FD coolant loss and over flow. Techs and Experts only please

Mazda Forum Mazda Classifieds Photo Gallery Member List Search Contact Us Sponsors
Models Mazda News Mazda Recalls TSBs Timeslips Register Login

FD coolant loss and over flow. Techs and Experts only please

Printable Version

Mazda Forum >> Mazda Vehicles >> Mazda RX-7 >> FD coolant loss and over flow. Techs and Experts only please

Page: [1]

Message

<< Older Topic Newer Topic >>

FD coolant loss and over flow. Techs and Experts only p... - 3/7/2008 7:36:58 PM

sanders1977

Posts: 6
Joined: 9/22/2007
Status: offline

Hey, I'm a Mazda master at a small dealership in Va, I'm not old enough to have much experiance with the FDs, mostly an RX8 guy buy force not choice. Anyway, the question is, do the FD water pumps have any problems breaking their impellers. Or is there anyother reason they wouldn't over heat while at idle but over heat at speed. (the radiator is ok, the cap is ok, the t-stat is ok,)

Thanks.

Post #: 1

RE: FD coolant loss and over flow. Techs and Experts on... - 3/10/2008 5:16:27 AM

Mazmart Trini

Posts: 393
Joined: 10/1/2007
Status: offline

No the impeller on the 3rd gen is not known to break off like the plastic impeller on the 92-95 929. Have you pressure tested the cooling system to assess whether it is losing coolant into the combustion chamber? The FD "IS" however is known for its difficulty in removing air pockets while filling the cooling system. It is easy to think that the system is completely bled when it is not.

_____________________________

Mazmart. Leader in quality new & used Mazda parts & Auth. Dist. of AutoExe Perf. parts.

Orange Crush Pearl 05'''''''' 6S

(in reply to sanders1977)

Post #: 2

RE: FD coolant loss and over flow. Techs and Experts on... - 3/30/2008 12:31:54 AM

2slow4stock

Posts: 3
Joined: 3/29/2008
Status: offline

I would suggest checking the coolant seals. It doesn't matter if you work with a FB, RX5, FC, FD, FE's... There all the same engine rotary. Do as mazmart suggested get a pressure tester, or another way to check is fill the coolant to brim pull the ecu fuse and have someone crank the car over. If the coolant level doesn't over flow or pour out of the filler neck then the seals are fine. (Leave the radiator cap off also) That is another way I check to see if the coolant seals are still good if you do not have a pressure tester around.

(in reply to Mazmart Trini)

Post #: 3