ok as yall might recall on my brothers truck a few weekends ago it was runnin 220 ect and my egts were about 1k at 65-70mph. well after cleaning the turbo because it was sticking and putting in a new thermostat nothing has changed. egts are still crazy high if you ask me and its still runnin 214-220 on flat ground with stock tuning. any ideas on why its runnin hot still. ive got a 4" turbo back with kitty gutted on it so its free flowing exhaust im just not understanding why its so hot. for the ect im going to try a new water pump next week. i did notice though at a stop light the ects will climb a bit until i get going.

 

Sounds like your radiators plugged.

 

the radiator is 3 months old

 

should i pull the innercooler to see if its plugged causing high egts. i cant think of anything else other than that, that would cause high egts

 

Belt and tensioner in good shape?

Sometimes an AC compressor will begin to seize up and can cause cooling issues.

You might get an IR temperature gun and see if each of the exhaust manifolds were running close to the same temps.

 

yea it seems to be. bismic i dont know if you were on the thread about me rebuilding this truck but the motor only has 50k on it. the a/c system works great and ive even tried turning it off and there isnt much drop so i figured the a/c system didnt have much to do with it

 

Is the fan clutch working properly? At that temp you should be hearing it.

 

see im not hearing it still around 230 at highway speeds or after i take off from the stop light. it still has the first factory tune on it. i was thinkin about getting the updated flash but idk if it will help. the coolant though isnt what im so worried about. if i can get the egts down i think the coolant temps will follow

 

If I missed it, my apologies .... what is "crazy hgh"? I only see where you mentioned 1000*F as your EGT. This was at 65 mph. Is this correct.

1000 *F doesn't sound bad to me, but I admit I am not tuned and do not watch the EGT's (yet).

 

no big deal if you missed it i just wasnt sure so to be safe i wanted to fill ya in. it sounds high to me because my dually runs aroun 850 if that pulling the same boat. and without the boat the dually runs 700. this truck unloaded runs around 850, and pulling the boat around 1000. but if i slow down to 60 or so i get the egts to drop to 900 the coolant will drop to around 210 so thats why i am thinkin that they are going hand and hand

 

Thanks. I see what you are saying on the EGTs and the ECT relationship - makes sense.

Here are two ways I look for a weak water pump (not sure how good of a test these are, but it is all I know to do):
1. If you are running down the road after a cold start and your ECT takes off rapidly up to 200 degrees, say within a mile or 2, and your EOT is lagging way behind, say like 120 degrees, you have a lack of coolant flow, perhaps a bad water pump (but it could also be a stuck thermostat, plugged up radiator (internal), your radiator fins (external) are clogged with dirt, or seized idler or tensioner pulleys).

2. Also, disconnect the small hose from the intake manifold to the coolant degas bottle at the bottle end. Start the engine and check for coolant flow out of the hose. You should see a pretty steady stream of coolant exiting the hose to indicate the water pump is flowing coolant. If you see no flow, the pump impeller is most likely cracked.

After that, I would think it is either fueling related or turbo (air) related. Not sure how you can definitely can rule out the turbo - even though you cleaned it, it might still be sticking some?

 

the ects dont seem to rise rapidly. i was watching for that today. i stuck my egde insight on it today from my truck to make sure everything was fine. i need to check the idler pully but i think its ok also. ill do the coolant flow test tomorrow if im not to tired of fishing . im thinkin it might be fuel related or turbo related also but not sure how to check. im holding great fuel pressure 60 psi and even 60 at WOT so i know pressure is good but it might be over fueling. not sure maybe cheez or m-chan could chime in and help. i do appricate the info and how to test info!

 

I would still advise the IR temperature gun test.

If neither of the two techs jump in, then PM them. Hope you get it resolved soon!

 

Do a pressure check on the charge cooler.

Make sure all the charge cooler boots are in good shape.

Make sure all the intake bolts are tight. (don't ask me how I know this! )

You might also check your air filter restriction; could be that your air filter is clogged up.

Your engine is overfueling, trying to make up for boost that it's either losing somewhere in the intake tract, or not making in the first place (from the clogged filter).

-blaine

 

Filter is also brand new and intake is tight. And boots are good. First thing I check was boots. How do I test the innercooler?