1999 Porsche Boxster Logo
Anonymous
Anonymous Posted on Jun 28, 2009
Answered

63k 1999 boxster have had antifreeze evaporating? Living in Desert. Oil is clean, no leak in head gasket. No spills on garage floor. Fill over flow 6 to 8 oz about every 1500 miles? I'm still learning about the auto. Is this possible with smaller radiators? I had it checked at dealer with other maintence requirements. All in all, car runs great!

Answer This Question
  • Anonymous Jun 28, 2009

    It's one explanation, over flow container seams small compared to

    other auto's owned. US products mostly/ curious if expansion will

    worsen with AC use in hot 100 plus? Porsche has sensor float in

    over flow to assit in protection of low antifreese/ idiot light on temp gauge in cockpit. Bottom Line / saving motor issues / repairs, etc. Thanks

×

1 Answer

Anonymous

Level 3:

An expert who has achieved level 3 by getting 1000 points
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.
Vice President:

An expert whose answer got voted for 100 times.

  • Master 534 Answers
  • Posted on Jun 28, 2009
Anonymous
Master
Level 3:

An expert who has achieved level 3 by getting 1000 points
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.
Vice President:

An expert whose answer got voted for 100 times.

Joined: Jun 02, 2009
Answers
534
Questions
0
Helped
256066
Points
1670

Check that you are not overfilling the cooling system.
Header tanks need to have some space for coolant expansion.
The system coolant level may stabilise at the lower level.

  • Anonymous Jun 29, 2009

    Expansion is directly related to engine coolant running temperature. With A/C running on a hot day the motor coolant will run at a slightly higher temperature as it:-

    1) is providing the additional power for the A/C compressor / fan motors,

    2) The engine coolant radiator runs a little hotter, as its cooling efficiency is reduced by the additional heat dissipated from A/C condensor, which is usually in the engine coolant radiator air flow.

  • Anonymous Jun 29, 2009

    P.S. If the loss of collant persists, a new coolant system pressure cap is the next logical step.

×

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
2answers

Replaced water pump on a 1999 7.5 GMC .Fill radiator antifreeze went in oil pan why
..wwwoooaaa.... sounds like you have either: a cracked head, a cracked block, a leaking head gasket, leaking intake gasket,..your antifreeze should NOT mix with anything...

.UNLESS YOU POURED THE ANTIFREEZE INTO THE OIL FILL NECK!!!
Read full answer
Sep 19, 2017 • GMC Cars & Trucks
0helpful
1answer

2006 pt cruiser oil leak three small drops all with in a foot and a half of each other
When the head was removed to replace the head gasket, likely oil was 'spilled' down the sides of the engine block. If it wasn't completely cleaned, it may have accumulated on the frame cross member or other components below the engine. I would clean up the drops on the floor and watch for additional evidence for a couple of days. If they keep appearing, take your car to the shop that did the work and have them check it out for you.
Read full answer
Aug 26, 2017 • Cars & Trucks
0helpful
1answer

How do I check for a blown head gasket on my 1990
Pretty much same answer as I gave for 87 Reliant see below. Shops have equipment to do cylinder leakage test. Do basic stuff below before doing last test ...cylinder leakage...which costs $$$.

Main point you are losing antifreeze/water. Check to see if you have water on the dipstick mixed in with oil. If so...probably a head gasket. If oil looks normal..... Before you do any test, tighten every hose connection. Check for loose connection into antifreeze reservoir. Sometimes there are small cracks on top which lets out pressure from cooling system. Look for leaks on water pump and radiator. Look at spot where you park the car...any liquid on floor? Not sure?..Put piece of cardboard under car to see if liquid is dripping from car. No leaks?...Start with a pressure test of the system. The pressure test is simply equipment that replace the radiator cap, a hand pump connected to it then air is pumped into cooling system. You watch the gauge to see if pressure is dropping. If pressure does not drop ..problem is most like a worn radiator pressure cap or stuck thermostat.. Do not buy the kind with button on cap to push down and release pressure. get original type and correct pressure. If overheating still, thermostat could be stuck, replace. Overheating of engine causes vapor lock, bubbles in fuel, which causes car to stall and kill. When cools off, fuel cools down and fuel will flow through fuel system again. Large amount of oil disappearing with overheating also sounds like head gasket or cracked head....Tighten up all bolts to gaskets, look for oil leaks on garage floor or driveway. If engine has developed a miss when running, pull plugs out and look for wet fouled plug. If antifreeze leaking into cylinder...plug tip will be whitish, if oil leaking into cylinder, grimey oil fouled. Do compression test on cylinder that is fouled and that will pinpoint if bad head gasket or cracked head. When doing compression test, radiator cap is removed and you listen to hear bubbles in radiator from the cylinder leaking into cooling system. 87 Reliant not worth pulling engine apart if head gasket or cracked head. Best oil treatment to reduce oil consumption is "Engine Restore" Used on my 58 Impala 348 tri power for 28 years. If I did not add it after oil changes it used oil and smoked....I swear by it for ANY engine after 100,000 miles.
Read full answer
Oct 19, 2014 • Cars & Trucks
2helpful
2answers

What is the problem with my car,it overheats after an hour driving then shuts off?
the water pump is likely shot
Read full answer
Oct 19, 2014 • 1987 Plymouth Reliant
0helpful
2answers

Oil leak onto garage floor either coming from oil pan gasket or oil filter not sure wich one
Clean the filter and pan with a spray cleaner, run engine for a few miutes.
recheck oil leak.
Probably is rear main seal leaking, very common trouble.
If not leaking much, keep drip pan under car to keep floor clean and drive on.
Most cars do leak after they age a little. The black line in the middle of the road is oil leaking from cars. Very common.
Read full answer
Sep 28, 2010 • Honda Passport Cars & Trucks
0helpful
2answers

My Radiator pushes the water back out to the point i always have to top it off but there are no leaks on my garage floor. is that normal?
head gasket gone and its burning it
Read full answer
Apr 19, 2010 • 1990 Ford Aerostar
1helpful
2answers

Oil clean, oily antifreeze, blue smoke
Bet it's either a bad head gasket or intake gasket.
Is there any wetness around the area where the engine
head meets the block? Pooling around or near the intake plenum/manifold?
Read full answer
Nov 27, 2009 • 1999 Daewoo Nubira
2helpful
3answers

Antifreeze/coolantleak
Check the oil for traces of coolant (oil will be milky in color) and oil cap too. If oil has coolant in it head gaskete needs to be replaced. Also check the floor inside the cabine (espetially passenger side)
If it is dump there is leak from heater core. Also open engine block
Coolant might spray onto hot engine and evaporate.
Please kindly let me know if the information was usefull for you or you need more info
Good Luck
Read full answer
Feb 05, 2009 • 1996 Ford Explorer
6helpful
4answers

2002 GMC YUKON COOLANT KEEPS EVAPORATING
if you dont see antifreeze leaking anywhere,its the head gasket,check your oil dipstck,the antifreeze is probally mixxing with the oil as it leaks thru the gasket and will give the oil a milky white color on the dipstick,if you start to see white smoke from the exaust then its leaking into your exaust port,either way head gasket and change as soon as possible,you dont want it in the oil cause you can seize the motor
Read full answer
Jul 08, 2008 • 2002 GMC Yukon Denali
2helpful
2answers

Possible cracked block or head
A cracked block often results in oil in the antifreeze. A cracked head or blown gasket is often heard while accelerating plus it my chug or miss. Take it to another garage and get the system pressure tested. I am not sure if thats what you meant by "a carbonation test". Check for milky looking oil on the dipstick first. If its normal then have the garage inspect the head for leaks using an ultraviolet light around the heads. It may a clogged rad or a faulty water pump too, even a faulty rad cap. Let me know any more info when this is checked. I hate to see someone ripped off.
Read full answer
May 24, 2008 • 1997 Ford Explorer AWD
Not finding what you are looking for?

View Most Popular

1999 Boxster

  • Cars & Trucks

Related Question

Replaced water pump on a 1999 7.5 GMC .Fill radiator antifreeze went in oil pan why

  • GMC Cars & Trucks

Related Topics

496 views

Ask a Question

Usually answered in minutes!

Popular Questions

Porsche radio code

2000 Porsche Boxster

2003 Boxster Fues

2003 Porsche Boxster

Access rear trunk release cable

2002 Porsche Boxster

Porsche key fob

1999 Porsche Boxster

1999 Porsche Boxster : key

1999 Porsche Boxster

Check Out the Latest Top Trucks Report!
Check Out the Latest Top Trucks Report!

View all Fixya Reports

Top Porsche Experts

ROBERT GARCIA
ROBERT GARCIA

Level 3 Expert

926 Answers

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

15088 Answers

Are you a Porsche Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...