Tip & How-To about Cycling

How to inspect,diagnosis and repair minor over heating problem in under 2 hours. Copyright © by Mustgo on Dec 2009 Thanks for viewing my Fixya tip post. My goal is to solve the most common over-heat,running hot on stop and go traffic and intermittent cabin heating problem (no heat) The target audience is DIY'er who has a car that's just starting to over-heating and has about 2 hours to ran though my check list. === The first part is basic universal safety. Follow by steps the required to fully diagnose the root cause of the problem. Example:air pocket in coolant system VS worn water pump VS blown head gasket. THE INSPECTION Follow by THE FIX. ============ If you are just getting the initial sign of over-heating then you will be able to replace the thermostat,gasket,black RTV,coolant mix and 50/50 mix coolant temperature sensor and get back on the road for under $80. For those who has leaks on the radiator,water pump the repair cost will be much higher. Losing coolant and having WHITE smoke coming out of the tailpipe after 15 minutes of warming up is a sign of blown head gasket. This is an internal head gasket damage and the engine head(s) must be remove to do a head gasket job. ======= My tip is for folk what are encounter over-heating on the first week. Hopefully under 3 times of over-heating. Repeat over heat will warp the aluminum head(s),blow out radiator hose(s) and radiator. ======= SAFETY FIRST MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD! MAKE SURE safety goggles are on at all time. RAN THIS TEST IN A WELL VENTILATED AREA ONLY! You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test! === When the car is completely cool,check the electric fan(s) for smooth rotation. Make sure there is not wobble movement or touching surrounding plastic. Clean/check/change the thermo/temp sensor,contacts and wires. ==== CRC Electrical Contact Cleaner is the ideal chemical to speed up the cleaning job. ==== Clean the metal contacts on fan relay,inside the relay socket and fan socket. Follow the sensor all the way to the firewall to make use it's in perfect condition. Inspect other wiring for cut,and exposed wiring. Use 3M high temp. electrical tape to protect damaged portion of the wire. === THE INSPECTION THIS IS A 30+ minutes JOB. The longer you can monitor the coolant system will give you a better idea of the condition of the coolant system. Excavate air pocket in coolant system / check for head gasket leak Air pocket can be trap inside the coolant system. The water pump's turbine / fins is totally ineffective when there is not coolant surrounding the water pump. ===== This test will kill two birds with one stone. ===== Most radiator shop charge $75 just to excavate / air purge the coolant system. ===== Top of the coolant reserve tank to the COLD / COOL / LOW level. Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) . Keep the coolant reserve tank cap in a safe location. The goal is to lift the vehicle higher to monitor the air pockets and let it escape. The radiator should be 8-20" high from the stationary position to let the air pocket to escape. Let the car ran and start monitor the temperature. Monitor for air pockets escaping from coolant reserve tank. Small amount of bubbles is OK at 1-5 minute mark After the thermostat open up at 195-210 F,Electric fan should turn on automatically If your vehicle has a secondary electrical fan then turn on the A/C and all lights,radio,and electrical items to ensure the fan is operation. 5-12 minute mark or after high idle you should see less bubbles. If you DO NOT see any in rush of bubbles when thermostat opening between the 5-12 minutes mark then the maybe partially stuck or rusted badly inside the thermostat hosing. Give the thermostat housing few gentle taps. (follow the TOP large radiator hose to the top portion of the engine) If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak. A coolant pressure test is also a must to pressurize the coolant system to locate addition leaks. Examples:radiator,head gasket,freeze plugs,or water pump Let engine cold down,lower the car onto level server and top off coolant reserve tank to the TOP / FULL /HOT level. Start monitor for coolant lost everyday. === THE FIX If the radiator cap is over 5 years old or rusted badly then change it. The spring can be weaken and will not hold pressure. I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses. Thermostat,gasket and black RTV is not expensive and it should be change every 4 years or 48,000 miles. A coolant flush is require every 2 years or 24,000 miles. Check your service log for the last coolant flush. Low heat condition is cause by combination of stuck thermostat,low coolant level,dirty coolant system and worn turbine / fins on the water pump. If the water pump has over 85,000 miles on it then water pump can SLOWLY leak into the time belt cover. The turbine/fins on the water pump can erode badly after 96,000 miles. Monitor coolant level and check for water pump,radiator,coolant hose leaks. Place a larger cardboard under the radiator,water pump or timing belt cover. Monitor the coolant drip and inspect the problem area accordingly Visual Inspect your coolant reserve tank for bubbles when the temp. is near 195F+. (after a long drive) If you see hydrocarbon leaks then you should stop driving the vehicle until a shop do a pressure test and dye tests. === If my post is helpful to you then please rate it on the lower hand corner!

Cycling Logo

Related Topics:

Related Questions:

1 Answer

error code= two red flashes, lockout/ no flame

Trane XV80 hard lockout, 2 flashes, Can't be reset - DoItYourself ...

www.doityourself.com > ... > Gas and Oil Home Heating Furnaces
Jan 10, 2013 - The only way I can get diagnostic Red LED light to reset is to switch ... a2 flash with absolutely no operation from the furnace does seem to ..... inducer gets a demand you should get a pressure switch error code 3. ... the flame sensor wire and giving the furnace a heating demand after resetting power twice. Luxaire Furnace Blowing Cold - 8 Red LED Flashes
Mar 1, 2010
Winchester furnace diagnostics
Feb 14, 2010
American Standard Freedom 80 - Cold Air - Getting Error Code 9 ...
Nov 20, 2009
York ignition lockout due to retries
Dec 29, 2008
More results from www.doityourself.com

7 Tips and Tricks to repair your Furnace DIY - YouTube

? 13:25
Dec 18, 2012 - Uploaded by JRESHOW .
cause this fault. 2 RED FLASHES: This indicates that thenormally open pressure ... The furnace will lock out for one hour and then restart. 7 RED FLASHES: This fault code indicates that the flame could not be established. This no-light ... problem. Bothheating and cooling operations will be affected. Check

Jan 23, 2016 | Heating & Cooling

1 Answer

Hope to turn on Sylvania 6413 TC 13" Tv using circuit board

Where can I download an operator's or repair manual for an ...

2 hours ago - how do you program a olevia 542-b11 with the tv buttons ,I do not have a remote ... Hope to turn on Sylvania 6413 TC 13" Tv using circuit board.

I need help with my Sylvania TV - ecoustics.com

www.ecoustics.com > Forum > Home Video Forum > TV Forum
Dec 10, 2004 - Anyone know how to set the mode to video without using a remote. ... Where can I obtain a schematic for my Sylvania 13" TV/VCR combo - Model SSC132? I can see no physical damage to parts on the circuit board, but need a service manual to ... The unit will not turn on when the "on" button is pressed.Missing: 6413 ‎tc

How to Repair Your Plasma TV With Blinking LED - YouTube

? 2:52
Dec 13, 2009 - Uploaded by The Dollar Guy
How to Repair Your Plasma TV With Blinking LED ... TV has both the Samsung screen AND the matching ...

Dec 12, 2015 | Sylvania Televison & Video

1 Answer

all dash lights on,overheating

Fixya just published my coolant system troubleshooting guide.

You can view it FREE HERE

Please rate my FREE tip if it is useful to you.



Dec 07, 2009 | 1991 Volvo 240

Not finding what you are looking for?

303 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Cycling Experts


Level 3 Expert

76109 Answers


Level 3 Expert

102366 Answers

John Egan
John Egan

Level 2 Expert

73 Answers

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

Answer questions