[IMG]http://i66.tinypic.com/mc7qm0.jpg[/IMG]

Hello,

This is my first Volvo and I'm just getting into figuring this out. I have the manual but I can't seem to figure out where is supposed to be attached to this threaded pipe. It sticks out just under the exhaust manifold and is connected to nothing. Thanks for clarifying my ignorance.

These instructions courtesy of Art Benstein. Thanks, Art, as always.





The following comments are my own.

You will also notice a field in the post message/reply form for providing an image but the above method allows you to place multiple images in one message.

My advice, whether you want it or not; keep the image size managable. I believe the original requirement was 640 x 480 max. But that was for images uploaded to the Brickboard gallery. Off site image size does not seem to be that critcal but sometimes people provide pics so large they bleed off the screen.

This one is not too bad. You can see the entire image without having to scroll side to side.






--
'80 DL 2 door, '89 DL Wagon, '15 XC70 T6

Thanks bulletproof (and Art)! Super helpful, and an obvious struggle on my part. Thanks for educating a newbie.
--
Brandon, Pennsylvania

Hi,

I agree with Bruce that you should get yourself a belly pan to stop belt squeals let alone turning the air filter box into a vacuum like water filter.
The right wheel can throw water under the car to the left as far as it throws water to the curb and farther! There is more water on the right side of a car more often because there is a crown in the center of all roads for runoff.

During the past Hoiiday week, it was posted on here that IPD had them on sale for about $2.00 off the regular price of about $20.00.
Don’t know about shipping but if you need tune up items their prices can be and are competitive most of the time.
Get them in the same shipping box and maybe if you spend enough they might cover all of it.

They also offer an aluminum solid plate one that’s rather a high end modification in more ways than one! I have never been so gutsy to justify the expense as I don’t race in rocks or not!

There are many on-line competitors in similar categories like FCP Groton if you want to stay with stock components.

You won’t be sorry countless times!
Remember ... Volvo would not have forfeited profit into the budget of making these cars if it were not beneficial against damage or safety.

Phil

I just ordered and received a belly pan (splash guard, splash shield) from an ebay vendor offering free shipping. Did this, because my usual go-to parts vendors either didn't carry it any longer or wanted $30 to ship one despite filling in an order over $150. Ebay seller "allautomotive" took my order the day before Thanksgiving and Fedex brought the huge box the Saturday after. $27.05. Packed as if it were made of glass, and arrived in perfect condition.

Those who know me here can vouch for the fact I don't discuss parts vendors in the public forum with complaints to give, but every now and then one really merits kudos, or perhaps, needs to adjust their prices to make a profit.

While in chit chat mode, Phil, I have replaced that pre-heater pipe. My mother in law looked at a '92 940 15 years ago from a private seller to notice right away that pipe was missing. It was Regina fueled, and would not have an AMM to cook, but when she decided to buy the car, it was partly because I promised to put that pre-heater pipe back on it, despite my assurance it was just there to help the car reduce warmup time for exhaust emissions. So I ordered one. It was less than $10. Nice and shiny, she approved the new pipe.
--
Art Benstein near Baltimore

If you have a lot of tension and you get a headache, do what it says on the aspirin bottle:
"Take two Aspirin" and "Keep away from children"

Hi,

That is a connection for a corrugated aluminum pipe that runs from the exhaust manifold air heating stove to the bottom fitting on your air filter box.
It is call a preheated air flow to make the engine warmup faster.
What it can do, is destroy or cook your AMM, a $200 item, if the $12 thermostat inside the air box fails to shut a flap over that hot port!

Lots of people just plug the pipe but leave it there to pass the visual emissions test for having all the equipment installed.
Others, like my self, remove the thermostat and add a 5/8” square block of wood, plastic or anything solid to close off the pipe internally.
The whole mechanism inside actually pops free, as it clips in and it might be missing as well!

This apparatus does not affect the emissions test since it only works for the initial warmup.
You are required to have the car up to operating temperature for a smog test when you take it in to begin with.

Both pipes, on either end, look like they are threaded but those round helical ridges, (because it’s not a standard thread form) are only made to engage the spirals of the aluminum hose.

It all comes down to keeping your car in a condition of being and looking neat like it’s maintained.

Phil
Edit:
Whoops, looks like I got right in behind you there Tank!

http://tinypic.com/r/mc7qm0/9

http://tinypic.com/r/34ih7xw/9

I apparently can't figure out how the image hosting in this forum works. Thanks for your patience.

Additionally I just noticed when zooming in on the image that the pipe itself isn't threaded. There is some remnant of whatever was previously attached to it.

This is your pre-heat hose connection.

It goes from the exhaust manifold to the air filter box at the bottom.

It is used to pre-heat your intake air in the winter, however if the wax thermostat located within the air box has failed, then the heated air will continue to come in to the intake via the AMM and 9 times out of 10 it will kill the AMM.

Most of us here remove said hose and throw it away.

Matt

Thanks Matt and Phil! Great answers!

I'll keep it disconnected and avoid the costly fix. I found the opening in the bottom of the air box as well. Occasionally when its really wet out and I go through a big puddle the engine seems to bog down slightly and its sounds like a wet fan. No other way I can think to explain that. This only happens when applying throttle. My assumption has been water in/around intake orifice. Any opinions if I am barking up the right tree, or is this a different issue entirely?

Your description of the car in large puddles makes me think it doesn't have the belly pan in place. If it does not you should install one. It plays a major role in protecting your engine, belts, and steering rack.
--
Bruce S. near D.C.

The belly pan is also an integral part of the cooling system of the car. It creates a low pressure area below and behind the radiator. When the car is at speed this helps airflow across the radiator.

Well, looks like I'm purchasing a belly pan and plugging a hole designed into my air box!

Thanks to Bruce and Michael for the info on the belly pan!