TD5 Exhaust Manifold Temperatures?

**IanP** · 3rd November 2012, 09:29 AM

I do not have an EGT gauge and was wondering can anyone tell me what temperatures a TD5 manifold would reach?

The reason is I am still struggling with an ideal solution to the stud breaking problem. I see that the nuts on the exhaust manifold need to be resistant to loosening by vibration, but also ideally allow for heat expansion of the manifold.

I know some use spring washers, but I am not sure whether they would retain their spring tension over time?

Ian

**twr7cx** · 3rd November 2012, 10:17 AM

Depends on your vehicle and how it's being driven and other various factors, but 150 - 900*C would probably be reasonably accurate for most vehicles.

**gavinwibrow** · 3rd November 2012, 10:53 AM

Originally Posted by twr7cx

Depends on your vehicle and how it's being driven and other various factors, but 150 - 900*C would probably be reasonably accurate for most vehicles.

x 2 - but, that of course is the exhaust GAS temps, not necessarily the actual manifold temp. 900 is pretty up there. In a long haul uphill tow, I got to 750 as my highest so far.

**twr7cx** · 3rd November 2012, 11:35 AM

Originally Posted by gavinwibrow

x 2 - but, that of course is the exhaust GAS temps, not necessarily the actual manifold temp. 900 is pretty up there. In a long haul uphill tow, I got to 750 as my highest so far.

Running TD5Insides big tune I can exceed 750*C on a flat straight with the vehicle unloaded - I reckon if I was willing to risk it, and I'm not, 900*C would be achievable. I have the MadMan EMS to alarm me at 700*C so that I can back off.

**dswatts** · 3rd November 2012, 11:43 AM

My driving style changed after fitting EGT gauge, have seen very close to 1000 C

I now drive to keep it below 700.

**Disco EMU** · 3rd November 2012, 04:41 PM

I'm just about to install and EGT gauge ... but doesn't all this depend on WHERE the probe is installed?

My probe will be in the EGR blanking plate as opposed to the exhaust manifold pre-turbo.

**Blknight.aus** · 3rd November 2012, 05:03 PM

horizontally slotted manifold eyes

circle in the middle .5mm+(either side of center) on 2+4 1mm+ on 1+5
add cone washers
back with spring washers and use copper nuts on standard or high tensile (not stainless) studs

while its all off slice, moon or remove the webs.

heavy application of copper gasketing paste on both sides of the gasket and use either 5 individual gakests or a mono metal gasket.

Solved

**twr7cx** · 3rd November 2012, 05:37 PM

Originally Posted by Disco EMU

My probe will be in the EGR blanking plate as opposed to the exhaust manifold pre-turbo.

???

The EGR blanking plate is on the exhaust manifold pre-turbo.

**Blknight.aus** · 3rd November 2012, 06:13 PM

exactly where you want it.

but I think he ment it will be preturbo in the EGR blanking plate as compared to sitting in the manifold just in front of the turbo.

just make sure you use one with a long enough probe ideally you want to sneak into the joining area between 1+2 ports without touching the manifold..

**IanP** · 3rd November 2012, 06:24 PM

Originally Posted by Blknight.aus

horizontally slotted manifold eyes

circle in the middle .5mm+(either side of center) on 2+4 1mm+ on 1+5
add cone washers
back with spring washers and use copper nuts on standard or high tensile (not stainless) studs

while its all off slice, moon or remove the webs.

heavy application of copper gasketing paste on both sides of the gasket and use either 5 individual gakests or a mono metal gasket.

Solved

Dave, when you say 'cone washers' are they the Belleville washers or a non spring washer? The other question is about the spring washers you are using - are they a particular 'type' as my understanding is that 'normal' spring washers lose their 'spring' above 400C.

Cheers
Ian

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