIGHTYMOUSE,
I got mine from Summit racing for 66$ each.They look just like cometics to me. I coated mine with hi temp aluminum paint also.
Here's a link- http://store.summitracing.com/defaul...umber&x=15&y=7
wish ida seen that 5 days ago.. ah well..
im wondering how well the 6.0 gaskets and those 4.13's press onto stock cid's steel sleeve? i would think it would only be right on the outside edge... and that would not be as strong as the cometics wich are stock bore
im wondering how well the 6.0 gaskets and those 4.13's press onto stock cid's steel sleeve? i would think it would only be right on the outside edge... and that would not be as strong as the cometics wich are stock bore
TECH Enthusiast
Joined: Aug 2003
Posts: 596
Likes: 0
From: Downers Grove,IL
yes, 4.13 bore but that is a misprint on the thickness. They are stock .058" thick.
I'm using them on a 3.905" bore with my heads opened up to 73cc with a 4" chamber bore.
They are situated on the sleeve deck no problem.
I have had them to 15psi a few times and have had them on a full year now.
Steve
I'm using them on a 3.905" bore with my heads opened up to 73cc with a 4" chamber bore.
They are situated on the sleeve deck no problem.
I have had them to 15psi a few times and have had them on a full year now.
Steve