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1988 iroc loosing coolant

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Old Jun 17, 2013 | 10:29 AM
  #1  
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From: north carolina
Car: 1988 iroc-z
Engine: 5.7 tpi
Transmission: 700 r4
Axle/Gears: 3.27
1988 iroc loosing coolant

My camaro is loosing coolant,new hoses,cap and pump have been installed.Has no external leaks or heater core leakage,no water in oil,engine runs great.I guess it may be going out the exhaust,any ideas or experience with this problem?
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Old Jun 17, 2013 | 08:51 PM
  #2  
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Car: 1991 camaro rs
Engine: 3.1 - looking to upgrade to 3400 hy
Transmission: 700r4
Axle/Gears: Stock? Lol
Way to post this in more than one thread.


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Old Jun 17, 2013 | 10:32 PM
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From: Salt Lake
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: 1988 iroc loosing coolant

If there is no external leaking (you need to be sure) and your oil isn't coming out milkshake, coolant is leaking into the cylinders and out the exhaust during engine operation. (head gasket time) If it's a noticeable amount, you should be able to smell it in your exhaust.
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Old Jun 18, 2013 | 04:41 AM
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From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: 1988 iroc loosing coolant

Also if you put your fingers under your exhaust, they'll come back wet...it'll be noticeable.
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Old Jun 18, 2013 | 06:04 AM
  #5  
88zroc's Avatar
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From: north carolina
Car: 1988 iroc-z
Engine: 5.7 tpi
Transmission: 700 r4
Axle/Gears: 3.27
Re: 1988 iroc loosing coolant

Originally Posted by Keoman
If there is no external leaking (you need to be sure) and your oil isn't coming out milkshake, coolant is leaking into the cylinders and out the exhaust during engine operation. (head gasket time) If it's a noticeable amount, you should be able to smell it in your exhaust.
Maybe,but it could also be the intake gasket leaking.The results would be the same,water in the cylinders,just wish I knew a way to tell which.
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Old Jun 18, 2013 | 11:17 AM
  #6  
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From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: 1988 iroc loosing coolant

Originally Posted by 88zroc
Maybe,but it could also be the intake gasket leaking.The results would be the same,water in the cylinders,just wish I knew a way to tell which.
Do a compression test of the cylinders.
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Old Jun 18, 2013 | 11:58 AM
  #7  
rwstegne's Avatar
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From: Raleigh
Car: 1989 Iroc Z 5.7L
Engine: 5.7L
Transmission: T56
Axle/Gears: built 4.10s
Re: 1988 iroc loosing coolant

I had the same problem with my 89 TPI. I just went to autozone and used their block tester which is straight forward chemistry experiment and it confirmed that I had a leaking headgasket. So hopefully I will have it on the road again before the 4th.

Last edited by rwstegne; Jun 20, 2013 at 01:52 PM.
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Old Jun 21, 2013 | 04:51 PM
  #8  
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From: Salt Lake
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: 1988 iroc loosing coolant

The way I see it, IM or head gaskets, you still have remove the same parts.
Go to autozone and buy head gaskets and an IM gasket set
Tear the intake down.
Found the leak! Yey! Fix it and return the head gaskets.
If not, keep going...

No need confusing yourself with all the "testing" to figure out what you already know. In the end, you have an internal coolant leak.
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Old Jun 21, 2013 | 08:42 PM
  #9  
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From: Raleigh
Car: 1989 Iroc Z 5.7L
Engine: 5.7L
Transmission: T56
Axle/Gears: built 4.10s
Re: 1988 iroc loosing coolant

Well, in my case both the intake and one of the head gaskets were leaking. The thought process was to verify the head gasket first prior to fixing the obvious intake leak, but I am not mechanic.
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