D22 Navara EGT probe location

Submitted: Saturday, Jun 07, 2008 at 16:40

ThreadID: 58480 Views:8859 Replies:4 FollowUps:3

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MattyM

Has anyone fitted an EGT gauge to a D22 Navara ZD30 & if they have were did they put the thermocouple? I was looking at drilling & taping the housing just after the turbo but I'm not sure if there is anything in there. I think going into the exhaust pipe might be to far away & I didn't want to pull off the exhaust manifold just to fit the probe. Any ideas would help.

Cheers
Matty

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Reply By: Member - Vince B (NSW) - Saturday, Jun 07, 2008 at 18:07

Reply By: Ross H (QLD) - Saturday, Jun 07, 2008 at 20:51

Reply By: Member - Bucky (VIC) - Sunday, Jun 08, 2008 at 08:20

Sunday, Jun 08, 2008 at 08:20

Matty

Ian, from thermoguard recommends that the thermocouple be placed before the turbo, to give the most accurate readings. Apparently it gives the most accurate reading of what is happening inside the motor.

thermoguard

Cheers
Bucky

AnswerID: 308468

Follow Up By: Member - John F (NSW) - Sunday, Jun 08, 2008 at 15:50

Sunday, Jun 08, 2008 at 15:50

I got excited about fitting one of these, because of the obvious benefits, but had a close look and baulked at the amount of work required in stripping away the turbo if fitting upstream, or finding enough meat downstream to tap the 1/8 BSP thread required.
Decided that light footed, sensible driving of the standard Hilux would suffice.
I would be very nervous about an upstream fitment by a mechanic I didn't know (or an ambitious DIYer) due to risk of subsequent exploding turbo from to a little bit of swarf left behind...

Regards, John

FollowupID: 574524

Follow Up By: Ross H (QLD) - Sunday, Jun 08, 2008 at 22:05

Sunday, Jun 08, 2008 at 22:05

John

You can safely drill the hole with out taking your turbo off.
The manifold is cast not mild steel , when you drill and tap make sure you have plenty of the thick grease like cutting compound on the drill and tap and clean often. When you drill cast you don't get alot of swarf like mild steel you mostly get a fine powder which sticks to the cutting compound. Just drill slowly and clean drill and tap often.
Chances are what does get through will blow out when you start car. At temp of between 300 and 650 deg C it won't stay there for long.

Regards Ross

FollowupID: 574645

Follow Up By: Member - John F (NSW) - Monday, Jun 09, 2008 at 10:24

Monday, Jun 09, 2008 at 10:24

Ross

Agree - "chances are" what does get through will blow out when you start, but remember it has to "blow out" past a very finely balanced and toleranced device that can spin at 100000 rpm. As far as I know the turbo is designed to cope with combustion by products, not particles of metal, no matter how powder like. Don't think you can be sure of no little lumps of caste iron as the drill breaks through...
I expressed my reservations to Ian from Thermoguard, via email, and he very kindly took the time to respond to my query and stated that he had not envisaged anyone doing an upstream install without first disconnecting from the turbo.
Would be interested to get any data on rates of premature turbo failure from those with upstream EGTs, downstream EGTs and no EGT..., especially if it was known for sure whether the install was done properly - (ie. disconnected from turbo) - in the case of upstream installs.
Good luck, but would not do mine that way.

Regards, John.

FollowupID: 574739