What Interchanges?

[Titleist16]

I am getting a 78 engine rebuilt right now and it needs a new timing cover. The engine that's in my car now I believe is a 68 (atleast the block is). What parts off of the 68 will fit on the 78. The main things are timing cover, valve cover, oil pan, pulleys, dampner, etc. I also need to buy a new water pump, and I was wondering if water pumps changed over the years or will any year pump work any year engine?

 

[WhitePony]

I'm assuming that you are talking about both engines being 200's. If so, your water pump, valve cover, pulleys, timing cover and dampener will all transfer. You should most likely use your original oil pan and oil pickup, as they are different on different cars. For example, my new engine comes out of a 79 Fairmont, which has a rear sump. The original 65 Mustang pan is a front sump. If yours is the same, than you will also have to move the dipstick to the front mount and plug the rear hole. As far as water pumps, there are two different ones for the 200. One is for non AC cars, and the other is for cars with AC.

Hope that helps. I'm sure that wiser heads will chime in as well.

Kris

 

[Anonymous]

Kris, do you know if the water pump that is for cars with A/C really does perform better? If so, I might go with one later on. I can't think of a reason to not move more water through the system, even if it is a little more then needed.

Ryan

 

[WhitePony]

Honestly? I have no clue. It makes sence that with the extra drain on the engine that the compresser causes, they may have designed it with a higher flow rate. I do know that the AC model is longer. I'm sure someone here knows.

Kris

 

[PLP6400]

The only difference in the water pumps is some had an open impeller and others had a plate on the back of the impeller. The other changes were the later models had a longer shaft. There was not one specified for AC. I have used both on the same vehicle and noticed no difference.

 

[WhitePony]

Hmmm... I was quoting from the Falcon Performance Handbook. I dunno then.

 

[Anonymous]

Moving more water means you are removing more heat. If you remove heat you are robbing power from your combustion process. Water cools the outside of the cylinder walls and if that temperature is cooler then the inner temperature will be cooler and the combustion process will try to put more heat into it instead of into expansion.

The only reason cooling is necessary at all is to keep the metals from melting under the combustion temperatures. If materials were readily available that would withstand combustion temperatures just fine over time I don't think cooling would be used at all.

-Dan in Atlanta