Im curious about something. I recently swapped out my my 200I6 for 250I6 and I have trouble with my breather hitting the hood. My carb isnt correct, but it was on the engine before and it IS shorter than my old 200 carb. Also, the fan blades are within a sixteenth of an inch away from the top of my factory shroud. I read a couple old threads yesterday about the 250 being taller and WIDER. I didnt think it was wider, but if it is, then maybe that is my problem. The motor mounts have the same part number, so Im good there. I used engine stands from the 71 shell that supposedly had a 250 in it. With all the minor differences in parts between the 200 and 250, I was wondering if there might be a difference in the engjne stands. They look the same, but I learned that looks dont always tell the story. Is it possible that I have 200 engine stands installed causing my motor to sit a se bit too high?
Master Parts Catalog says a different part number for the "engjne" stands. The 70-72 is a D0DZ and the 73-77 is D5DZ. Also shows a D3DZ for the 73-77. This doesn't mean that the part is different...just a different number. The bracket is different on a 250 than the 170-200 bracket, part number 6030 and 6031, in this pic http://www.1bad6t.com/Maverick/repair/diagrams/untitled027.gif
Craig, I should have mentioned Im using the shroud and fan from a 250 a/c car. Jeff, I better check what I have on the car. The part the bolts thru the frame I believe are the same for both engines. The part that bolts to the block might be my old 200 ones. This might also explain why I felt I had too much yoke sticking out of the trans. Thanks
I've had a '74 250, '71 200 and '80 200 in my '72 all using the exact same frame and engine mounts ('74 250 engine mounts with the car's original '72 200 frame mounts). Haven't had any issue. What carb are you running? If it's one of the larger YF's off a "big block" I6, they are taller car than the car version. I put a Carter YF off a 300 I6 on my 250 once and couldn't get the hood closed with the air cleaner on. For that matter, I think all Carter YF's might be taller than the RBS. I always ran a Carter RBS on it when I had the 250 in it.
Comet Fever, that is the part I think is wrong, thanks. Jamie, I have a Carter YF on it, but the bottom section is about an inch shorter than the YF that was on my 200. I dont have an RBS to compare it too, but I dont think it will be much shorter. My breather is about a half off my valve cover.
One last thing......there are tear drop shaped holes in the engine stand, The motor mount bolts are not at the bottom of those holes, they are about midway. Another reason I think something is wrong.
The 250 is definitely wider than the 200. I found out the hard way back in the early 90's when I tried to bolt a 200 into my car that came with a 250. Comet Fever is correct, and THAT's exactly what happened to me.
Thanks for confirming that guys. Its funny how things roll around in your head for a while and then all of a sudden a light bulb goes off. I had a chance to go in the garage this morning and look around for the old mounts that goes on to the block. I found them and started comparing them to what was on the car. it was a little dark in there and hard to see but when I looked at what I had in my hand, they were two different sizes.Looks like I have 2 different sizes installed on the car right now.
Yup, had the wrong part on the right side. Swapped it out and it caused my fan to hit the shroud. Its because ybe upper radiator hose is not in the correct location. Im ordering a new one. Really appreciatd the knowledge around here!
The 200s had an R stamped on them, the 250s I had were blank. That might be where things went wrong for me. I thought the R was right and the blank was left.
Well, either way, it wasn't "right"... Glad you got it sorted out! Good old Ford engineering at it's best.
What's the actual difference in size? I have the stands for a 200 and I'm putting in a 250. Where can I get the ones for a 250?
