Flywheel Questions
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Flywheel Questions
Hi, I'm new to this, so bear with me! I just bought an 86 Bronco with a late 70's 302. He was having problems with the starter engaging, so I put one in for the 86, it cranked fine for a while and then started missing. The flywheel is out of an 86, so I think I need a late 70's, but will the same starter still work?
Street Queen to the extr3m3
Joined: Jan 2005
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From: Lubbock, Texas
I would think that if it cranked at all then it should work, and what do you mean by missing? If starter is not engaging the flywheel, you might want to check the teeth on the starter as they could break off, since it happened with 2 different flywheels this would be my suspect.
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It was making all sorts of bad noise like it was'nt engaging, I think that it might be because the late 70's has 50 oz weights and the 86 has 22 oz, so the engine is off balance and causing the started not to engage properly
Hotshot
Joined: May 2004
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From: The hills of No. Calif.
Hi, welcome to the site!
I don't think the imbalance mismatch would cause the starter to not engage, but you do need to get that '86 flywheel off of there as the incorrect imbalance will destroy the engine. And you have the imbalance factor backwards...earlier 302s used 28oz. up about 1981, later 302/5.0s went to 50oz. For what it's worth, all 351w engines used the 28oz. imbalance so don't overlook them as a possible source of a flywheel. I'd also check the casting number and date code on the block to make sure what year engine you have.
Make sure you have the correct tooth count as well, 157 or 164. It has to be matched to the proper bellhousing. If they're mismatched the starter won't engage at all...
Look closely at the teeth on the end of the starter drive, I've seen them get quite worn to where they won't engage properly. Even though the starters are new, you could have a misalignment that's chewing them up quickly. Are the guidepins for the block-to-bellhousing connection still in place, as well as the block plate?
I don't think the imbalance mismatch would cause the starter to not engage, but you do need to get that '86 flywheel off of there as the incorrect imbalance will destroy the engine. And you have the imbalance factor backwards...earlier 302s used 28oz. up about 1981, later 302/5.0s went to 50oz. For what it's worth, all 351w engines used the 28oz. imbalance so don't overlook them as a possible source of a flywheel. I'd also check the casting number and date code on the block to make sure what year engine you have.
Make sure you have the correct tooth count as well, 157 or 164. It has to be matched to the proper bellhousing. If they're mismatched the starter won't engage at all...
Look closely at the teeth on the end of the starter drive, I've seen them get quite worn to where they won't engage properly. Even though the starters are new, you could have a misalignment that's chewing them up quickly. Are the guidepins for the block-to-bellhousing connection still in place, as well as the block plate?
Last edited by TigerDan; Mar 18, 2008 at 09:41 AM.
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I am going to pull the engine this weekend, I have no idea what is still there or missing. The old flywheel that was doing the same thing had flat spots on it, so I really don't know what the deal was with it. I was cranking it for a while to get it started, it is a new battery, but someone told me that it might just not have enough charge to fully engage the bendix. Could this be part of the problem. Thank you very much for your help.
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Flywheel
Okay, so I pulled the engine and put in a 28oz flywheel w/ an 86 starter. worked fine at first, but now it makes all kinds of noise. It sounds like the starter isn't fully engaging the flywheel. And I got the casting numbers off the engine and it turns out it is a 1980 block. Any suggestions?
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Postmaster
Joined: Jun 2005
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hard to say whats going on... do you have good grounds to the block and to the fender from the battery?
Do you have the old flywheel that came with the motor?
How did you come up with 1980?
there are two numbers on the block, the casting number E0?? and the date code 5K12, you need the date code...
I had a E0 block that was 5.0 balance...
check this out...
Guide to Decoding Ford Part Numbers - ClassicMustang.com
Do you have the old flywheel that came with the motor?
How did you come up with 1980?
there are two numbers on the block, the casting number E0?? and the date code 5K12, you need the date code...
I had a E0 block that was 5.0 balance...
check this out...
Guide to Decoding Ford Part Numbers - ClassicMustang.com
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Cargo Master
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From: British Columbia
Starter engagement
Hmmm, I think the starter needs to be carefully checked.
Starter engagement is different on automatic than on standard transmissions, a starter from an automatic will engage too far on a standard. The difference is created by the snout of the starter. If this be your trouble, you can get the proper snout and swap it onto your starter.
But it seems like you have an insufficient depth of starter pinion engagement, but it's still worth double checking.
Or maybe your starter is from a different engine family. Ford does odd things(!) and if you look at a bunch of starters at the drive end you'll see that some have the "window" a little rotated from others.
Starter engagement is different on automatic than on standard transmissions, a starter from an automatic will engage too far on a standard. The difference is created by the snout of the starter. If this be your trouble, you can get the proper snout and swap it onto your starter.
But it seems like you have an insufficient depth of starter pinion engagement, but it's still worth double checking.
Or maybe your starter is from a different engine family. Ford does odd things(!) and if you look at a bunch of starters at the drive end you'll see that some have the "window" a little rotated from others.