- Joined
- Aug 21, 2015
- Messages
- 489
- Reaction score
- 2
- Location
- Tucson
- My Car
- 1973 Mustang Sportsroof. Currently a work in progress!!!
I saw this on the web. Thoughts? The part number is S 333 192 in the pics he displayed.
Well Never mind...I see it's already on here.
What do we use for a replacement?
For all of you 351-C owners out there. Some are probably not aware that the cooling system in the block of a 351 Cleveland is unique to this engine. In an effort to improve the emissions from the engine the engineers have like a two stage water flow built into the block. If you remove the thermostat housing that is mounted to the block and not the intake like most Ford engines. Look down into the block and you should see a baffle or plug in the block with a smaller hole in the center. The original thermostats for this engine were unique in that they had a hat shaped piece that went into the opening when the engine reached operating temp and changes the flow of the coolant.
The correct thermostats are getting pricy for sure but none of the replacements are correct and can lead to heating issues with the Cleveland engine. Both 2-V and 4-V are the same. I was lucky to find a stash of the correct ones and here are some pictures and the part numbers on the boxes. I have sold all of the extras I had for $25.00 each and went like hot cakes. If you do not use this thermostat you will need to do a modification that someone came up with that is also not cheap. Google the coolant flow for the Cleveland to better understand it. I have 7 of the Mustangs with this engine.
If you find any of the correct thermostats at your local parts house scoop them up and sell to members. They are very difficult to find and the only one that works correctly. If your Cleveland has not been cooling correctly this could be the reason.
Well Never mind...I see it's already on here.
What do we use for a replacement?
For all of you 351-C owners out there. Some are probably not aware that the cooling system in the block of a 351 Cleveland is unique to this engine. In an effort to improve the emissions from the engine the engineers have like a two stage water flow built into the block. If you remove the thermostat housing that is mounted to the block and not the intake like most Ford engines. Look down into the block and you should see a baffle or plug in the block with a smaller hole in the center. The original thermostats for this engine were unique in that they had a hat shaped piece that went into the opening when the engine reached operating temp and changes the flow of the coolant.
The correct thermostats are getting pricy for sure but none of the replacements are correct and can lead to heating issues with the Cleveland engine. Both 2-V and 4-V are the same. I was lucky to find a stash of the correct ones and here are some pictures and the part numbers on the boxes. I have sold all of the extras I had for $25.00 each and went like hot cakes. If you do not use this thermostat you will need to do a modification that someone came up with that is also not cheap. Google the coolant flow for the Cleveland to better understand it. I have 7 of the Mustangs with this engine.
If you find any of the correct thermostats at your local parts house scoop them up and sell to members. They are very difficult to find and the only one that works correctly. If your Cleveland has not been cooling correctly this could be the reason.
Last edited by a moderator:
