Flywheel bolts retap??

[Micro Mudder]

When I failed to use lock tight on the fly wheel bolts they backed out while driving and made a huggggee mess so now most of the threads on the crank shaft are ether kinda stripped or screwed up whats the next bolt size up I can retap them to the are 12mm by 1.25 thread pitch I beleave could I just go to 1/2" bolts and just tap right down with out drilling since it's between 12mm and 13mm?

From experience whats the easiest way of fixing this quick? I got red lock tight not recommended but I want to over do it

[bravekozak]

You are supposed to use Locktite on the flywheel bolts?

[Micro Mudder]

Yea blue lock tight is recommended I was told its in the festiva bible (Hanes manual) but any thang that important it's kinda helpful to have little more protection

[zoom zoom]

You going to take the crank out of the block to drill and tap it or just let the metal shavings go in the oil pan?

I don't think the flywheel bolts are a common size thread, they're super fine pitch, but yea i suppose if you have to, moving up to a 1/2" would be the next smallest step up. You'll be forced to use the standard fine thread pitch, I haven't seen a standard size bolt with metric threads...might work tho? Keep us posted!

[Micro Mudder]

I'll do it my self cuz I am going to change the oil any ways but I'll put a magnet on the out side as I retap it to keep as much out of the oil as possible and I'll see what my local ford dealership has in stock for 1/2" fly wheel bolts so I know what thread to retap it with but I guess if it works it could help y'all out if you ever needed to do this haha

But I may end up just using grade 8 bolts as a last resort since my car still has the stock tranny and that will go before the bolts do I'm hooding but I'll let you guys know tomorrow what I end up doing thanks for the info!

[tooldude]

Check with a local engine rebuilder and see if this is even recommended (I'm thinking not) because this gets into all kinds of issues. Those metal chips will reek havok on the oil pump, and if any bypass the oil filter, also crank & bearings. A low quality tap may break in the crank and there may not be enough metal there for strength or space anyway. If the bolts are not too loose in the full thread length, it may be possible to clean up the threads with a thread chaser (not a tap which removes too much damaged thread), but it may have to enter from the internal side because of damage to the threads. I can't recall the size of the pressure plate bolts, but here are some dimensions if you need them: [6mm=.23622In] [8mm=.31496In] [10mm=.39370In] [12mm=.47244In] [14mm=.55118In] [16mm=.62992In] - [5/16"=.312500"=7.9375mm] [3/8"=.37500"=9.5250mm] [7/16"=.437500"=11.1125mm] [1/2'=.5"=12.700mm] [9/16"=.562500"=14.2875mm] [5/8"=.62500"=15.8750mm] and they're much easier to follow if you list them like a chart.

[Rocketman]

I don't think the crank bolts go all the way through the crank, how would shavings get into the oil? Or do they?

Either way, it's really not something I would attempt in-car. The flywheels center on the crank hub, they don't rely on the bolts for alignment, but I really wouldn't chance it.

Probably would want to go up one size in metric rather than SAE, so you can have correct thread depth

[zoom zoom]

Take the flywheel off and tip the motor sideways and oil will pour out the holes!!

[shadetree]

Take the flywheel off and tip the motor sideways and oil will pour out the holes!!

True dat^. Or use Manuel flywheel bolts on an auto flex , and lock the crank lol

[rmoltis]

.

hey i noticed in your signature that you have a 1 ton "wench"....
have you tried putting her on a diet yet? :p

[Micro Mudder]

Hey thanks guys for the heads up ill defiantly try your ideas before mine cuz I'm just shooting in the dark! I hope it won't end up being a week long project..

It's an ATV wench and No I haven't put it on a diet it's gotten a fue hundred lbs fatter I'll weigh it when I get it on the road again.. I been looking at a 12ton one at the cheep tool store I forgot the name.. But it's like $300

[rmoltis]

Hey thanks guys for the heads up ill defiantly try your ideas before mine cuz I'm just shooting in the dark! I hope it won't end up being a week long project..

It's an ATV wench and No I haven't put it on a diet it's gotten a fue hundred lbs fatter I'll weigh it when I get it on the road again.. I been looking at a 12ton one at the cheep tool store I forgot the name.. But it's like $300

the definition of wench is from old times "a young girl or woman".
so when i saw 1 ton wench i thought it may be your woman .
just playing of course.

what you have on your vehicle is a "Winch"

your vehicle weighs under a ton already.
I bet what you have works great for your application.

[Micro Mudder]

Haha I never knew that I guess it would help if I spelled correctly but it works okay it weighs a lot more when caked in mud

I retaped the crankshaft with a fine thread 1/2 and it works perfict so far I got them all torqued down with red lock tight just cleaning stuff up now to get it dropped back in my festy to hear her purr again

[rmoltis]

nice, hope it all goes smoothly

[tooldude]

That's great that worked out for you. I would have to be "hands on" to try to judge whether something like that would work out. It's good to know what can be done to these cars. Were the threads had to cut?