Your '67 mustang wasn't a 300. The 300 was NEVER installed in the Mustang, or any other Ford passenger car in North America. The 'Stang would have been either a 200 or a 240.
The installation problem remains - without removong the manifold getting the new plug in is virtually impossible - and replace ALL FIVE when you are at it.
The 200 straight six was available, the 289, the 289 HP, and the 390 v8, I believe.
But the point is to strip the engine down to the point you can get at the welch plugs, and twist them out of there. I usually do it with a beat up screwdriver or long punch.
Then use a suitable driver (or socket that you dont give a damn about) and carefully tap the new ones in.
As others have mentioned these are NOT freeze plugs. They are there to wash out the foundry sand after the block is cast, and for nothing else.
I dont really know when the 427 crossbolt was offered, if indeed it ever was. I have heard it was, but have never seen one. In 1968 I got one of the Hubert Platt 428 Cobrajets. At the time, they said I could order a 427 but ONLY with 4 speed tranny, and no warranty worth discussing. Dealers here lie a lot.
The 240 was available in everything except the Falcon and the Mustang based on it. In 1969 the 250 cube 6 was available in the 'stang - but you are right - never a 240, much less the 300. The ONLY six in '67 was the 200, as the 170 was history by then.(at least in the Mustang). It was still available in the falcon until 1972.
The 427 was (at least officially and theoretically) available in the Mustang in 1968 - one year only and EXTREMELY rare. It was (under-)rated at 390HP. I believe it was a "W" code and 2 or 3 may have actually been produced before it was removed from the option list in December of 1987. It was NOT available with a 4 speed - only automatics were spec'ed. It was a $622 option
That is right.. The 427 was shown only with the automatic, and I believe that was a special automatic.
My 428 had a C6. but it was a special run of C6. Ford claimed that engine actually put out something over 400 hp, but I think it was specked at 390. Buying that car was one of the mistakes of my life.
I don't know where you live but imagine your idea of cold and my idea of cold differ.
I have never seen a "freeze" plug push out to save the block... This isn't the "job" of the plug anyway... see the post about "core plugs".
Put the truck on a lift... of course everyone has at least one of these available... What part of the original post did we forget? This poor shmuck is working in the dirt like an Arab...
> that show the freeze plugs. I think I could change the front and rear ones > without taking off the manifolds, but I doubt I could get to the middle > ones, especially on a 1990 fuel injected version of the engine unless I > took off the manifolds.>
I either knock them sideways and pull them out and put new ones in. Or I knock them sideways , pull them out and put the expansion type in.
I have seen exactly 3 freeze pugs fail in my 40+ years of automobile ownership. None of the due to freezing, all of them from rotting from the inside out.
If the OP doesn't have access to a safe lift, I hope the OP uses ramps and is very careful to make sure that the vehicle can't come crashing down on top of him. I knew of one mechanic where this happened. The costumer came back to find the mechanic under the collapsed car. Instead of calling for help (the nearest fire station is only blocks away), the mechanic told the lady who owned the car how to lift the car back up with the equipment. It worked - sort of - the car slipped off the jack and killed him dead.
The morals of the story:
1) Always use proper equipment to lift a car.
2) Always make sure that the car is extremely stable before you get under it. Always make sure that you're getting under the car unless there are backup devices (I always made sure that there jackstands in place in case the jack itself failed).
3) If there is an accident, always call in the professionals who know how to remove people from accidents safely, especially when they are just a few minutes away. Better have the professionals do it than have someone die.
But I've had motors over the years that the freeze plugs went with time, with nothing else wrong. I've had two vehicles with 200CID 6's that in both cases the read freeze plug went. In both cases a big screwdriver got the plug out easily, and in went an 'expandable' plug. Problem solved.
If you go back far enough, "full size" cars also got the 240. I think the last "consumer" car usage of the 240 was the 1972 Full Size Ford (Custom; Custom 500; Galaxie 500). I am pretty sure cars never got the 300 six.
The 144, 170, 200, 221 (overseas only), 250 Small six family originated as an engine for the Falcon line of compact cars and Econoline vans. I think it was never used in "full sized Fords" but was common in intermediate and compact models.
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