Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

more fan/coolant questions


Guest Anonymous

Recommended Posts

Guest Anonymous

I'm trying to get a proper sensor going for my cooling fan as

many of you know. So far the two wire sensor on the engine

doesn't kick in soon enough, nor does the 320i radiator

sensor. I don't really want to use a sensor that plugs into the

radiator either-nothing wrong with them, just want to go a

different route. My questions are-what are the routes the

coolant travels in the two operating conditions, i.e. stat open/

stat closed. Can I interrupt one of the hoses by splicing in a

piece of brass or aluminum pipe and threading in a boss for

a "3/8" npt sensor from summit? Are there any more practical

solutions for kicking in an electric fan. Yes, this is basically

the same question as before but nothing's working so far.

thanks again.

Link to comment
Share on other sites

Guest Anonymous

on the outlet of the radiator. When stat is closed the coolant by-passes the rad and goes direct to the engine. Once coolant is up to temp and stat opens coolant goes to the rad. If the coolant is a bit high temp on the outlet of the rad, I'd think that would be where you would want a sensor. Probably the best place also as it can support off the stub from the radiator.

Link to comment
Share on other sites

Guest Anonymous

the hose that connects to the top of the thermostat is long enough for a thermoswitch coupling. This is a BMW part and I don't know the number or which yr 320 it was used on. I lucked out when I needed one. I went to a local pic-n-pay and started looking for one and someone had removed the coupling and placed it on the fenderwell. But it is threaded for the thermoswitch.

If you're using a 320 radiator and mounting the thermoswitch in the bottom of the rad I think it could be done w/ an 82c switch as the coolant is much cooler by the time it reaches the bottom of the radiator, but I haven't tried. However I did try a 91c switch there and it never activated the fan at a reasonable engine temperature. By the time the coolant heated to activation the engine temp was near 220f. With the 91c thermoswitch mounted at the top of the motor the fan is activated at about 200f.

Link to comment
Share on other sites

Guest Anonymous

you're using a BMW unit, the ones with white tops are low temp, red tops are high temp. The project car's cooling system has a 2 sensor/2 speed fan circuit (low temp/low speed, high temp/high speed), and so far, no matter how long the car idles (even on a 100 degree day), the high speed circuit never comes on.

The other car has a one speed fan circuit with a low temp sensor in the water jacket in the bottom of the intake manifold - it kicks the fan on at about 190 degrees F.

If you're using a high temp sensor, it may be the reason your fan doesn't come on.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...