Engine Differences
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New User
Joined: Sep 2005
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Engine Differences
My Bronco has started using some of oil, and since I am painting it I figured now would be as good a time as any to rebuild the engine. It is a stock 5.0 with almost 270K on the clock. I was looking around on e-bay and saw that they offered an engine kit for the 89-90, and on autozone.com the part numbers for 88 and 90 are different, well the number aren't but the suffix at the end is different the 88 is an (A) and the 90 is a (C). So what is the difference, can I use the 89 kit? I know the parts interchangeability for chevys, but Fords are not my spciality. Also do i have a roller motor? Thanks.
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
you dont buy a kit till you take the motor out and have a machine shop check it out. this way you get the proper bearings,rings and pistons in the event stuff needs worked over a bit. now is a good time for a 5.8 swap as well.
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New User
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The way it is burning oil i know it needs some rings, and valve seals. While the heads were at the machine shop, I was going to have the block checked and the crank turned if there was any scarring. as far as a 351 goes the 302 plenty for what I need. It'll pull the 35's in 4 low plenty good.
Lead Driver
Joined: Sep 2002
Posts: 9,182
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From: Gateway to the West
And I was about to recommend going the opposite direction and suggest the 300. Same if not better fuel MPG and more power in the bottom end. We all have different outlooks on this subject though. I agree with Kem though on the points about waiting on the kit til you know what kind of size changes may be necessary when the old components are cleaned up and trued.
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
I love the 300-6 and honestly thats the route i will end up going on my wheeler that i am building due to its stoutness and low end grunt. I just wasnt sure what you used the vehicle for and throwing out options. thats the best part of our rigs is we can go either direction motor wise farely easy.
keep us posted
keep us posted
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
Swapping from a 302 to a 351 is basically plug and play. Going to a 300 is a bit more work, but either motor is a big step above a 302 in my book.
Regardless, don't buy ANY parts you think you might need for a rebuild until you pull the motor and have it checked by a competent machine shop. Otherwise you may end up buying expensive parts you don't need.
Regardless, don't buy ANY parts you think you might need for a rebuild until you pull the motor and have it checked by a competent machine shop. Otherwise you may end up buying expensive parts you don't need.
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