EGT Question - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 13 (permalink) Old 12-19-2006, 01:23 AM Thread Starter
 
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EGT Question

I have been noticing lately it seems to take longer to cool down then before, I ususally let it cool down to 300 degrees. It only takes a min. or less but still think it seems little longer and also noticed it was little higher egt too running down the road.. it still runs great and no changes. This could be just me but what could cause that if I am right???

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post #2 of 13 (permalink) Old 12-19-2006, 01:42 AM
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Dirty air filter?
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post #3 of 13 (permalink) Old 12-19-2006, 02:18 AM
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I'm gonna say, less air moving through. Either a dirty air filter, boost leak worn turbo.

Before my mods my egts where high. Couldn't ever get it to cool down to 300 degrees. After new turbo,egts while towing 14k don't get above 1100 degrees. cools down quickly too.

'00 cc f 350 a few mods, and a bts tranny.

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post #4 of 13 (permalink) Old 12-19-2006, 04:12 AM Thread Starter
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I just cleaned my pro guard filter.. I have heard about oil in the y intake tube??? I will check for boost leaks as well.. How can I tell about if the turbo is worn?? this could just speed up my turbonetics turbo buy...lol
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post #5 of 13 (permalink) Old 12-22-2006, 06:39 PM
 
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Turbo wouldn't be causing the EGT prob. Check for exhaust leaks, boost leaks, dirty air filter etc.
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post #6 of 13 (permalink) Old 12-22-2006, 06:44 PM
 
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Ummmm....... yes, a bad turbo can and does cause a whole host of of egt problems.
Don't believe me, take the intake boot off and chuck a rag in the compressor wheel while it's running, then see what happens to your egt's as you drive.

If the turbo is not operating efficiently, it is just one big frickin restriction in the exhaust which will cause egt's to sky rocket.

OP, first thing that comes to mind is exhaust leaks.
Check for exhaust leaks.
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post #7 of 13 (permalink) Old 12-22-2006, 06:48 PM
 
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Yeah I see your point. Guess if your worried about it you could check the compressor wheel for play, other than that you could rule out the turbo though. Doubt it's the turbo.
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post #8 of 13 (permalink) Old 12-22-2006, 06:48 PM
 
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Quote:
Originally Posted by 99powerstroke
I just cleaned my pro guard filter.. I have heard about oil in the y intake tube??? I will check for boost leaks as well.. How can I tell about if the turbo is worn?? this could just speed up my turbonetics turbo buy...lol

Feel for end play, side to side and more importantly in and out. Check for free rotation and any compressor wheel contact with the compressor housing.

I have the specs at home on my Ford CD if you want to break out the dial ind, I would just check it by hand.

For reference. My stock turbo at 100K has NO perceptible in out play, and the slightest side to side, which is normal to feel the clearance of the sleeve bearing that will be taken up by oil when the engine is running.

My buddies turbo on his 94 after 280K, has LOTS of end to end play and probably 3/16" side to side.

His turbo will stall completely out under hard accel, you should watch the pyro needle move when that happens. :Thumbup:
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post #9 of 13 (permalink) Old 12-22-2006, 06:52 PM
 
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I assumed your turbo is making good boost because you have a gauge, if not then better start checking stuff out.
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post #10 of 13 (permalink) Old 12-23-2006, 03:27 AM Thread Starter
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i do have an exhaust leak.. the pipe looks to have come undone from the down pipe.. its very little but would that cause the egt's to stay up little bit longer then before..
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