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My car idles fine and temp stays low,,,,i put in gear she overheats and boils i just replaced the rad,new hoses and thermo
1995 Mercury Villager

My car idles fine and temp stays low,,,,i put in gear she overheats and boils i just replaced the rad,new hoses and thermo

(1995 Mercury Villager)
she starts fine and stays cool until i put it in gear
How long have you had this problem? a month
Tags: mercury, villager
2 answers & 1 comment
Popular Answer
on October 11, 2019

Engine COOLANT at proper level ? ... Are cooling FANS working correctly ?

IF yes to both questions - - Very strong possibility the water pump ‘impeller’ has deteriorated and is no longer pumping the required volume of coolant throughout the engine !

Very strong possibility!
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on October 11, 2019

When transmission is placed into gear - it demands additional cooling from the system to maintain proper engine temperature - this also requires full volume from the water pump..

Sometimes a bore scope is helpful by viewing the h2o pump impeller through radiator hose nipple (hose removed from pump) it doesn’t take much pitting of the impeller to cause overheating problems .. Observe closely!

This failure is not a common occurrence but it absolutely can and does happen - to any vehicle that utilizes a coolant / water pump.

Considering the year model - this scenario is a very strong possibility.

Good luck!
General Diagnosis
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on October 11, 2019

Engine COOLANT at proper level ? ... Are cooling FANS working correctly ?

IF yes to both questions - - Very strong possibility the water pump ‘impeller’ has deteriorated and is no longer pumping the required volume of coolant throughout the engine !

Very strong possibility!
Sign in to reply
on October 11, 2019

When transmission is placed into gear - it demands additional cooling from the system to maintain proper engine temperature - this also requires full volume from the water pump..

Sometimes a bore scope is helpful by viewing the h2o pump impeller through radiator hose nipple (hose removed from pump) it doesn’t take much pitting of the impeller to cause overheating problems .. Observe closely!

This failure is not a common occurrence but it absolutely can and does happen - to any vehicle that utilizes a coolant / water pump.

Considering the year model - this scenario is a very strong possibility.

Good luck!
on October 11, 2019
Check for leaks first. Top off if needed and then check the fan is working. Also, check the radiator to see if it's blocked up with leaves and debris.
Use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex
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