Coolant Flow Restrictors for Heater Core
- Thread starter savegoodautonfg
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Hopefully this will answer some of your questions.
Yes, you can still get the heater core restrictor from Ford
Part # E7VY-18D358-A, but it’s around $16, or you could use a 13 MM socket to do the same thing from everything I’ve read.
Yes you can still get the heater core and hoses from Ford, which personally I think is your best bet.
You’ll only need 1 restrictor, it will go in the inlet hose which is the larger hose, or uppermost of the two hoses that plumb the tubing outlets at the rear of the engine to the heater core connections at the firewall.
The restrictor is designed to reduce the pressure of the coolant particularly during hard acceleration and deceleration, so it’s only function is to protect a fragile heater core design and nothing more.
What the Restrictor looks like
View attachment 453765
Stock Location
View attachment 453767
If you've had a "gurgle, squeal, and/or moaning" noises created (in the 2000-4000 rpm range) in some 5-liter cars (most of which were built prior to 5/3/93). The condition is caused when a restrictor valve moves out of its proper position. The fix involves positioning the restrictor in the engine end of the hose and securing it with a clamp."
This is how you need to locate the restrictor.
View attachment 453769
View attachment 453771
Yes, you can still get the heater core restrictor from Ford
Part # E7VY-18D358-A, but it’s around $16, or you could use a 13 MM socket to do the same thing from everything I’ve read.
Yes you can still get the heater core and hoses from Ford, which personally I think is your best bet.
You’ll only need 1 restrictor, it will go in the inlet hose which is the larger hose, or uppermost of the two hoses that plumb the tubing outlets at the rear of the engine to the heater core connections at the firewall.
The restrictor is designed to reduce the pressure of the coolant particularly during hard acceleration and deceleration, so it’s only function is to protect a fragile heater core design and nothing more.
What the Restrictor looks like
View attachment 453765
Stock Location
View attachment 453767
If you've had a "gurgle, squeal, and/or moaning" noises created (in the 2000-4000 rpm range) in some 5-liter cars (most of which were built prior to 5/3/93). The condition is caused when a restrictor valve moves out of its proper position. The fix involves positioning the restrictor in the engine end of the hose and securing it with a clamp."
This is how you need to locate the restrictor.
View attachment 453769
View attachment 453771
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Founding Member
Go by the first diagram.
Remove the inlet hose from the heater core and slide the restrictor in that end, tapered end in first.
The restrictor won't move around any (or mine hasn't for 17yrs
) because it's pinned next to the end of the heater core, and is a tight fit in the hose.
The second diagram is a so-called fix for the gurgle sound that some say they had is the only reason I posted that diagram.
Remove the inlet hose from the heater core and slide the restrictor in that end, tapered end in first.
The restrictor won't move around any (or mine hasn't for 17yrs
) because it's pinned next to the end of the heater core, and is a tight fit in the hose.The second diagram is a so-called fix for the gurgle sound that some say they had is the only reason I posted that diagram.
