4200 engine rebuild

[mbis]

Did coolant spill out? Will it cool off if you bring it back to idle? Have you check for bubbles in the radiator cap at idle? Fan belt tight? Inspected the waterpump to make sure something isn't screwed up with the vanes?

When the headgasket went on mine (long story) I was smelling coolant blowing out the reservoir bottle while working it hard with a flail mower a long time before the temp gauge started moving.

No none of that happened

 

[mbis]

Did coolant spill out? Will it cool off if you bring it back to idle? Have you check for bubbles in the radiator cap at idle? Fan belt tight? Inspected the waterpump to make sure something isn't screwed up with the vanes?

When the headgasket went on mine (long story) I was smelling coolant blowing out the reservoir bottle while working it hard with a flail mower a long time before the temp gauge started moving.

I hope you don't mind me asking a dumb question but on the water pump the impeller is encased in the housing how would I know if that was bad or not without seeing it

 

[TimberHole]

I hope you don't mind me asking a dumb question but on the water pump the impeller is encased in the housing how would I know if that was bad or not without seeing it

You already said your water pump is good. How did you determine yours was good? Did you replace it?

 

[mbis]

You already said your water pump is good. How did you determine yours was good? Did you replace it?

No someone told me it was good. But do I trust someone who knows about as much as Me? If you don't want to tell me I guess I can ask someone else. Thanks anyway

 

[mike48130]

If you don't have a leak not bubbles or coolant in the oil than you are probably wasting your time with a rebuild. Need to check the thermostat and water pump. Pull them out and inspect. Make sure your belt is not slipping. Pull the belt and see how tight the water pump is, that will be a good indication of the bearing in the pump. How do you know the radiator is good? Pull the hoses and run water thru it to see how it flows, it could just be clogged. Do you see coolant flowing when you pull the radiator cap? Pull it when cold not hot and let it warm up. Should see coolant movement. You need to do a lot more investigating before you open up the engine. Odds are if you rebuild it, it won't fix it.

 

[mike48130]

If you don't have a leak not bubbles or coolant in the oil than you are probably wasting your time with a rebuild. Need to check the thermostat and water pump. Pull them out and inspect. Make sure your belt is not slipping. Pull the belt and see how tight the water pump is, that will be a good indication of the bearing in the pump. How do you know the radiator is good? Pull the hoses and run water thru it to see how it flows, it could just be clogged. Do you see coolant flowing when you pull the radiator cap? Pull it when cold not hot and let it warm up. Should see coolant movement. You need to do a lot more investigating before you open up the engine. Odds are if you rebuild it, it won't fix it.

I assume the radiator is clear and not clogged with Dust and grass?

 

[mbis]

If you don't have a leak not bubbles or coolant in the oil than you are probably wasting your time with a rebuild. Need to check the thermostat and water pump. Pull them out and inspect. Make sure your belt is not slipping. Pull the belt and see how tight the water pump is, that will be a good indication of the bearing in the pump. How do you know the radiator is good? Pull the hoses and run water thru it to see how it flows, it could just be clogged. Do you see coolant flowing when you pull the radiator cap? Pull it when cold not hot and let it warm up. Should see coolant movement. You need to do a lot more investigating before you open up the engine. Odds are if you rebuild it, it won't fix it.

Ok well I took the thermostat out and ran the engine and the water is not circulating

 

[mbis]

I already ran water through the radiator it flows nicely

 

[mike48130]

Ok well I took the thermostat out and ran the engine and the water is not circulating

Replace the pump. Usually a good time to do the belt thermostat and hoses. Lower hose probably has a spring innit to keep it from collapsing. Pull the thermostat and flush the engine. Make sure there is no blockage.

 

[mbis]

Replace the pump. Usually a good time to do the belt thermostat and hoses. Lower hose probably has a spring innit to keep it from collapsing. Pull the thermostat and flush the engine. Make sure there is no blockage.

Ok
Thanks

 

[mbis]

Replace the pump. Usually a good time to do the belt thermostat and hoses. Lower hose probably has a spring innit to keep it from collapsing. Pull the thermostat and flush the engine. Make sure there is no blockage.

When you say flush the engine do you mean run water through it

 

[mike48130]

When you say flush the engine do you mean run water through it

I would start with that. If you still have issues after a new waterpump and thermostat you can flush the whole system with radiator flush which is just a mild acid.

Is the thermostat new? I would pull the belt first and check the wp bearing. If good than try the thermostat first. It's cheap.

 

[mbis]

I would start with that. If you still have issues after a new waterpump and thermostat you can flush the whole system with radiator flush which is just a mild acid.

Is the thermostat new? I would pull the belt first and check the wp bearing. If good than try the thermostat first. It's cheap.

Thermostat is new the first thing I tried. Bearing isn't wobbly and spins nice

 

[mike48130]

Pull the pump and see if the impeller is good. I've had pumps be bad that looked good. Did you put the thermostat in the right way. Some will fit both directions but there is a right way.

 

[mbis]

Pull the pump and see if the impeller is good. I've had pumps be bad that looked good. Did you put the thermostat in the right way. Some will fit both directions but there is a right way.

This thermostat can only go one way. Can't see the impeller it is encased

 

[mike48130]

There should be a rear plate that can be removed. I would just replace it with new gaskets and hoses.

 

[mbis]

There should be a rear plate that can be removed. I would just replace it with new gaskets and hoses.

I took that off like you said
Impeller looks good

 

[mike48130]

There's really nothing in the engine to cause overheating Unless your timing is way off. But if it is running good but overheating you need to look at the cooling system. I would replace the pump and see what happens. New hoses too

 

[mbis]

There's really nothing in the engine to cause overheating Unless your timing is way off. But if it is running good but overheating you need to look at the cooling system. I would replace the pump and see what happens. New hoses too

I want to flush this block out first you think?

 

[mike48130]

I would. Not sure what the pump looks like but if there was an opportunity for internal leaks then the pump just cavitayes and doesn't pump. You need to pull the thermostat to flush the block.