Last post on May 08, 2012 at 4:17 PM
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Mazda 626, Sedan
#2030 of 2044 Rocker Cover Gasket Leaking
May 18, 2011 (3:22 pm)
Hi Guys, I have a mazda 626 LX 1999 model. Last week I went to a mechanic for oil change and he told me that my car's Rocker Cover Gasket is leaking and is a fire hazard. I didn't ask him to change because it looks like selling a problem when it is not there.
Can you guys please tell me what is Rocker Cover Gasket and how can I confirm if it is leaking and is it really an issue if not replaced.
#2031 of 2044 1993 Mazda 626..HELP!!
May 23, 2011 (9:57 am)
My 93 Mazda 626 was flashing a hold button so I had 2 speed sensors changed..while in shop the mechanic fried my brain box and fuse box so I found used ones to replace..the motor was changed to a probe before I bought it and now the car's RPMs accelerate when in drive or park randomly which then makes the car sputter or cut off..I cannot find any shop in my area who works on Mazda near Hammond, IN...HELP!!
#2032 of 2044 Re: Rocker Cover Gasket Leaking [saeedabidi]
Jun 07, 2011 (10:54 am)
Also known as a valve cover gasket, it commonly starts leaking oil after about 100k miles. If you have a 4 cylinder car, it is not hard to replace. The gasket is rather expensive because you also need to replace rubber grommets that go under the bolts. Typically they come with a valve cover gasket if you buy a set from FelPro (old by Advance Discount, NAPA, etc). The copst for a 4 cylinder car shoudl be about $ 40 for the gasket and the gromments. The V6 set is about $ 85.
The biggest problem with a leaky valve cover gasket is that the oil will eventually leak into the spark plug wells and flow into spark plug wire boots and cuase engine miss.
I just got done replacing the timing belt, tensioner, idler pulleys, water pump, cam and front crank oil seals, camshaft end plugs, valve cover gaskets, timing belt covers(old ones cracked at mounting tabs with age and heat) , spark plugs, plug wires, and coolant overflow bottle (4th on this car) on my 1999 ES V6. To replace the rear valve cover gasket on my car, you must remove the intake manifold, which makes this a very tedious repair. I did the work myself. I had a leaky rear valve cover gasket and timing belt was due in 10k miles anyway. I have 292,000 miles on the car now.
#2033 of 2044 Re: Rocker Cover Gasket Leaking [p100]
Jun 22, 2011 (1:26 pm)
Thank u so much for the advice....it worked!!! no more miss....I still smell oil and my engine light is still on but other than that the car drives fine...Thanks again for all ur help!!!!
#2034 of 2044 Re: Rocker Cover Gasket Leaking [mazdamad40]
Jul 21, 2011 (6:35 pm)
I am glad you got it fixed. I hit 300,000 miles tonight in my 1999 Mazda 626 V6! That says something about longevity of this car. Mine has a 5 speed manual transmission. Both engine and transmission are original and have not been rebuilt to date.
#2035 of 2044 Re: Rocker Cover Gasket Leaking [p100]
Jul 22, 2011 (5:41 am)
I agree with you that this car has longevity. I own a mazda 626 LX V4 1999. So far I have only hit 100,000. I am glad to learn that it can take you upto 300,000 miles.
#2036 of 2044 626 Fan problems
Sep 03, 2011 (8:26 am)
My 2002 626 is overheating beacuse of the fan. The water pump, fan, radiator, temperature sending unit and thermostat are all brand new. Problem is that the fan is not running when it should. It stays on for about 20 minutes and then something shuts it off. The A/C fan runs when I turn the A/C on. It's the other fan, though thatis the problem. The overheating occurs when I've driven a while and get stuckin trafiic. I turn on the heater and that drops the temperature. Could it be the fan relay? I replaced the sending unit and it is still happening. Any thoughts or suggestions would be greratly appreciated.
#2037 of 2044 Re: 626 Fan problems [gw53]
Sep 09, 2011 (8:52 pm)
Try to change Coolant Temperature Sensor.To prevent overheating you can also disconnect connector from Coolant Temperature Sensor and fans will work constantly but A/C will not work.
#2038 of 2044 Re: 626 Fan problems [alex_berg]
Sep 17, 2011 (10:14 am)
Thanks for responding Alex. I had already replaced my coolant temperature sending unit. That wasn't it. I finally took the car in.
What they found was the coolant system had to be bled. The shop told me the car had to warm up at 2500 rpm, then be cooloed down completely. Then they removed the top hose from the radiator and filled the system. That was 8 days ago. Since then, it's been running cool again, no overheating.
I appreciate your response.
#2039 of 2044 1999 Mazda 626 LX V6 - 97k miles
Nov 18, 2011 (2:49 pm)
i am posting this here seeking your advice. i have a 99 626 LX V6 with 97k miles. a month ago, the temp gauge in the car was going to max and the car would stop. took it to a local repair shop and they noticed water pump leak and replaced it. repair guy said he is seeing a white smoke coming out of the car and suggested i check for coolant very often. after driving for 25 miles, car stopped again and i filled it with coolant and it was gone in no time. Now the repair guy is telling that it is a head gasket issue and would cost me 1500 repair it. i am not sure if its worth to repair it at this mileage or not. I dont want to start the repairs and get surprised with other issues. what else can go wrong.
So far, i did CV boot, spark plugs and spent around 2400 since 2008 on this. need your advice on what other things to be checked before i get into this repair.
thanks in advance.