Question about 1998 Mazda 626

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Engine not starting after I had an engine owerheated problem

I was driving when suddendly a hose joining the radiator and the engine exposed. The engine started overheating. I stop the car and pour water in the radiator, after that my engine is not starting. What problem do you think it make have, as when Im turning the key its not boosting the engine. I replaced the hose but still not starting. My car is a mitsubhisi Galant vr-4 (v6 dohc 24v) engine.

Cheers
Ash

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I sure hope the engine was running when you put water in it. if not you could have locked it up. if motor turns over then check all your plug wires and elec.connections.

Posted on Mar 11, 2009

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2 Answers

Thermsastat location


Most thermostats are located where the top radiator hose joins the engine, your thermostat may in the bottom radiator hose

Dec 01, 2015 | 2001 Mercury Sable

1 Answer

How to replace thermostat


The procedure is fairly generic on the Ford and other non-transverse engines. First think of direction of coolant circulation. In radiator, coolant flows under gravity (and negative pressure as will be seen) to the bottom radiator hose and through it to the intake of the water pump. (The pump is directly aft of the fan with the vibration damper and accessory belt drive pulley sheaves in between.) The pump then forces coolant through a port into the engine block and galleries; and also force coolant through the heater coil circuit which returns it (also) to the engine block. Under pump pressure, the speed of which is governed by engine RPM (crank rotational speed), the coolant circulates back through the coolant pump via a second engine block port until (like an 8 track tape)...until the coolant has heated (by combuston chamber heat sinking) to t'stat (thermostat)-regulated engine-normal-operating temperature, at which point the coolant flow though said engine bock recirculation port abates and is supplanted by coolant flow through the t'stat and out the engine and back to the radiator (inlet) through the upper radiator hose. So it's clear then, that where the upper radiator hose joins the engine block (near the top of the engine) there also will be the thermostat, held in place by a connector fitting or fittings to which the upper radiator hose couples on one end, and which bolts onto an engine block outlet port and flange on the other end. At that point, it is a simple matter of unbolting that coolant flow port fitting to find the t'stat squeezed in and concealed behind. Of course, you will want to have let the engine cool (to the point where upper radiator hose is squeezable), and to have disconnected that upper hose from the radiator and held it aloft to reduce spilling and then lowered to capture any spillage. (The engine having cooled, the t'stat will be closed and preventing any outflow into the hose; and the cool engine block coolant level will have have retreated under gravity to its lowest level...below the t'stat. Now that the t'stat has been removed from the hose connection flange, you will have noted beforehand its direction and orientation top to bottom...because the new t'stat must fit in the exact same manner. In case you overlooked it, those are also embossed on the new t'stat. Now remember this: each new t'stat must be installed with a new overlap seal ring, but WITHOUT any other sealant or gasket sealant material (the seal is not a gasket despite what you might read or see) and its overlap of the t'stat forms a double seal layer sufficent to contain and prevent any coolant seepage. So, now that you've clamped in the t'stat with the hose fitting and restored upper-radiator-to-engine-block hose connection, you need only to pour any captured coolant back into the radiator, screw on the radiator cap, start the engine, and bring to operating (t'stat open) temperature. Then relieve radiator pressure with radiator cap and note that coolant is circulating in the radiator. If not yet circlating, wait a while until the new t'stat opens. Finally, after engine off and cool-down, check and top the coolant level to about 1 inch below bottom of radiator filler tube.

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1 Answer

How to change thermostat


Instructions
    • Trace the top radiator hose from the radiator to the location where the hose secures to the engine. The metal cover that the hose connects to houses the thermostat.
    • 2Remove the two 10-millimeter bolts that secure the cover onto the engine with a wrench. If you cannot reach the bolts or you are using a socket/ratchet, remove the radiator hose from the metal cover by removing the radiator hose clamp.
    • 3
    • Lift the metal cover off the thermostat to expose the thermostat. With the radiator hose still attached to the cover, lift upward on it to drain the fluid back into the engine. Push the cover and the hose off to the side. If you removed the hose, simply lift up on the metal cover and place it off to the side.
    • 4Pull the broken thermostat out of the engine and place a new one into place. The new one should be orientated in the same manner as the old one to ensure proper fluid circulation.
    • 5Lift the old gasket off the engine and place the new gasket into place. The new gasket should remain dry throughout this process.
    • 6Bolt the metal cover back onto the engine using the old bolts. If the radiator hose was removed during the tear down process, secure the hose back onto the metal cover with the radiator hose clamp.

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2 Answers

Finding the thermostat


Just follow the upper radiator hose from the radiator to the engine, where is connects to the engine remove the hose and the cover under it to expose the T-Stat. Drain about 1/2 gallon of coolant out before you start work. Bleed the air from the cooling system (refer to service manual for this year and engine type) after the T-Stat is replaced to prevent poss overheating.

Mar 05, 2012 | 1996 Mercury Sable

1 Answer

Overheating quickly after a few seconds of driving


1. OPEN THE BONET
2. OPEN THE RADIATOR CAP
3. CHECK THE FLUID INSIDE WHICH SHOULD BE UP TO THE NECK. IF NOT FILL IT WITH COOLANT .
4. START THE ENGINE AND IDLE (WARNING:- KEEP YOUR HANDS AND FINGERS AWAY FROM THE RADIATOR FAN SINCE IT START AUTOMATICALLY WHEN HEATED AND STOPS WHEN COOLS. ITS ALL AUTOMATIC)
5. SEE IF THE FLUID INSIDE THE RADIATOR IS GASSING OR EMITTING AIR BUBBLES. IF IT IS THEN YOU SHALL HAVE TO GET THE HEAD GASKET REPLACED WHICH HAS PROBABLY DAMAGED DUE TO HEATING. CHECK IF THERE IS ANY LEAKAGE AND THE RADIATOR HOSES ARE NOT LEAKY.
6. IF ALL THE ABOVE ARE OK THEN SHUT DOWN ENGINE CLOSE THE RADIATOR CAP CAREFULLY AND RESTART THE ENGINE CHECK RADIATOR FAN SHOULD START WHEN THE TEMPERATURE NEEDLE REACHES AT QUARTER OR MORE BUT NOT ABOVE THE HALF LEVEL. MONITER IT CLOSELY AND SHUT DOWN BEFORE THE TEMPERATURE GAUGE REACHES CLOSES TO RED.IF HOSE IS DAMAGED THEN GET A NEW ONE AND REPLACE WHEN THE ENGINE TI FULLY COOL DO NOT TRY WITH WARM ENGINE AS IT COULD BURN YOU.
TO REMOVE THE RADIATOR HOSE LOOSEN THE WIRE CLIP WITH THE HELP OF SCREW DRIVED AND PULL OFF THE DEFECTIVE HOSE FROM BOTH END IF YOU HAVE PROBLEM TRY WITH THE HELP OF A SMALL SCREW DRIVER NOT TO APPLY FORCE WHICH MAY DAMAGE THE NIZZLE.FOR LOWER SIDE HOSE YOU SHALL HAVE TO GO UNDERNEATH THE CAR AS THE RADIATOR LOWER HOSE IS NOT EASY TO REACH.

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1 Answer

I have a 90 GMC Suburban with 350 engine. Started losing radiator fluid. But a gallon of radiator fluid in it, started it, ran it for a while. Let it cool off. Checked radiator fluid. Has brownish,...


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2 Answers

Where is the thermostat located in my 1994 caprice classic?


To locate the thermostat follow the upper radiator hose to the point where it enters the engine. The thermostat is located below the coolant inlet that the hose is connected to.

To change it:

You're going to lose some coolant, so have a bucket or other container, and some fresh coolant ready. Follow the upper radiator hose to the point where it's connected to the engine. The hose is clamped to a metal housing (water inlet) which is bolted to the engine. Remove the bolts (not the hose) and lift the housing to expose the thermostat (may require a little prying with a screwdriver or similar tool). Note how the old thermostat is fitted (which end is up), lift it out of the engine, and then remove all traces of gasket from the housing and the engine. Install the new thermostat and gasket, replace the bolts, add coolant as necessary, and you're done.

Before you start the job though, check the condition of your upper and lower radiator hoses. If they show any signs of wear, fraying, or fatigue, you might as well replace them too.

BillB

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1 Answer

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