threads
Page 1 of 1
Mazda Engine General \  coolant leaks

coolant leaks

Mazda Engine General Mazda Engine Mazda Tech
views 4925
replies 9
following 4
 
ridinlow84   +1y
I just bought my 93 B2200. Having some trouble with getting it going. The guy I got it from said he thinks he blew the head gasket, yet the more I look the less i believe that. I got it to turn over but not run. Thats not my big concern, what is would be that when I put water in the radiator it leaks out from somewhere on the left side of the motor. I am new to mazdas and not sure where to take it from here. I like this truck and it will be a killer ride someday. Just have to get from step one. Any help, I thank you for.
toddluck   +1y
see if the water is coming out of one of the freeze plugs
paparoach1983   +1y
^^^^definetely the freeze plugs man and they aint that hard to fix. either
ridinlow84   +1y
That's definately my next check, a lot of people are telling me that. they also say it may be a cracked block, I just don't see that happening. These guys took good care of this truck, that seems very intense for this truck.
mazdatweaker   +1y


First, welcome to the website.

Second, "left side of the motor" means you looking at the engine from the front (carburetor side), or you, sitting in the drivers seat (exhaust side)?

I really doubt it's a freeze plug, anyway.

These engines have a metal coolant supply tube that runs around under the exhaust system on the left (driver's side) that will spring a leak. There is a welded flange that a bolt goes through and engine vibration can cause the tube to fail.

The right side of the engine carries a number of rubber 8mm hoses that can fail. . .and if that is where your leak is, the only solution is to start replacing all of them. A '93 means they may all be 17+ years old.

The only reliable way I have found to locate water leaks is to use a pressure tester connected to the engine. You fill up the radiator with water, connect it to where the radiator cap would normally go, pump it up like a bicycle pump to 18 psi (1.5 bar), and watch for water leaks.

Added edit:

The reason you pump it up higher than normal cap pressure is becuase you need to find marginal areas before they fail on their own somewhere.

You also need to use the tester after you do your repairs to make sure you have found the only leak.

Water leaks are usually. . .fix one, find another.
ridinlow84   +1y
I am telling it from looking at the engine. carburetor side, and a pressure test is not needed. The water comes out without the motor on, or any pressure when the cap is off. I put it in and it comes out. My best view seems to be that it comes somewhere from the motor and rolls down the center of the motor.
mazdatweaker   +1y


-------

Golly, sorry all that sound advice fell on deaf ears.
ridinlow84   +1y
None of it my friend, fell on def ears. I take all advice from you guys. You guys are the authority on this. I really have never confronted a problem like this. I'm just a little stressed about it. So if I seem like an ass, im sorry. I think anything is fixable. Yet, i like so many of us is working on a limited buget and feel this guy I bought it from screwed me.
ridinlow84   +1y
So after going through all this. I have discovered where the coolant is coming from, at least so far. The intake manifold gasket is leaking like a sive. The guy complained that when he started it up white smoke came out and coolant was dissapearing, now I know why. If thats the biggest thing that has happened to this truck then i'm doing ok. I have some maintenance to do. The regular stuff, like oil change, clean the carb, run all my system cleaners and put some better gas. All in all it seems for now, im lucky.
ridinlow84   +1y
So I found out that the water was coming from the intake manifold gasket. I replaced the gasket and the O2 censor. Now that its been running a little bit, I seem to have water coming from the motor somehow. It's coming from the front bottom of the engine near the lower pully. I think it could be the rad hose or water pump. If you guys have any suggestions let me know, all info will help. Thanks.
Page 1 of 1