removing intake manifold for ECT replacement. '94 940

Hi everyone this is my first post here. Its good to find a wealth of
knowledge and expertise on these great cars. Thanks in advance.

I've recently dumped the codes on my 1994 940 and it looks like the
cause of my rough idle is a faulty ECT (engine coolant temp) sensor. I
plan on removing the intake manifold to better access the ECT sensor. I
dont need to entirely remove the intake, just move it back away from
the block a few inches. Question is, is it possible to leave everything
(fuel rails, injectors, throttle body, etc) on the intake manifold
while I do this? Thanks again.

Roland

 

There is no need to remove the intake manifold to extract the ect sensor
just disconnect the connector release the pressure in the cooling system
then remove the sensor you will lose some coolant
Glenn

--
"*-344-*Never Forgotten"
Is for the New York City Firemen who lost their lives on September 11,2001.
The official count is 343, but there was also a volunteer who lost his life
aiding in the initial rescue efforts. And I will never forget them as
long as I live,
nor should any American.

 

The ECT sensor is under intake manifold runner #3. I couldn't imagine
trying to get to it without pulling up the intake manifold. Again, this
is for a '94 940. Also there are two temperature sensors under the
intake manifold. The first, which is for the in-dash temp gauge, is
under the first manifold runner so it is very easy to get to. Perhaps
you're thinking of this one. The second, which is the one I'm trying to
get to, is a sensor for the ECU, and is unreachable by any tool or any
hand I've ever seen. Thank for the response though. I should have been
more clear in my original post.

 

Just pull off the intake air hose and the throttle housing. If you file
or cut the corners off the old sensor you can fit a craftsman 19mm deep
socket over the sensor. Add a six inch wobble extension, then a swivel,
then a 14-18" extension. Lock the whole mess with your left hand and
unscrew the sensor from near the brake master cylinder reservoir. If the
coolant isn't hot you can snake the new sensor and washer back into
position with your fingers. Use a small stubby flat blade screwdriver in
the plug to gently start the sensor into the threads, switching to
fingers at the first sign of resistance. If you filed away the corners
on the new sensor you can use the socket method to get it tight.
Otherwise there isn't very much room to tighten it up with a wrench,
even with the manifold completely out of the eay.

Bob

 

http://brickboard.com/FAQ/700-900/EngineMechanical.htm#ManifoldGasketReplacement