Got this threaded hole

marcjagman · Post by **marcjagman** » Wed Feb 01, 2012 10:34 pm

Got a threaded hole on my inlet manifold, to the left of the thermostat housing and facing the front of the engine. Can anyone enlighten me as to what it's for? I was thinking maybe electric fan thermo switch, can it be blocked of?

ged · Post by **ged** » Wed Feb 01, 2012 10:47 pm

Temperature transmitter.

DEVONMAN · Post by **DEVONMAN** » Thu Feb 02, 2012 8:47 am

It looks like it goes straight into the inlet port so it will be for a vacuum take off for say a brake servo.

Denis

ChrisJC · Post by **ChrisJC** » Thu Feb 02, 2012 1:15 pm

I think it's for the brake servo too.

Chris.

ged · Post by **ged** » Thu Feb 02, 2012 2:25 pm

marcjagman wrote: Got a threaded hole on my inlet manifold, to the left of the thermostat housing and facing the front of the engine.

My mistake, but from the description thought he meant the one as above. The one on the top of the manifold is indeed for the servo spigot.

Regards Ged

Eliot · Post by **Eliot** » Thu Feb 02, 2012 3:19 pm

Yup - brake servo vac port.

marcjagman · Post by **marcjagman** » Fri Feb 03, 2012 9:08 pm

er no, not brake servo it is in a waterway

mgbv8 · Post by **mgbv8** » Fri Feb 03, 2012 9:44 pm

marcjagman wrote:er no, not brake servo it is in a waterway

No its not!!

Its in the inlet runner. Its the vac take off for the brake servo.

The item to the right is the otter switch in the waterway for the rad fan.

harvey · Post by **harvey** » Fri Feb 03, 2012 10:14 pm

The one on the top next to the Otter switch is for the servo, the one on the front next to the thermostat housing (which was the one the original question was asked about) is for the temp guage sender unit. The Otter switch isn't for fan control, it's for a choke warning light.

marcjagman · Post by **marcjagman** » Fri Feb 03, 2012 10:23 pm

Hopefully this will save confusion as to what hole it is, I'm sure it's a waterway.

ged · Post by **ged** » Sat Feb 04, 2012 6:40 am

I was right!
Temperature Gauge Transmitter.

Regards Ged

softdash3.9 · Post by **softdash3.9** » Sat Feb 04, 2012 8:15 am

Rover P6 inlet manifold iirc

DEVONMAN · Post by **DEVONMAN** » Sat Feb 04, 2012 8:28 am

I think the confusion was due to the fact that there is an unpainted threaded hole in the first photograph which is not the one in question.
The hole in question is facing forward and is in the waterway and is for the temperature gauge transmitter.
The one on top of the manifold is for the servo take off and I believe a non return valve screws into it on some models.

Denis

mgbv8 · Post by **mgbv8** » Sat Feb 04, 2012 11:00 pm

DEVONMAN wrote:I think the confusion was due to the fact that there is an unpainted threaded hole in the first photograph which is not the one in question.
The hole in question is facing forward and is in the waterway and is for the temperature gauge transmitter.
The one on top of the manifold is for the servo take off and I believe a non return valve screws into it on some models.

Denis

That makes more sense!!!

Temp gauge sender hole for sure

harvey · Post by **harvey** » Sun Feb 05, 2012 3:19 pm

softdash3.9 wrote:Rover P6 inlet manifold iirc

I think it's early Range Rover.

The V8 Owners Forum -

Got this threaded hole

Got this threaded hole

Re: Got this threaded hole