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Discussion Starter · #1 ·
I noticed a coolant drip around the heater box area on my GT, but I can't find the source by looking around the engine compartment. If the heater core develops a does the coolant drain to the outside of the car or would it leak to the inside.

Thanks
 

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OPEL-LESS!!!
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the heaterbox in the GT has a tube made into the car that will drain the coolant to the outside of the car, its really hard to see with the engine and everything in place. sometimes when the heaterbox starts to rot out it will leak into the inside ot the car though. bypass the heatercore for a day or two and see if it still leaks, that'd be a surefire way to see if its the heatercore or not.
 

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If you're not convinced that it is collant that you have then......
I noticed that my pass floor board was getting wet in the rain, and I was getting blasted with sand the day after a rain. (I live on a dirt road.)
I foud two things. one there is a place in the pass wheel well top rear the is a shelf. mine had rusted through, so the mud would get flung up above the shelf then dry and fall into the fan. this would then sand balst me clean when I started the fan.
I also found that the edge of the engine compartment where the rubber stop sits to hold the hood had rusted alittle hole to the fan compartment. I stoped that up with some silcone. and fiberglassed the shelf in the wheel well.
 

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BTW: if it is a coolant leak, then try putting a couple of egg whites in the radiator. I've fixed a few leeks this way.


I once had a leak in a ford ranger that was a steady stream out the back of the engine. I put in two egg whites, and drove it for two or three years. never found out where it was leaking though.

This was actually just recently on "Myth Busters" they proved it works fine.
 

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Coolant leak fix

Hey marcus
Can you take some pics of your fix...sounds like a great tech tip
 

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boomerang opeler
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if your heater matrix has a leak you would normal get steam in the cab as it comes out under pressure and is very hot
what colour is this drip if its clear its rain water /splashes
if its the same colour as the stuff in the rad filler top then you are right and its a matrix gone bad
a coolant sealer will get a small leak (eggs are for emergency use as they block things like the thermostat with a huge chunk of poached egg)
best bet if it is a leak is to get the matrix soldered where it is bust
 

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I've got a small leak/seep in my head gasket.....I've been trying to decide which sealant to try.....but I guess it shouldn't be the poached egg method.
 

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Heater Core leak

If the heater core is leaking you will find coolant on the floor board of the passenger side. The Core is not located in the area of the drain tube, the drain tube is for water that can come in through the cowl from where the fan get its air. The heater core is just out side this area. To replace it, sorry, you have to pull the dash to remove the heater then remove the core from the heater. You can try pepperica about two table spoons into your radiator and and bring the water temp up to normal, this should stop up the hole at the leak if it is not to large, pin hole size no problem, 1/8" won't work. I have used this in the past with a lot of success as I have driven a FORD for many many years and not all where First On Race Day. Also Opels since '72.
rk
 

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Actually there is a drain in the floor of the heater box. It allows coolant to go into the engine compartment and drain on the ground. The hole for the drain is outboard, and below the heater hose connections. The pics shows the drain tube in the floor of the heater box and the oval hole is where the heater hoses come in from the engine compartment. The other pic shows the holes in the engine compartment, large hole is for the heater hoses, the drain is below that, HTH.
 

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PrOpeller
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Killer Texas GT said:
You can try pepperica about two table spoons into your radiator and and bring the water temp up to normal, this should stop up the hole at the leak if it is not to large, pin hole size no problem...
I've found that adding a few sauteed onions can be delicious too. :D

Sorry, I couldn't resist...a pinch of paprika, two egg whites, bring to a boil... starting to sound like a cooking show! lol
 

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boomerang opeler
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PROPEL said:
I've found that adding a few sauteed onions can be delicious too. :D

Sorry, I couldn't resist...a pinch of paprika, two egg whites, bring to a boil... starting to sound like a cooking show! lol
it must be an opel Goulash Terriaki :D

always wonderd what that ment
 

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Heater core location

If your heater core is leaking the coolant will be found on the interior of the car (i.e. passenger floor). As stated in my previous post on this subject: the drain is for water coming in at the cowl only, as the heater core is located on the interior side of the passenger compartment. You can by pass the heater core for a week or so till it rains to verify that it is or is not the heater core leaking. Or pressureize you cooling system and check that way. However if it is the heater core leaking you will have to remove the dash then the heater to change it out. I will post pictures tonight, but have to start the comute to work. Not intended to sound like I'm on a soap box, but that is the way the GT is put together.
rk
 

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73Manta72Gt, If you need a core, give me a holler, I have a few spares. Jarrell
 

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here is a picture of the fix to the shelf. picture is looking into the wheel well on the pass side and looking back along car.
 

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Discussion Starter · #17 ·
Thanks for all the info. it only drips green when it's really cold after the engine come up to temperature it stops. I'm going to try some stop-leak and see how that works.
 
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