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  #1  
Old 05-09-2010, 01:58 PM
02QuadCabSLT 02QuadCabSLT is offline
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Default 4.7 Loosing Coolant out the Tailpipe

My 02, 4.7 with 114K started to push coolant vapor when it is started from cold or when it sits for 30 minutes or so between runs. Problem (steam) is not visible when engine is hot but I still smell coolant in exhaust. Oil not contaminated, Coolant not contaminated. Never overheated or run out of oil. Anyone try to retorque the heads as a fix. Since it "goes away" when hot I get the impression that the leak is quite small. I am leaning toward head gasket as the final cure and wondering if anyone has had the pleasure of taking this on themselves or is the consensus to send it out to a professional. Did some research on line and get the impresson that the work can be quite complicated.
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Old 05-09-2010, 02:15 PM
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Are you going through coolant ? Has anybody performed a cooling system pressure test or CO2 test .
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Old 05-09-2010, 03:28 PM
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The 3 timing chains can be daunting to a first timer who doesn't have the proper tools to tackle the job. I suppose you could technically retorque the head bolts but bear in mind they're torque to yield bolts, so you'll need an angle meter.
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Old 05-09-2010, 04:39 PM
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And by retorqing , your only putting a bandaid on it for awhile .
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Old 05-09-2010, 05:32 PM
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Originally Posted by Toms Blue Ram 1500 View Post
And by retorqing , your only putting a bandaid on it for awhile .
IF it even works. Getting a proper diagnosis would be the smart thing to do.
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Old 05-09-2010, 08:03 PM
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or...you can put some of that stuff they were blowing the cash for clunkers cars up with in the coolant, and it'll seal the headgasket long enough for you to sell it
Little trick I learned from a used car salesman aquaintance...lol

But...do a compression check on each cylinder...that'll tell you if its the head gasket or not. But, honestly, I don't know any other place coolant would be able to leak into the combustion chamber. Hopefully the head/s aren't cracked.
But...do a compression test and let us know if there's any cylinders with low compression.
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Old 05-10-2010, 08:48 AM
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It might be a gasket, but they are metal, not the old style so I don't know what would "blow" one.
On my 4.7 the head itself developed a corrosion channel between a water jacket and a cylinder that caused the steam show.
Taking off a head isn't difficult just time consuming since you have to take off the entire front end as well as the top side of the motor to get to it. If you've never done this job before you will need help.
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Old 05-10-2010, 09:09 AM
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Quote:
Originally Posted by strang3majik View Post
or...you can put some of that stuff they were blowing the cash for clunkers cars up with in the coolant, and it'll seal the headgasket long enough for you to sell it
Little trick I learned from a used car salesman aquaintance...lol

But...do a compression check on each cylinder...that'll tell you if its the head gasket or not. But, honestly, I don't know any other place coolant would be able to leak into the combustion chamber. Hopefully the head/s aren't cracked.
But...do a compression test and let us know if there's any cylinders with low compression.
I compression test won't always find a small leak between the combustion chamber and cooling system. A chemical CO2 or leakdown is the way to go.
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Old 05-10-2010, 09:37 AM
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It is a Head Gasket and get ready to spend some bucks my wife’s is in the shop now 01 4.7L Jeep GCL rebuilt motor $3400, install $1700 Chrysler wanted $5500 for the long block by its self and 17 Hr. labor at $100+. Not for me
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Old 05-10-2010, 09:40 AM
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Quote:
Originally Posted by trx4 View Post
It is a Head Gasket and get ready to spend some bucks my wife’s is in the shop now 01 4.7L Jeep GCL rebuilt motor $3400, install $1700 Chrysler wanted $5500 for the long block by its self and 17 Hr. labor at $100+. Not for me
And you can be sure of this because....?
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