Question about 5.0 Roller and Non-Roller motors
10-09-2006, 06:28 PM
#1
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Question about 5.0 Roller and Non-Roller motors
Well, I bought a newly rebuilt 91' F150 5.0 motor punched out to a 306 to replace my 94' GT 5.0 that blew a rod out the pan. I didn't relize these weren't roller motors. The purschase included only the rebuilt shortblock, heads, and cam. I already figured I was going to put my original intake and accessories on it. I have two questions.... will this non-roller engine work in my car once I put the rest of it together? MORE IMPORTANTLY... what do I need to do to make this a roller??? Do I just put my original cam and heads on the new shortblock?? PLEASE HELP!!!
10-09-2006, 07:19 PM
#2
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RE: Question about 5.0 Roller and Non-Roller motors
Are you sure it's not a roller block? Just because it doesn't have a roller cam in it doesn't mean it's not a roller block. The block I have in my car came out of a F-150 and it's a roller block. The truck didn't have a hydraulic roller cam in it but it was a roller block.
10-09-2006, 07:49 PM
#3
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RE: Question about 5.0 Roller and Non-Roller motors
The block itself may be a roller... but the cam and heads aren't. If I put my original cam and heads on the new block.. will it work?
10-09-2006, 07:52 PM
#4
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RE: Question about 5.0 Roller and Non-Roller motors
I have a 91 truck 5.0 and it does have a roller cam. Earlier trucks had flat tappet cams.
Swap your cam and stuff into it. If its' not a roller block you have been screwed, take it back.
Swap your cam and stuff into it. If its' not a roller block you have been screwed, take it back.
10-09-2006, 08:06 PM
#5
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RE: Question about 5.0 Roller and Non-Roller motors
Get the number off of it.
Anyways, you can run flat tappet cam in roller blocks with no problem...you just cant do it the other way around (roller in a none roller block) without a small base circle cam and a conversion kit.
If its a 91 motor, it should be a roller block. All 302's after 1985 i believe are roller motors. No exceptions. The 351's however...check and make sure you didnt get a 351.....didnt begine to be roller blocks until 1994.
Anyways, you can run flat tappet cam in roller blocks with no problem...you just cant do it the other way around (roller in a none roller block) without a small base circle cam and a conversion kit.
If its a 91 motor, it should be a roller block. All 302's after 1985 i believe are roller motors. No exceptions. The 351's however...check and make sure you didnt get a 351.....didnt begine to be roller blocks until 1994.
10-09-2006, 08:38 PM
#6
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RE: Question about 5.0 Roller and Non-Roller motors
Here's the web address of the engine I bought... let me know what you can tell. Thanks
http://cgi.ebay.com/ebaymotors/ws/eB...MEWA%3AIT&rd=1
http://cgi.ebay.com/ebaymotors/ws/eB...MEWA%3AIT&rd=1
10-09-2006, 09:02 PM
#7
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RE: Question about 5.0 Roller and Non-Roller motors
As far as i can tell, thats a 302. Maybe he just rebuilt it with a flat tappet cam in it. Who knows, they'res not really that much much strang about doing that. People have done it.
10-10-2006, 12:27 PM
#8
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RE: Question about 5.0 Roller and Non-Roller motors
Yeh it's a 302, and you can see the bolt holes for the missing spider plate, indicating a roller block.
It would be hard to gripe about not getting what you expected when such a photo was posted in advance.
I would not expect that flat truck cam to work too well with a 94 GT PCM.
You need your original cam. Don't know what to say about the valve springs?
It would be hard to gripe about not getting what you expected when such a photo was posted in advance.
I would not expect that flat truck cam to work too well with a 94 GT PCM.
You need your original cam. Don't know what to say about the valve springs?
10-10-2006, 01:45 PM
#10
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RE: Question about 5.0 Roller and Non-Roller motors
I wouldn't do that, for nothing else than a loss in horsepower. The flat tappet cam has more friction than a roller and it's going to be milder than your HO cam. When your engine came unglued if it didn't hurt the cam I would just move it and all the supporting items over to the new engine. Now would be a great time to slip something else in there. Also I would put new valve springs on those heads. Those heads should be the same as what is on your car. Somewhere on those heads, I'm not sure of the exact place, it should say E7TE.