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13th February 2023, 11:41 AM
#1
EGTS Up Why?
Since doing the Canning, the EGTs on the 3 litre CRD are up higher than they've ever been.
Used to very rarely see it hit 600, now it's only got to be in the mid twenties and it hits 600.
On the Canning we suffered through very nasty corrugations, lots of mud and water.
I think the exhaust is now emitting fuf fuf fuf noise instead of the normal bop bop bop, which sounds like an exhaust leak somewhere.
So the question is, what can make the EGTs increase?
Restricted exhaust? Mud caked radiator? Buggered EGT probe? Leaky exhaust? Leaky join at dump pipe?
I've also noticed an increase in PCV smoke as well.
Thanks for any help.
Last edited by 10G; 13th February 2023 at 12:29 PM.
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13th February 2023 11:41 AM
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14th February 2023, 06:34 AM
#2
Patrol God
Have you noticed any changes in boost ??
Low boost = Egts up, as they have to be in a certain harmony .
Just a brainstorm idea . Maybe the boost controlling vacuum setup dislodged a hose or a leaking intercooler pipe somewhere due to corrugations you mentioned.
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The Following 3 Users Say Thank You to Hodge For This Useful Post:
10G (14th February 2023), Bidja (14th February 2023), MudRunnerTD (27th February 2023)
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14th February 2023, 09:01 AM
#3
Boost may be down a little. Boost gauge is currently busted, I'll get that fixed up and see what it tells me.
Thanks Hodge, that's a good start.
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14th February 2023, 10:16 AM
#4
The master farter
EGR valve could be jammed due to the corrugations?
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14th February 2023, 10:31 AM
#5
Patrol Guru
Clean your MAF sensor. Very easy job but often ignored.
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14th February 2023, 10:44 AM
#6
Now the MAF could be the problem, it was very dusty in sections.
Thanks for the help folks.
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14th February 2023, 09:59 PM
#7
Patrol Freak
Just to add here, do a quick check of VNT actuator function (vacuum):
at idle, is the actuator rod in the raised position, ensure that the lever is resting against vane limit stop screw? yes/no (should be yes), and
then still at idle, pull the vacuum hose off the actuator rod should drop to bottom of stroke promptly? yes/no (should be yes)
As mentioned _ Check that all boost hoses are fitting securely, check for splits/damage, loose clamps. Check your boost reference take off point, hose and connection for leaks.
Last edited by Bidja; 14th February 2023 at 10:57 PM.
2008 GU WAG ST Manual CRD - To do the job
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15th February 2023, 11:29 AM
#8
Originally Posted by
Bidja
Just to add here, do a quick check of VNT actuator function (vacuum):
at idle, is the actuator rod in the raised position, ensure that the lever is resting against vane limit stop screw? yes/no (should be yes), and
then still at idle, pull the vacuum hose off the actuator rod should drop to bottom of stroke promptly? yes/no (should be yes)
As mentioned _ Check that all boost hoses are fitting securely, check for splits/damage, loose clamps. Check your boost reference take off point, hose and connection for leaks.
Thanks @Bidja, I'll do all that. Just got out of the truck. She's running about 100 degrees hotter than it should and low on boost I reckon.
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15th February 2023, 05:03 PM
#9
Patrol Freak
Originally Posted by
10G
She's running about 100 degrees hotter than it should and low on boost I reckon.
High EGTs, Guess this with eng under high load / hauling?
Important to rule out any vac or boost faults / issues first. Good to get boost gauge working.
What boost control method do u use?
What engine mods?
Let us know how it goes.
2008 GU WAG ST Manual CRD - To do the job
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16th February 2023, 09:01 AM
#10
Got the gauge going, it's only making half boost.
Normally it'll peak at 15psi and sit on 13psi at 100kmh on the flat in 5th, that gives me 300+ EGTs.
Today at 100kmh I was boosting around 5.5 with EGTs at about 500+
I got both a Dawes and Needle valve.
The only thing that I have done that could affect it was that I tightened up the large hose from the IC a while back, that's the only thing I've touched. That could have produced a leak I guess, it's the original hose, maybe it's overtightened?
No engine mods.
I'm going to check/replace all the small vacuum hoses around that area.
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