bad head gasket??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ellisjay2 · 07-07-2014, 02:24 AM

Will a bad head gasket cause oil seeping on side of block???? I don't know how to post pictures yet.

geezer#99 · 07-07-2014, 09:22 AM

No it won't!!

**truckdude239** · 07-07-2014, 07:16 PM

Nope

**bigmac73** · 07-09-2014, 10:49 AM

probably bad valve cover gasket

GASoline71 · 07-09-2014, 10:54 AM

Agree with the valve cover gasket.

Gary

cg285 · 07-09-2014, 11:34 AM

Quote:

Originally Posted by ellisjay2

Will a bad head gasket cause oil seeping on side of block???? I don't know how to post pictures yet.

it has happened. about 40 yrs ago i had a warranty oil leak and ultimately found that the head gasket was sabotaged, at the gm factory, with a note in the lifter galley that said something like - how long did it take you bastards to find this -
there were other similar things back in the day (whiskey bottle in the door panel tied in with a string for one)

but to answer your question - not normally

**truckster** · 07-09-2014, 12:35 PM

Quote:

Originally Posted by cg285

it has happened. about 40 yrs ago i had a warranty oil leak and ultimately found that the head gasket was sabotaged, at the gm factory, with a note in the lifter galley that said something like - how long did it take you bastards to find this -
there were other similar things back in the day (whiskey bottle in the door panel tied in with a string for one)

I worked at a Chevrolet dealership back in the 70s. We got in a Camaro with a weird rattle in the door. When I took the panel off, I fished out a whiskey bottle. I think it probably wasn't too uncommon.

But I'd look at the valve cover gasket (which makes your life a whole lot easier, by the way). And when I replace valve cover gaskets, I like to use Super Weatherstrip Adhesive (black) to make sure I have a good seal. I've never had one leak that I've used it on.

cg285 · 07-09-2014, 01:17 PM

Being rude or giving people a hard time wont be tolerated.

**truckster** · 07-09-2014, 03:10 PM

We're here because we don't mind helping other truck owners and answering questions. If the question bothers you, just ignore it.

But, yes, cleaning up the engine would be a good idea.

cg285 · 07-09-2014, 03:21 PM

Be nice or don't respond

GASoline71 · 07-09-2014, 05:10 PM

Wow... "Lighten up Francis..." ~ Sgt. Hulka

90% of all oil leaks coming from the top of the engine come from 2 areas. Valve cover gaskets, and intake manifold sealing. Not "poke and hope" at all but a good place to start.

Gary

**truckster** · 07-09-2014, 09:35 PM

Oil leaking on the side of the block on a SBC is almost always a valve cover gasket.

And there are nice ways to say things and not-so-nice ways to say things.

cableguy0 · 07-09-2014, 10:06 PM

The Original poster had a legitimate question. There is no reason for rude responses. It wont be tolerated. Everyone is here to help and the guy needed help.

99% of the time if a small block has oil down the side of the block its the valve cover gaskets leaking.

**bigmac73** · 07-10-2014, 09:10 AM

Quote:

Originally Posted by cg285

Being rude or giving people a hard time wont be tolerated.

Forgive me but i am totally lost , who was being rude???? i do not see the post..

**truckster** · 07-10-2014, 10:24 AM

Quote:

Originally Posted by bigmac73

Forgive me but i am totally lost , who was being rude???? i do not see the post..

That's because it was modified by Cableguy.

One of the things I love about this forum is that you don't have to be afraid of the reactions of other members, because the moderators keep it civil. I belonged to another forum where the "smarter" member were constantly flaming the guys who asked "dumb" questions.

And no, the OP's question wasn't a dumb question.

Marv D · 07-10-2014, 11:27 AM

There is no pressurized oil above the cam except what is pumped up the pushrods to theback side of the rockers. No pressurized oil comes through the head gaskets,, NONE!!! ONLY drainback oil flowing through the pushrod pinch and beside,, and the two drainback holes angled towards the lifter galley at each end of the head. WATER passes through the head gasket, and it keeps cylinder pressure captured in the chamber.

The ONLY oil that could come past a head gasket would be at the top corner where the block, head and intake all meet.

So that leaves rocker cover gaskets like suggested if you have oil on the outside of the heads or block.

crazy longhorn · 07-11-2014, 11:08 AM

Don't you LS boys ,just love the motor....pop a valve cover off a 100,000 mile motor, wipe it off, & bolt it back on (no leakey)! I could not ever say that about the gen I engine? Back of the intake is also a good source for a leak...I had one that a swore was a rear main seal leak? It dripped out of the bellhousing, when I stopped for fuel? A little further checking, showed that it had squirted the rear intake seal out....only RTV, on the front & rear of the intake

Longhorn

07-07-2014, 02:24 AM	#1
ellisjay2 Registered User Join Date: Feb 2014 Location: marietta ga Posts: 147	bad head gasket??? Will a bad head gasket cause oil seeping on side of block???? I don't know how to post pictures yet.

07-07-2014, 09:22 AM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,531	Re: bad head gasket??? No it won't!!

07-07-2014, 07:16 PM	#3
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,228	Re: bad head gasket??? Nope __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

07-09-2014, 10:49 AM	#4
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: bad head gasket??? probably bad valve cover gasket __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

07-09-2014, 01:17 PM	#8
cg285 Registered User Join Date: Aug 2013 Location: sumterville, florida Posts: 914	Re: bad head gasket??? Being rude or giving people a hard time wont be tolerated. Last edited by cableguy0; 07-09-2014 at 10:03 PM.

07-09-2014, 03:10 PM	#9
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,843	Re: bad head gasket??? We're here because we don't mind helping other truck owners and answering questions. If the question bothers you, just ignore it. But, yes, cleaning up the engine would be a good idea.

07-09-2014, 03:21 PM	#10
cg285 Registered User Join Date: Aug 2013 Location: sumterville, florida Posts: 914	Re: bad head gasket??? Be nice or don't respond Last edited by cableguy0; 07-09-2014 at 10:02 PM. Reason: Rude

07-09-2014, 09:35 PM	#12
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,843	Re: bad head gasket??? Oil leaking on the side of the block on a SBC is almost always a valve cover gasket. And there are nice ways to say things and not-so-nice ways to say things. Last edited by cableguy0; 07-09-2014 at 10:02 PM.

07-09-2014, 10:06 PM	#13
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: bad head gasket??? The Original poster had a legitimate question. There is no reason for rude responses. It wont be tolerated. Everyone is here to help and the guy needed help. 99% of the time if a small block has oil down the side of the block its the valve cover gaskets leaking. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

07-10-2014, 11:27 AM	#16
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: bad head gasket??? There is no pressurized oil above the cam except what is pumped up the pushrods to theback side of the rockers. No pressurized oil comes through the head gaskets,, NONE!!! ONLY drainback oil flowing through the pushrod pinch and beside,, and the two drainback holes angled towards the lifter galley at each end of the head. WATER passes through the head gasket, and it keeps cylinder pressure captured in the chamber. The ONLY oil that could come past a head gasket would be at the top corner where the block, head and intake all meet. So that leaves rocker cover gaskets like suggested if you have oil on the outside of the heads or block. __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.

07-11-2014, 11:08 AM	#17
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Re: bad head gasket??? Don't you LS boys ,just love the motor....pop a valve cover off a 100,000 mile motor, wipe it off, & bolt it back on (no leakey)! I could not ever say that about the gen I engine? Back of the intake is also a good source for a leak...I had one that a swore was a rear main seal leak? It dripped out of the bellhousing, when I stopped for fuel? A little further checking, showed that it had squirted the rear intake seal out....only RTV, on the front & rear of the intake Longhorn __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....



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