Recent Topics
79 ford ltd rear main
by sasha
55 minutes 22 seconds ago
Mobil 1 HM or Maxlife full synthetic?
by oilmaven
Today at 04:56 AM
Mobil 5000 5w30 Or Super Tech 5w30
by crazyoildude
Today at 01:59 AM
5/32 enough for Winter?
by SumpChump
Yesterday at 11:52 PM
Noise from front wheel area
by weebl
Yesterday at 11:31 PM
Need advice.
by joyridin83
Yesterday at 11:06 PM
Amsoil SVG or Valvoline synpower 75w90
by donnyj08
Yesterday at 10:54 PM
Kia oil control valve
by Propflux01
Yesterday at 10:16 PM
Avalanche power steering cooler
by spasm3
Yesterday at 09:58 PM
Sharp 42" LED 1080p/120Hz - $299
by mrsilv04
Yesterday at 09:50 PM
brake squeak left turn.
by wrcsixeight
Yesterday at 09:40 PM
Sgt. Tamoressi released
by FL_Rob
Yesterday at 09:09 PM
Newest Members
joyridin83, NH73, Blkflg, steam_soldier, Ben_SC
51763 Registered Users
Who's Online
47 registered (Accent, 05LGTLtd, ArtDart, ccdhowell, 3800Series, 330indy, 4 invisible), 656 Guests and 170 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51763 Members
64 Forums
221501 Topics
3502798 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Topic Options
#2460689 - 12/12/11 06:04 PM Coolant leak, Intake or head gasket? (350 Chevy)
Rumble Offline


Registered: 03/25/09
Posts: 141
Loc: Eastern U.S.
My '92 Chevy engine (C-1500 truck) is leaking antifreeze near the intake manifold. This is on the left-hand side where the intake manifold bolts to the head (there's coolant on the manifold). Would this be a bad intake manifold gasket, or head gasket? I'm guessing it's just the manifold gasket. Your thoughts?
_________________________
'79 Cadillac Coupe de Ville 15K, Delo 15w-40
'92 Chevrolet C1500 "Sport" 142K, Delo 15w-40
'04 Chrysler PT Cruiser 91K, Exxon Super5000 10w-30

Top
#2460693 - 12/12/11 06:07 PM Re: Coolant leak, Intake or head gasket? (350 Chevy) [Re: Rumble]
Boomer Offline


Registered: 09/19/08
Posts: 1657
Loc: Pennsylvania
Also check the thermostat housing gasket. They can leak on these engines and cause a pooling around the intake manifold.
_________________________
2003 Saturn L 300 117,200 miles
2013 VW Passat TDI SE, 16,700miles
2014 VW Jetta TDI SportWagen 3350 miles

Top
#2460731 - 12/12/11 06:56 PM Re: Coolant leak, Intake or head gasket? (350 Chevy) [Re: Rumble]
FL_Rob Offline


Registered: 06/03/09
Posts: 1423
Loc: gulf coast FL.U.S.
Intake....If you don't want to invest alot in the engine,try bar's leak copper .Not silver .Not pellets .Copper ..Head and manifold sealer .Or tear it down and replace the Intake to head(LIM) gasket.BTW..Look for corroded fittings that may be leaking while you're there.Hope this helps.
P.S...Don't forget about the heater hose fittings,one left me scratching my head awhile.The Wye on the, or near the heater bypass.


Edited by FL_Rob (12/12/11 07:03 PM)

Top
#2460750 - 12/12/11 07:38 PM Re: Coolant leak, Intake or head gasket? (350 Chevy) [Re: Rumble]
cchase Offline


Registered: 11/03/09
Posts: 3998
Loc: New England
Intake manifold gasket. The spot you mention is where they leak on these trucks. Very common. Also very easy (and cheap) to replace. Don't skimp out, spend the afternoon and just do it in the garage. There's nothing complicated about replacing it.

Top
#2460783 - 12/12/11 08:07 PM Re: Coolant leak, Intake or head gasket? (350 Chevy) [Re: Rumble]
Rumble Offline


Registered: 03/25/09
Posts: 141
Loc: Eastern U.S.
Thanks everyone. Thought I was done with repairs for the year, lol. Never done one before, but I think I can handle it.
_________________________
'79 Cadillac Coupe de Ville 15K, Delo 15w-40
'92 Chevrolet C1500 "Sport" 142K, Delo 15w-40
'04 Chrysler PT Cruiser 91K, Exxon Super5000 10w-30

Top
#2460806 - 12/12/11 08:19 PM Re: Coolant leak, Intake or head gasket? (350 Chevy) [Re: Rumble]
Knox Offline


Registered: 05/16/11
Posts: 263
Loc: Kansas, USA
More then likely intake manifold. A bad head gasket is very unlikely to cause a leak there. Like cchase, mentioned, it's an afternoon job.

I'd double check my oil, to see if there is any antifreeze in it. I'm assuming your going to change the oil after the intake manifold gasket, so just keep an eye on it for the next few days.

Some intake manifold kits include a gasket for the lifter valley and some just include a tube of sealant. Just use the sealant, the gasket tend to slide out or move. If your set on using the lifter valley gaskets, may want to either rough up the surfaces a bit with some course steel wool or use a punch to put some "dimples" on the block and intake surfaces.
_________________________
2009 Subaru Legacy (Special Edition)
Delo XLE 10w-30 and Napa Gold 7712

Top
#2461114 - 12/13/11 08:17 AM Re: Coolant leak, Intake or head gasket? (350 Chevy) [Re: Rumble]
artificialist Offline


Registered: 09/23/07
Posts: 6904
Loc: Florida
Determine that the head gasket is not leaking by using a block tester like this:
http://www.lislecorp.com/divisions/products/?product=406

It is still fresh on my mind when I fixed the intake gaskets on a GM 3.1 V6, AND THEN the HG leaked.

I don't encounter many Chevy TBI engines anymore, so I don't know if there exists a "Fel-Pro Problem Solver" gasket, but if one exists, buy it. It will outlast an OE gasket.
_________________________
2010 Lancer Ralliart Sportback

Top