Recent Topics
Chinese tires for your family's safety ...
by LoneRanger
11/23/14 08:17 AM
Snow Shoe Info Needed
by larryinnewyork
11/23/14 07:13 AM
Article on antifreeze and pet poisoning
by schuylkill
11/23/14 06:43 AM
Carlson Hardware
by greasegunn
11/23/14 05:57 AM
Dang! Snowblower Wasn't in 2WD for Years
by ronbo
11/23/14 05:56 AM
Nokian WRG3
by Patman
11/23/14 05:43 AM
Non linearity in mixing VIIs
by Shannow
11/23/14 03:23 AM
PPPP 5W20 Test Results ?
by ChrisD46
11/23/14 03:13 AM
Electric fence load
by mjoekingz28
11/23/14 01:46 AM
Would there be any negative effects?
by 268i
11/23/14 01:22 AM
How to kill a Leprechaun
by 285south
11/22/14 11:46 PM
This just made me laugh
by Shannow
11/22/14 11:19 PM
Newest Members
splatt, Lars65inc, dothedrew1202, dg370, Shuskey4
51982 Registered Users
Who's Online
75 registered (Bamaro, 97f150, 1foxracing, bama7x57, 808Soldier, 10 invisible), 1293 Guests and 208 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51982 Members
66 Forums
222514 Topics
3521645 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: 1672
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 300 118,100miles
2013 VW Passat TDI SE, 17,700miles
2014 VW Jetta TDI SportWagen 4450 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: 1439
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: 3999
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: 6935
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