Water seeping on new head gasket -not fired yet
09-28-2010, 12:54 PM
#1
Water seeping on new head gasket -not fired yet I rebuilt my engine (5.7 LS1) and am certain the deck was perfect and the head was perfect. I used new GM MLS gaskets with a light coat of copper spray. I havnt fired the engine up yet cause im still putting the car back together.
I noticed one of the headgaskets in the middle by the exhaust ports will drip a tiny drip once every half hour. Its so tiny its weird.
Will this seal once the engine is ran and heated up? id think a complete aluminum engine would have quite a bit of thermal expansion to it.
Anyone else ever see this?
I noticed one of the headgaskets in the middle by the exhaust ports will drip a tiny drip once every half hour. Its so tiny its weird.
Will this seal once the engine is ran and heated up? id think a complete aluminum engine would have quite a bit of thermal expansion to it.
Anyone else ever see this?
09-28-2010, 01:44 PM
#2
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I'm having the exact same problem. Just got it all together last night, tried to start it, but left a ground wire off so it didn't fire, thank god. So as I was looking for that ground wire, I noticed a small drip of anitfreeze in the middle of the driver's side head. New heads, new gaskets, followed torque specs to a T, wtf??
Only differnce for me is I'm using a 6.0 block with 853 heads. Any help would be great, if I figure it out, I'll let you know....
Only differnce for me is I'm using a 6.0 block with 853 heads. Any help would be great, if I figure it out, I'll let you know....
09-28-2010, 02:23 PM
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I'm having the exact same problem. Just got it all together last night, tried to start it, but left a ground wire off so it didn't fire, thank god. So as I was looking for that ground wire, I noticed a small drip of anitfreeze in the middle of the driver's side head. New heads, new gaskets, followed torque specs to a T, wtf??
Only differnce for me is I'm using a 6.0 block with 853 heads. Any help would be great, if I figure it out, I'll let you know....
Only differnce for me is I'm using a 6.0 block with 853 heads. Any help would be great, if I figure it out, I'll let you know....
09-28-2010, 02:28 PM
#4
Mine are (i forgot what casting) stock 99 vette ones. And I did see the notch in the head, and thats where its seeping from. WTF?? These were supposed to be for this application. Im going to be pissed if thats the reason. Im going to fire it up and see probably. Its such a small drip it could seal itself.... I hope.
Autoparts stores dont even list the graphite ones anymore. I got mine from Summit when I ordered all my other parts. But I checked local stores and all they offered were the MLS. I wanted the other ones. grrrrrr.
Autoparts stores dont even list the graphite ones anymore. I got mine from Summit when I ordered all my other parts. But I checked local stores and all they offered were the MLS. I wanted the other ones. grrrrrr.
09-28-2010, 02:32 PM
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Mine are (i forgot what casting) stock 99 vette ones. And I did see the notch in the head, and thats where its seeping from. WTF?? These were supposed to be for this application. Im going to be pissed if thats the reason. Im going to fire it up and see probably. Its such a small drip it could seal itself.... I hope.
Autoparts stores dont even list the graphite ones anymore. I got mine from Summit when I ordered all my other parts. But I checked local stores and all they offered were the MLS. I wanted the other ones. grrrrrr.
Autoparts stores dont even list the graphite ones anymore. I got mine from Summit when I ordered all my other parts. But I checked local stores and all they offered were the MLS. I wanted the other ones. grrrrrr.
09-28-2010, 10:30 PM
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There is a small notch (i believe used to help remove the heads) on the older blocks that does not allow the use of the newer MLS GM head gaskets. The rubber seals on the MLS gasket do not seal this notch correctly and it causes water to seep through.
You need graphite head gaskets son. Been there.
You need graphite head gaskets son. Been there.
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09-29-2010, 08:44 AM
#8
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He's definately right. Took my car apart again yesterday. Nothing wrong with anything except that stupid notch. Made a trip to summit and bought the right ones this time. Hopefully I'll have it all back together today and see if that fixes it. I'm sure it will.
You could just buy different heads if you really want to use the metal gaskets. Out of my price range at the moment. Small fortune just on sensors for this thing.
You could just buy different heads if you really want to use the metal gaskets. Out of my price range at the moment. Small fortune just on sensors for this thing.
09-29-2010, 10:09 AM
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He's definately right. Took my car apart again yesterday. Nothing wrong with anything except that stupid notch. Made a trip to summit and bought the right ones this time. Hopefully I'll have it all back together today and see if that fixes it. I'm sure it will.
You could just buy different heads if you really want to use the metal gaskets. Out of my price range at the moment. Small fortune just on sensors for this thing.
You could just buy different heads if you really want to use the metal gaskets. Out of my price range at the moment. Small fortune just on sensors for this thing.
