Best Answer

In short it's fairly strait forward to replace the thermostat and the water pump on any Chevy 350. First off you must drain the radiator. To do this simply turn the "petcock" located either on the bottom left or right hand side facing the engine on the radiator. Note.....lefty loosey righty tighty doesnt apply in this case as the petcock will turn to the right in order to drain the radiator. Take the cap off to vent but be sure the radiator is NOT HOT. Otherwise, allow it to cool before removing the cap. You can get a pretty nasty burn. Once the radiator is empty remove the TOP radiator hose from the engine. This should only involve removing a hose clamp and then gently twisting the hose until it breaks free from the intake manifold. Once the radiator hose is removed from the engine you are about 2 inches from the thermostat. It's just under where you took the hose off of the engine. Two blots on either side of the thermostat housing will free the housing and reveal the thermostat. When you buy a new one make sure you also get a new gasket. Clean the area thoroughly of the old gasket. (There may be another smaller diameter hose attached to the thermostat housing. If so simply remove it for the installation then reassemble once the thermostat housing is back in place.Use caution to not drop anything into the engine such as pieces of the old gasket. If necessary cover the exposed hole with a clean rag to help prevent contaminating the cooling system. Reverse the dissasembly process to reinstall. It helps to use an rtv blue sealer to keep the gasket in place during the reassembly. Make sure to note the location of the thermostat Then install one of the bolts into the water pump and lower it into place with one hand while ligning up the bolt with the appropriate hole. Once you have one bolt started install another bolt in the opposite side and hand tighten them to hold the water pump in place. Install the other two bolts then tighten in an alrernating pattern. (top left, bottom right, top right, bottom left) Do so in multiple passes as to help promote a good seal on the gaskets. Once tight you can then star the reassembly in reverse of how you removed everything. Last off first on. Once you have everything installed be sure to close the radiator petcock and then refill the radiator. It will take some time to drain into the engine so you will have to repeat the filling process a number of times before the system is purged of all air. Once you have at least 2 gallons of 50/50 antifreeze mix in the radiator you can then start the engine for short periods with the radiator cap off to help "burp" the cooling system of excess air. Once full, run the engine up to normal operating temprature with the radiator cap on. Usually about 15-20 minutes will do the trick. Then check for leaks around all the hoses and fittings you removed and reinstalled. If there are leaks then retighten.

User Avatar

Wiki User

โˆ™ 2011-09-12 23:41:15
This answer is:
User Avatar

Add your answer:

Earn +5 pts
Q: How hard is it to change the water pump and thermostat on a 1974 Chevy Nova V8 350?
Write your answer...

Related Questions

Where is the heater gage located on a 1974 Chevy 350?

It might be a wire going to the thermostat housing, or possibly it connects to a sensor screwed into the intake manifold near the thermostat hosusing.

How do you change a rear main seal on a 1974 Chevy Nova?

Either drop the tranny or pull the engine.

How do you remove a heater core to a 1974 Chevy impala?

How do i remove a heater core to a 1974 chevy impala?

What frames will fit under a 1974 Chevy impala convertible?

A 1974 Chevy Impala frame would work

Will a 1974 Chevy engine bolt up to a 1986 Chevy transmition?


How do you change an ignition switch in a 1974 Chevy pickup?

If the memory is not all worn, turn switch to accessory before removing it, after pulling wheel.

What size gas tank does a 1974 Chevy Nova have?

I have a 1974 nova and my has 15 gallon

What Oil capacity for a 1974-1976 Chevy engine?

Typically for automotive and light truck applications it would be 5 qts with filter change.

What bucket seats will fit in a 1974 Chevy truck?

the seats out of 73 to 88 Chevy or a gmc

Will a 2006 Chevy truck engine bolt up to 1974 Chevy trans?

No it will not, Not even close.

What is the diffirence between a 1974 Chevy nova frame and a 1975 Chevy nova frame?


Where is the fuse diagram for a 1974 Chevy Cheyenne?

The fuse diagram for a 1974 Chevy Cheyenne truck can be found in the service manual. It details the location of each fuse and its purpose.

Can the back glass on a 1973 Chevy Nova fit a 1974 Chevy Nova?

If it is the same bodystyle, yes

Will a 1974 Chevy truck long bed frame fit a 1967 Chevy short bed truck?


What is the wheelbase for a 1974 Chevy C10 pick up?


How do i fix a 1974 Chevy Nova ignition?

whats wrong with it?

How much horsepower does a 1974 Chevy Nova with a 400 have?


Can you adjust a 1974 Chevy novas bumpers inword?

Not likely

Does a 1974 Chevy Silverado have an ecu unit?

NO. No computer on that year.

What type of fuel does a 1974 Chevy Nova take?


What year did electronic distributors begin on Chevy trucks?


What is Compression specs for 1974 nova 350?

Compression ratio on a 1974 Chevy 350 in a Nova was 8.5:1.

What was the price of a Chevy nova in 1974?

1974 Nova sales peaked at 390,537 with the average rate of $2,810 to $3,105.

What are the release dates for Change at 125th Street - 1974 TV?

Change at 125th Street - 1974 TV was released on: USA: 28 March 1974

Will the fenders from a 1974 or 73 Chevy Nova fit on a 1972 nova?