Duramax Diesels Forum Truck of the Week
  #1  
Old 11-27-2016, 11:50 AM
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Default 05 lly blowing coolant outta overflow

Truck runs cool about 170 but blows coolant outta over flow . Could it be a stuck thermostat ? How do you check for a blown head gasket ? Any inputs appreciated


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Old 11-27-2016, 11:55 AM
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let the pressure out when its cool, top the coolant off. drive it 30-40 miles and let it get hot, park it and checl the top radiator hose in the morning and see if its firm ike a tennis ball. if so pretty good chance your gaskets are done. time for studs
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Old 11-27-2016, 11:57 AM
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Quote:
Originally Posted by catman3126 View Post
let the pressure out when its cool, top the coolant off. drive it 30-40 miles and let it get hot, park it and checl the top radiator hose in the morning and see if its firm ike a tennis ball. if so pretty good chance your gaskets are done. time for studs


Okay thanks I drove an hr home last night should be able to go out and check it now right ?


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05 duramax lly .
mbrp turbo back exhaust straight piped
efi live
s&b mouthpiece
banks intake
sinister egr delete
pcv reroute
bilstein shocks
34.5 nittos on 18" metals
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Old 11-27-2016, 01:26 PM
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Time for head gaskets. Thermostats will not cause it to make it overflow.
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Old 11-27-2016, 01:39 PM
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It will show it's running cool because it's shoving coolant out of the system giving a false reading, I can assure you it's plenty hot. Time for some head gaskets.
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Old 11-27-2016, 06:38 PM
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Quote:
Originally Posted by WVRigrat05 View Post
It will show it's running cool because it's shoving coolant out of the system giving a false reading, I can assure you it's plenty hot. Time for some head gaskets.


Quote:
Originally Posted by Ne-max View Post
Time for head gaskets. Thermostats will not cause it to make it overflow.


Well that sucks trucksnonly got a 145k on it . I haven't google searched it but I'm assuming a couple thousand ?


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mbrp turbo back exhaust straight piped
efi live
s&b mouthpiece
banks intake
sinister egr delete
pcv reroute
bilstein shocks
34.5 nittos on 18" metals
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Old 11-27-2016, 06:55 PM
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Common lly issue. Around here it is around 4 grand to have them done. Parts are around 900.00 with studs. Machine work varies.
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Old 11-27-2016, 07:21 PM
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Quote:
Originally Posted by Parker_ View Post
Well that sucks trucksnonly got a 145k on it . I haven't google searched it but I'm assuming a couple thousand ?


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Depends. Going to do the work yourself or have a shop do it?
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Old 11-27-2016, 07:23 PM
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Quote:
Originally Posted by TheBac View Post
Depends. Going to do the work yourself or have a shop do it?

I'm
Honestly not sure if it's a task I can handle
Alone , either way it leaves me without a vehicle so I might just say screw it and trade it in


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05 duramax lly .
mbrp turbo back exhaust straight piped
efi live
s&b mouthpiece
banks intake
sinister egr delete
pcv reroute
bilstein shocks
34.5 nittos on 18" metals
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Old 11-27-2016, 07:26 PM
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I would make sure the hose is hard in the morning (pun intended) before I got too worked up. Maybe just a bad rad cap...
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Old 11-27-2016, 07:31 PM
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I did exactly as stated above and to my knowledge it doesn't feel like the upper rad hose is stiff like a tennis ball . It isn't soft either tho but I can squeeze it without trying that hard at all


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05 duramax lly .
mbrp turbo back exhaust straight piped
efi live
s&b mouthpiece
banks intake
sinister egr delete
pcv reroute
bilstein shocks
34.5 nittos on 18" metals
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Old 11-27-2016, 07:53 PM
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Quote:
Originally Posted by Parker_ View Post
Well that sucks trucksnonly got a 145k on it . I haven't google searched it but I'm assuming a couple thousand ?


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I blew mine at 40k with a 60 horse tune in 07'.
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Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs.
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Old 11-27-2016, 07:55 PM
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Quote:
Originally Posted by Parker_ View Post
I did exactly as stated above and to my knowledge it doesn't feel like the upper rad hose is stiff like a tennis ball . It isn't soft either tho but I can squeeze it without trying that hard at all


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And if only one cylinder is blown (good thing) it won't be super hard, just hard enough to not squeeze the hose together and push coolant out.

I did mine myself at 19 y.o. With no prior diesel experience in my yard after work, I had 4200 bucks in it with **** ups and extra performance parts.
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05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone

The Blessed Hellride- 08' White GMC Sierra SLT CC/SB,
100k miles. Piston eater.

Wife's ride- 2016 Pearl white Legacy limited 3.6R

Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs.
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Old 11-28-2016, 08:51 AM
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Default 05 lly blowing coolant outta overflow

Quote:
Originally Posted by WVRigrat05 View Post
And if only one cylinder is blown (good thing) it won't be super hard, just hard enough to not squeeze the hose together and push coolant out.



I did mine myself at 19 y.o. With no prior diesel experience in my yard after work, I had 4200 bucks in it with **** ups and extra performance parts.


Alright so I drove about 40 min this am , came home system still had pressure hose was hard as a rock . I bled the pressure off and it became soft . So is it safe to say it's 100 percent blown gasket ? Sorry for the same question over and over I am listening just def want to be as thorough as possible before I go buy a piece of junk car to drive until I can fix this
Edit: never mind its def head studs , did a ton of reading and listening and I'm sure of it . Thanks for the insight . I guess the next question is should I pull the engine ? Or just take hood off and have a little bit of a sore back

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05 duramax lly .
mbrp turbo back exhaust straight piped
efi live
s&b mouthpiece
banks intake
sinister egr delete
pcv reroute
bilstein shocks
34.5 nittos on 18" metals

Last edited by Parker_; 11-28-2016 at 09:06 AM.
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Old 11-28-2016, 09:50 AM
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Put the hood in service mode. If you look at the hinges there's another set of holes, it will allow the hood to be straight up and down. Way easier and can do it yourself. That's a personal preference, myself, I'm not pulling the motor unless it's blown up.

Take a lot of pics, put bolts back where they went if you don't think you can separate correctly or are ADD like me.
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The Blessed Hellride- 08' White GMC Sierra SLT CC/SB,
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Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs.
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