Need everyone to see this: Exhaust Gas Temperature Stuff.

Vanislpajero · Post by **Vanislpajero** » Sat Oct 26, 2013 10:15 pm

Many of you probably have the same amount of questions as I have when It comes to running a 4d56 engine in your pajero or delica. What are completely exceptable Exhaust gas temperatures for these categories

Around town: Basically flat land with some hills and traffic. typical speeds of 25-60 mms
On the highway: lets not push it now...keep it below 100kms
Up some BC hwy Hills: The Coquihalla for example
fully loaded: kids and camping gear and out the door...Drive to the lake.

These are some of the readings I have got

Around town: I can easily reach up to 900F. I do live in a hilly city and Im not pushing the truck hard at all
Heading back home: Usually an 80 km/h drive I can exceed 1200F up the slightest hill just trying to keep up to traffic
On the Hwy it hovers around 1000F
Fully loaded is a complete joke...Cant keep up with traffic have to drive 90 km/h and it still can reach temps easily up to 1200

Im starting to think there are other hidden issues with my Pajero. Any Thoughts People?

Lets keep this thread to the 4d56T. Anyone who runs one of these engines of course

Rattlenbang · Post by **Rattlenbang** » Sun Oct 27, 2013 12:33 am

Pretty much what I get, maybe a little warmer. You don't say where your probe is

Some folks think it can make a big difference.

thedjjack · Post by **thedjjack** » Sun Oct 27, 2013 8:46 am

Back in my Delica days (last week).... Probe in EGR plat digital gauge:

I never saw 1200 ever
around town cruising 500ish accelerating maybe 900 (never ever push over 500 until engine in operating temperature)
highway trying to go 90-100km/h on North Island Roads maybe 1050 pushing up hill but typically under 1000...
Hottest temperature in my memory was 1130ish but let off right away...

Shut down not until under 350....

For a diesel these temperatures are for an engine working hard..... compare to 6.2L NA diesel they see 900 as pushing it... Cummins 6BT forms see 1150-1200 as extreme and those are solid blocks of cast iron....

I wish had a gauge on my old Willys with the Mercedes Diesel 5 cylinder (OM617) but climbing the turbo glowed cherry hot... that was a serious well built motor....

Vanislpajero · Post by **Vanislpajero** » Sun Oct 27, 2013 1:33 pm

yes it is a pre turbo probe

Erebus · Post by **Erebus** » Sun Oct 27, 2013 5:17 pm

My probe is post-turbo.

Routine driving I see 800-1100, up mild hills or headwinds, easily up to 1200. Long up hills like the Coquihalla I'll be down to 80 km/h and the EGT will get up to 1400 and coolant temp will get near redline.

I never shut off the engine until the EGT is down to 500.

Sounds to me like thedjjack's gauge shows about 200 degrees lower than mine. If I waited for 350 before shutdown, I'd be idling for 5-10 minutes at least.

Rattlenbang · Post by **Rattlenbang** » Sun Oct 27, 2013 5:31 pm

Erebus wrote:... and coolant temp will get near redline.

Wow, that sounds like there's an issue there. I've never been able to get it above 3/4, even in 36 degree heat climbing a hellish hill out of the Okanagan.

Erebus · Post by **Erebus** » Sun Oct 27, 2013 6:41 pm

Rattlenbang wrote:
Erebus wrote:... and coolant temp will get near redline.
Wow, that sounds like there's an issue there. I've never been able to get it above 3/4, even in 36 degree heat climbing a hellish hill out of the Okanagan.

L300 or L400? From everything I've read on the forum, for a L300 it is pretty normal if you have the proper thermostat. Not enough airflow through the rad.

lrp374 · Post by **lrp374** » Sun Oct 27, 2013 6:59 pm

I find that in my case EGT is more related to boost pressure and rpm. If I can keep my boost around 15psi and rpm over 2700 my EGT will never go over 900. In time the water temp will rise and when it does I just back off on the fuel for a while. I also don't shut it off until EGT reaches 500. I can't imagine getting EGT over 1200 ever as it is easy to control.

thedjjack · Post by **thedjjack** » Sun Oct 27, 2013 7:53 pm

Erebus wrote:My probe is post-turbo.

Routine driving I see 800-1100, up mild hills or headwinds, easily up to 1200. Long up hills like the Coquihalla I'll be down to 80 km/h and the EGT will get up to 1400 and coolant temp will get near redline.

I never shut off the engine until the EGT is down to 500.

Sounds to me like thedjjack's gauge shows about 200 degrees lower than mine. If I waited for 350 before shutdown, I'd be idling for 5-10 minutes at least.

I would be surprised if it was off...I climb the Coquihalla through the snow shed in 3rd gear and 50km/h...

by the time I drive around town the motor is always under 350 once I pull in the driveway... I have never seen 1/2 up the temperature gauge...rebuilt copper rad...new pump...etc

I think the 5 speed has an advantage the transmission does not use the radiator...

I had a modified airbox (3 inch straight in air not the restrictive stock intake), the "ghetto snorkel", 2.5 inch side exhaust with high flowing muffler....maybe it helped...

I also think I my fuel was light never black smoke and extremely clean aircare (idle only test)

1400 is serious temperature

Rattlenbang · Post by **Rattlenbang** » Sun Oct 27, 2013 10:28 pm

Erebus wrote: L300 or L400? From everything I've read on the forum, for a L300 it is pretty normal if you have the proper thermostat. Not enough airflow through the rad.

L300. Like I commented on another post the L300 rad has enough capacity for a big block V8. I tried to block half of it with cardboard to help it warm up faster, made no difference.

Rattlenbang · Post by **Rattlenbang** » Sun Oct 27, 2013 10:31 pm

lrp374 wrote: I can't imagine getting EGT over 1200 ever as it is easy to control.

I'll agree with you there. Ease up on the throttle will do it every time. It's a choice we all make. IN my rig, I find that it reaches ugly temps right about when I can just see the exhaust give out a faint trace of black smoke.

Firesong · Post by **Firesong** » Mon Oct 28, 2013 8:47 am

With my 5 speed l300 it always warmed up fast and I had never seen the water temp go high. Winter was fantastic with the heat it gave off within 5-10 minutes. I blocked the lower rad off more for keeping the snow out of it when fishing or having fun. In high winter wind it helped keep it warmer

I've never had the temp rise pulling a small utility trailer loaded with 6 people and camping gear in the mountains. Kinda miss it a bit. My l400 is a fast warmer too

Jordan · Post by **Jordan** » Mon Oct 28, 2013 5:15 pm

L300 automatic with probe in EGR blank plate. Normal driving 500-800, up hills I try and keep it around 900, it will only break 1000 for a second or so going up a hill or with a headwind till I notice and ease back on the pedal. I drive by the gauge and am always adjusting my driving to keep it happy. I apologize to anyone who has driven behind me.

Rattlenbang · Post by **Rattlenbang** » Mon Oct 28, 2013 8:53 pm

1000 isn't a problem. From what I've garnered online, posted in this forum, danger is supposedly at 1400. Personally I keep it under 1200 because not certain how much is lost passing through turbo.
Another thing I haven't seen addressed is probe location; I've discovered that how deep you place it can have a big impact on temps registered.

Erebus · Post by **Erebus** » Wed Oct 30, 2013 5:25 am

Mine seems to measure the temperature of the metal it is mounted in, rather than the temp of the gasses passing by. Otherwise the temp would drop much faster than it does. But I'm fine with that, 'cause that's much more what I want to know.

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