I have a 93 accord Ex with 174 K miles - and have been having coolant leak problems for a while. A few months ago when it got overheated I had to replace the radiator and a bunch of other hoses. Recently though, the coolant level has been going down every day - I kept filling it to avoid over-heating. When I took it to the mechanic, he discovered a leak in the water pump. I got the water pump replaced plus timings belts etc. as well - since he was going to open it up anyways. After putting the pump, when he went on a test drive, the car was spewing smoke like a railway engine. He is saying there is a leak in the engine head that is causing coolant to leak and wants to have the head machined or replaced. This could cost me $1500 +/-. Could there be any other cause? what I am not sure of is why was the car not spewing smoke when I took it to the mechanic. He says replacing the water pump now builds more pressure inside the engine and coolant is now leaking through the craks al LOT more. I need feedback please. ZP
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Re: coolant leak throuhg engine head?
The diagnosis is correct, either the head gasket is blown or the head is cracked or both, but in any case the head will have to be planed/machined to insure it is flat, otherwise the new head gasket will leak.
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Best test,,NAPA sells a combustion leak tester(balkamp #700-1006) A tube of liquid that will change color if combustion gas is in the cooling system.Thinking you may be right about a head gasket problem or possibly a crack in the head.
It comes with instructions and is cheaper than having a shop guess at the trouble.
you may have a head gasket that is leaking coolant into the cylinder. That would explain the reason why you can't find a leak, it is going into the engine and out the exhaust. Check your oil after running the engine for a few minutes to see if it looks milky or cloudy grayish look to it. If so, then it is also leaking coolant into the engine block.
if you can smell it it must be in the cab andf the only way the coolant can leak in there is throuhg the heater matrix which is located under the dashboard, a way to find out is to check the floor for any excess moisture. if this is the case then it will def be that.
Just a heads up, $10 bucks will buy you a seal kit for the P.S. pump. I topped mine off for a couple months, then the oring on the high pressure line (from pump, front center) blew and dumped the reservoir in a matter of miles.
The line can be a stinker to get off, recommend driving the car for a few minutes to heat up the pump a little. Don't forget the 20MM wrench.
well if the head gasket has been replaced you shouldnt smeel any coolant. But have you check your coolant hoses???? for leaks or any coolant on the driveway, when your car has been sitting there overnight!???
I had a similar problem on my "93 Ford probe. The engine idled pretty rough with shakes, Turned out to be a head gasket leaking engine coolant into the cylinder during low rpm's. At fast rpm's it was fine becuase the internal cylinder pressure was greater than the hot coolant pressure & would prevent the coolant from leaking in.
A friend has the same problem with his "94 Blazer 4.3 L, throttle body injection, manual tranny. He hasn't fixed it yet, It started a few weeks ago & is getting worse. His gets a fast idle with hiccups which causes the engine shake. He already checked the EGR valve. He also has a severe exhaust problem, Not oilly but very gray & terrible smelly, but only when the fast idle problem happens. THis fast idle hiccup problem starts when the engine is warmed up.