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Joined: Jan 2009
Posts: 584
Oil Can Mechanic
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OP
Oil Can Mechanic
Joined: Jan 2009
Posts: 584 |
I have my head bolted back down. Everything seems to be fine, however I seem to have some leakage at the back of the engine. This existed previously. I have cleaned the area the best I am able and ruled out the fitting for the sending unit (heater attachment fitting). It is VERY tight and hard to feel or see, but I feel as though it's not coming from the back of the block or engine where the head and block meet.
It feels like there is a plug back there that feels like a freeze plug. I suppose I'm wrong, but I thought I had heard you guys say that coolant does not enter the block on these engines, and if that is true, then there wouldn't be a freeze plug.
Perhaps the coolant is coming from the very dead center of the back of the engine, where my fingers or a view from a mirror cannot reach, and running down to the circular object.
Ideas ??
Youth is wasted on the young
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Joined: Feb 2006
Posts: 2,262 Likes: 6
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Feb 2006
Posts: 2,262 Likes: 6 |
There is definitely a freeze plug back there, and with the engine installed it's less than 1/2" from the firewall -- very difficult to get to without pulling the engine. The freeze plug is in the block, about 1/2" below the head gasket and on the center line. If it's leaking, the easiest fix is to pull the engine. While you have it out, it would be a great idea to replace both that freeze plug and the one in the left side of the block below the exhaust manifold -- they are identical. For both, use the opportunity to clean out all the rust and scale which inevitably builds up back there -- the car will run much cooler.
Coolant definitely DOES flow through the upper parts of the block on these engines, and they do tend to plug up with rust and debris, especially in the area around cylinders 5&6.
All the Best, Chip
Last edited by Chip; 11/18/16 08:39 PM. Reason: Typo
"It's wise to choose a SIX"
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Joined: Aug 2006
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ChatMaster - 1,500
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ChatMaster - 1,500
Joined: Aug 2006
Posts: 1,774 Likes: 4 |
There is definitely a freeze plug back there, and with the engine installed it's less than 1/2" from the firewall -- very difficult to get to without pulling the engine. The freeze plug is in the block, about 1/2" below the head gasket and on the center line. If it's leaking, the easiest fix is to pull the engine. While you have it out, it would be a great idea to replace both that freeze plug and the one in the left side of the block below the exhaust manifold -- they are identical. For both, use the opportunity to clean out all the rust and scale which inevitably builds up back there -- the car will run much cooler.
Coolant definitely DOES flow through the upper parts of the block on these engines, and they do tend to plug up with rust and debris, especially in the area around cylinders 5&6.
All the Best, Chip 
Ed
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Joined: Jan 2009
Posts: 584
Oil Can Mechanic
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OP
Oil Can Mechanic
Joined: Jan 2009
Posts: 584 |
Nuts....................................................................
thanks for the info.... I think. If I were to be the kinda guy that used emoticons, I'd be doing that really frustrated one right now.
Youth is wasted on the young
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Joined: Apr 2010
Posts: 734 Likes: 14
Oil Can Mechanic
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Oil Can Mechanic
Joined: Apr 2010
Posts: 734 Likes: 14 |
Hello Vetteman61,
Just to be sure exactly where the coolant is leaking from, was there a leak before you removed the head? If no, why all of a sudden now? Try drying the area with towels and then slide cardboard in measured increments down the suspected location of the leak. If the cardboard becomes stained, you should know at what height the coolant is leaking. Head gasket level, heater fitting level, freeze plug level. Worth a try.
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