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.

heating up when using engine to slow


Recommended Posts

After an extended drive, and nothing to aggressive, just normal back road driving...I noticed that if I let the engine slow itself going down hills, instead of the breaks that it began to run much hotter. I have never seen this before. It was nice weather, not hot or humid...70's. suggestions? Do these engine's not like that, and it is better to use brakes? just worry about brake fade.

Link to comment
Share on other sites

That doesn't make sense to me, either-

it should cool when you're off throttle... well, as long as you're not

keeping it at 6k in 2nd going downhill...

Ideally, the thermostat would keep everything

equal, but I usually notice it's a little cooler on the downhill

side of a mountain...

I'm wondering if maybe your gauge is wonky, or a ground

is a bit loose on the engine or alternator, and the physical

position of the motor has something to do with it???



"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

Link to comment
Share on other sites

Hmm, mine seems to warm up slightly when useing engine compression to slow at lower speeds (-40). Then roll to a stop, as I accelerate away it cools back down when up to road speed.

From the stop sighn two blocks away, to the house and waiting to get into the garage it warms up noticably from the center of 3 oclock to the top of what would be 3. I do have a condensor in front of the radiator, so that probably accounts for some of it.

Link to comment
Share on other sites

I agree, but it doesn;t I would say that it might be 3.5- maybe 4K rpms slowing it down- nothing to aggressive. The temp guage has to be working correctly as it will actually begin to cool back down under normal driving conditions on flatter terrain. It doesn't get overyly hot...probably up to about 200...but that is about 25 degrees hotter than it normally runs. extremely odd!

Link to comment
Share on other sites

Using the engine to slow you going down hills should actually drop the temp, as the engine is not under load, it is being helped along by gravity pulling your car down the mountain. That is unless you are in 2nd and its screaming at 5k rpm.

Check your oil and water levels. If they are low the engine will still be hot from the uphill drive and may not be 'normal' until you are onto the flats.

Also what plugs do you run, a hotter plug also makes the engine run hotter. Whats the timing like? too advanced and it will run hot too.

Just a few thoughts. Beaner7102

1971 - 2002 RHD VIN 1653940. Agave (stock with Pertronix & 32/36 Weber) - "Cactus"

1972 - 1602 RHD VIN 1554408. Fjord (with 2L motor, 5spd & LSD - Weber 40/40 to come) - "Bluey"

1984 - E30 318i VIN WBAAK320208722176 - stock daily driver

Link to comment
Share on other sites

First, I am no mechanical wiz, but could it be that you have a weak water pump? I have a modified E30 M3 that would heat up at stop lights, etc. and if you blipped the throttle it would cool back down. Turned out to be the water pump. I am sure someone who undestands the M10 waterpump will chime in and correct me if I am wrong. Just a thought.

More former BMW's than it is possible to list.

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...