Cracked Head? 440
#2595991
12/23/18 10:14 PM
12/23/18 10:14 PM
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Joined: Jul 2011
Posts: 960 Chicago
PurpleBeeper
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 960
Chicago
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So, I've got the valve covers off (440) & just adjusted the valve lash. I notice that there is some coolant "weeping" out of the rear/lower valve cover bolt hole on the passenger side. Is that a cracked head?
I'm "hoping" those threads just run really, really close to the head cooling jacket & I tapped too deep cleaning up the threads.....but I'm just "hoping".
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: Cracked Head? 440
[Re: PurpleBeeper]
#2596030
12/23/18 11:30 PM
12/23/18 11:30 PM
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Joined: Jan 2003
Posts: 1,791 Big Sky Country
MO_PA
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,791
Big Sky Country
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If I'm not mistaken the lower end holes go into the water jacket that's why Ma Mopar put studs in the holes
Last edited by MO_PA; 12/23/18 11:31 PM.
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Re: Cracked Head? 440
[Re: PurpleBeeper]
#2596041
12/23/18 11:44 PM
12/23/18 11:44 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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It's not unknown for valve cover boltholes to hit water. Not supposed to but stuff happens.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Cracked Head? 440
[Re: PurpleBeeper]
#2596141
12/24/18 02:59 AM
12/24/18 02:59 AM
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Joined: Aug 2003
Posts: 43,257 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,257
Bend,OR USA
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Last edited by Cab_Burge; 12/24/18 02:59 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Cracked Head? 440
[Re: PurpleBeeper]
#2596268
12/24/18 01:40 PM
12/24/18 01:40 PM
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Joined: Jul 2011
Posts: 960 Chicago
PurpleBeeper
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 960
Chicago
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Thanks everyone. I could not see any visible cracks & the engine has been running strong. I put some RTV silicone in that hole before screwing in the valve cover bolt....we'll see. No sign of antifreeze in the oil.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: Cracked Head? 440
[Re: PurpleBeeper]
#2600984
01/03/19 03:26 PM
01/03/19 03:26 PM
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Joined: Jan 2003
Posts: 13,380 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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I had a 906 head that one of the bottom corner valve cover bolts went into a water jacket. A little sealer on that bolt and no problems.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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