Head gaskets didn't seal
#1656277
08/08/14 12:00 AM
08/08/14 12:00 AM
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Joined: Jan 2003
Posts: 1,194 Rochester, New York
GregY
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 1,194
Rochester, New York
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Guys,
My rebuilt, 60-over, 440 runs great except for the fact that passenger side head gasket (8519 PT) apparently didn't seal. I tore it apart tonight and it was leaking coolant into the No. 4 cylinder, but the gasket wasn't blown. The motor has Eddy aluminum heads and only 9:1 compression.
Before I took the heads off, I checked the torque on the bolts, I didn't get any movement at 70 foot lbs. However, when I undid the bolts, they seemed to undo at varying degrees of effort, and I wonder if that was problem.
Anyway, I am ordering new gaskets and am going to try again. Does anyone have any advice? I have successfully changed head gaskets before without any problems, I am not sure what went wrong.
Thanks.
Greg
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Re: Head gaskets didn't seal
[Re: GregY]
#1656278
08/08/14 12:03 AM
08/08/14 12:03 AM
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Joined: Jun 2006
Posts: 5,161 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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Maybe some were overtorqued, who assembled it? Did you check for overhang into the combustion chamber?
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Head gaskets didn't seal
[Re: Cab_Burge]
#1656281
08/08/14 12:18 AM
08/08/14 12:18 AM
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Joined: Jan 2003
Posts: 1,194 Rochester, New York
GregY
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OP
super stock
Joined: Jan 2003
Posts: 1,194
Rochester, New York
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The block was decked and the heads are brand new OOTB Eddy. I can double check those now that the motor is apart. I would hope the heads aren't cracked.
I guess I am not sure whether the surfaces are rough or smooth. The machine shop knew I was putting on aluminum heads.
Last edited by GregY; 08/08/14 12:19 AM.
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Re: Head gaskets didn't seal
[Re: GregY]
#1656284
08/08/14 12:37 AM
08/08/14 12:37 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Chase the block threads with a thread chaser tap & blow em out clean with the nozzle that goes all the way in to the bottom of blind holes. I dip bolt threads in 30wt eng oil then blow em off with shop air. As you know torque in multiple stages. Good visual inspection of the new gasket. yes check the head deck flatness. I'm assuming those Felpro's are Ok with alum heads, not sure but I've heard Cometics are a good choice for that app (iron block/alum heads) but wait for someone to elaborate further. EDIT Reuse (good thread visual tho)
Last edited by RapidRobert; 08/08/14 12:45 AM.
live every 24 hour block of time like it's your last day on earth
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Re: Head gaskets didn't seal
[Re: GregY]
#1656287
08/08/14 03:51 AM
08/08/14 03:51 AM
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Joined: Aug 2011
Posts: 1,083 SE PA
Yellow Fever
super stock
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super stock
Joined: Aug 2011
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SE PA
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Quote:
Would you guys reuse the head bolts? Or buy new ones?
ARP's? I always bought the recommended head bolts with any aluminum heads. Check for stretch and reuse if ok.
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Re: Head gaskets didn't seal
[Re: GregY]
#1656290
08/08/14 10:43 AM
08/08/14 10:43 AM
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Joined: Jan 2003
Posts: 21,065 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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Those are the cheaper gaskets.Try a set of FelPro Marine gaskets.I use them with Stealth heads and no problems.I used ARP bolts on mine.Just make sure to torque in 3 stages and use lube.Rocky
Chrysler Firepower
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Re: Head gaskets didn't seal
[Re: RUNCHARGER]
#1656291
08/08/14 11:20 AM
08/08/14 11:20 AM
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Joined: Jan 2003
Posts: 74,976 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
Head bolts bottomed out?
Sheldon
or the dowel pins ?
A friend .. RIP ... Had a similar issue , but it wasn't the head bolts bottoming , it was the threads in the block were screwed up and gave a FALSE torque reading , 2 sets of gaskets later ... 20 plus qts of oil and 2 trips to a big name hemi builder in Pa. that didn't do it right the first 2 times ... I told him it should have head studs instead of bolts on a race engine making 800 pls HP and Alum heads, switched to head studs and problem solved ...
I'm not suggesting that this build needs studs ...
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Re: Head gaskets didn't seal
[Re: JohnRR]
#1656292
08/08/14 11:40 AM
08/08/14 11:40 AM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
Quote:
Head bolts bottomed out?
Sheldon
or the dowel pins ?
Agreed...I've seen head gasket problems (blow outs) from having milled heads, and decked blocks an the assembler didn't dry fit (no gasket) the head to see if the dowels were too long....sometimes it's the simplest of things that cause major issues, always double check everything
mike
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Re: Head gaskets didn't seal
[Re: GregY]
#1656295
08/08/14 03:12 PM
08/08/14 03:12 PM
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Joined: Feb 2005
Posts: 4,311 Prospect, PA
BSB67
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master
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Prospect, PA
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Quote:
I used some FelPro 1009's once that apparently overhung and blew.
When exactly did this happen? Was it with these heads and after the machining?
How did you discover that water was getting into a cylinder?
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Re: Head gaskets didn't seal
[Re: BSB67]
#1656296
08/08/14 08:20 PM
08/08/14 08:20 PM
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Joined: Jan 2003
Posts: 1,194 Rochester, New York
GregY
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 1,194
Rochester, New York
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Quote:
Quote:
I used some FelPro 1009's once that apparently overhung and blew.
When exactly did this happen? Was it with these heads and after the machining?
How did you discover that water was getting into a cylinder?
No this was in the motors old days. All the stuff (heads/machine work) is new. Motor was broken in and dyno tested, the shop didn't report any problems. Started spewing coolant as soon as I got it installed (which was like a year after I got it back, I am a slow worker) and started it.
The water got in the oil too, not just the combustion chamber. Does that offer any clues as to what is happening?
Also, I am not going to buy new head bolts, I am going to check the bolt and dowel lenghts, and I am going to buy better gaskets, probably the recommended Edelbrock 7325.
Maybe I am already insane, and that is causing my car problems, not the other way around!
Thanks for all the help, it is really appreciated.
Greg
Last edited by GregY; 08/08/14 08:23 PM.
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