mk7 2.2 . broke m10 fuel pump sprocket bolt

[marc1234567]

it's a left hand thread and I'm stupid so I broke it.

the sprocket doesn't come out. is there a thread in the sprocket or can I pull the sprocket?

[knobby1]

it's a left hand thread and I'm stupid so I broke it.

the sprocket doesn't come out. is there a thread in the sprocket or can I pull the sprocket?

Does the sprocket not have a big nut/bolt in the middle which drives the fuel pump..??

11-16-FORD-TRANSIT-M7-MK8-22-RWD-EURO-5-RECONDITIONED-RECON-REBUILT-ENGINE-114653076160-6.jpg

Lord Knobrot

[marc1234567]

it's a left hand thread and I'm stupid so I broke it.

the sprocket doesn't come out. is there a thread in the sprocket or can I pull the sprocket?

Does the sprocket not have a big nut/bolt in the middle which drives the fuel pump..??

11-16-FORD-TRANSIT-M7-MK8-22-RWD-EURO-5-RECONDITIONED-RECON-REBUILT-ENGINE-114653076160-6.jpg

Lord Knobrot

yes. just like photo. that bolt is left hand thread but I didn't realise ( despite being very tough to move)

I can't seem to post images. The bolt head has gone ( twisted / sheared) . the sprocket does not pull out, the thread is visible inside sprocket and I was wondering if there is a thread in that socket that would be preventing it pulling off. in haynes it mentions needing a remover tool to get fuel pump off the sprocket. 4A/12/ 10 " the sprocket is tapered fit on shaft....tools 303-249 and 303-249-01".


There's nothing about removing the sprocket it only says in 4A/ 12 /8 "undo the fuel sprocketretaining bolt. Note The retaining bolt has a left hand thread" as part of fuel pump removal procedure. I didn't notice this I've been following diagrams from ford and there is simply a picture with the bolts coloured purple indicating removal.


As the removal of pump requires a pulling tool presumably this applies to removing sprocket needing puller. I'm not sure about if there is a thread in the sprocket somehow . probably unlikely I guess, if haynes says it's tapered that would explain why not able to easily pull off I guess.

[marc1234567]

just saw a sprocket and there's no thread on the sprocket. just tapered.

[knobby1]

just saw a sprocket and there's no thread on the sprocket. just tapered.

Yeah...they usually need a puller to remove the sprocket, that's what the two holes in the sprocket are for.....Don't like you chances of getting the remains of the old bolt out of the pump drive shaft either.

Puller is something like this..::

151605253_max.jpg

Lord Knobrot

[marc1234567]

just saw a sprocket and there's no thread on the sprocket. just tapered.

Yeah...they usually need a puller to remove the sprocket, that's what the two holes in the sprocket are for.....Don't like you chances of getting the remains of the old bolt out of the pump drive shaft either.

Puller is something like this..::

151605253_max.jpg

Lord Knobrot

I was thinking about that. the general idea was that if I pulled the sprocket there's probably be something to try and grab with mole grips but holding the fuel pump shat steady , not sure how would do that. either with the sprocket on or off the likely course would be to drill 5mm cobalt drill then try to screw in a m5 10.9 grade machine screw. obviously it likely is in there tight unless having the head sheared off releases some of the tension.

if that didn't work putting a left hand thread helicoil or tap a left hand thread.

I suspect keeping the sprocket in place while I attempt these actions is probably best way . do you know if the would be a way stop the pump shaft turning without sprocket there?

[knobby1]

I suspect keeping the sprocket in place while I attempt these actions is probably best way . do you know if the would be a way stop the pump shaft turning without sprocket there?

Not that I'm aware of....not had this sort of issue. Leave the sprocket & chain on maybe....failing that, you might have to remove the pump and hold it in a vice...but still leaves the problem of how to hold/stop the shaft from turning.

Lord Knobrot

[marc1234567]

I suspect keeping the sprocket in place while I attempt these actions is probably best way . do you know if the would be a way stop the pump shaft turning without sprocket there?

Not that I'm aware of....not had this sort of issue. Leave the sprocket & chain on maybe....failing that, you might have to remove the pump and hold it in a vice...but still leaves the problem of how to hold/stop the shaft from turning.

Lord Knobrot

Thanks Knobby things to think about . another lesson learned hopefully. I broke camshaft sprocket bolt when I did mk6, never broke a left handed by turning wrong way before . I think I may make something to fit in the 2 fuel pump sprocket slots that can be securedin a vice situated below the sprocket, then try filling the bolt. I did angle grind chain off, do you think a bit of chain around crankshaft sprocket will secure fuel pump sprocket?

[metalworker0]

There are stud removers that work both ways, clockwise and anti clockwise .
if nothing works ..last ditch attempt would be you welding a nut onto it , once you remove the pulley ..me thinks.

probably end up burning the seal though .

all the best.mark

[marc1234567]

There are stud removers that work both ways, clockwise and anti clockwise .
if nothing works ..last ditch attempt would be you welding a nut onto it , once you remove the pulley ..me thinks.

probably end up burning the seal though .

all the best.mark

Thanks for the input

interesting you say there are stud removers that work both ways
I assumed there should be but all the ones I found referenced left hand thread only in the sense that they were left hand threaded in order that they turn opposite direction and remove normal threaded bolt. what would I lol for as a description? when you say seal, is that one that's easily replaced?

[metalworker0]

yes it is easily replaced ...but welding is last ditch ..may effect something further inside.

when you are looking for a stud extractor ..look at the knurling ...some have it facing one way .

first one one snap on..i sold on ebay a couple of years ago ..its bi-directional ..note knurling is facing one way and the other - see pic in next post

second one britool

last picture is of a king dick one i sold ..different type of knurling ..but works in either direction

[metalworker0]

showing snap on one taken apart ..with two directional barbs

[knobby1]

showing snap on one taken apart ..with two directional barbs

These only work if there is enough of the bolt remaining to use, not much good if snapped off flush.

Lord Knobrot

[Jim Archer]

Unless there was threadlocking compound used, that bolt will likely just spin out if you can get purchase on it. The bolt was just there to hold the tapers together whilst heat and vibration do their best to loosen the fit. Did it have a Belville (dished) washer?

As you are taking the pump off, it's likely easier to do on the bench. Just lightly tap the sprocket back on the surgically clean tapers.

Jim

[marc1234567]

Unless there was threadlocking compound used, that bolt will likely just spin out if you can get purchase on it. The bolt was just there to hold the tapers together whilst heat and vibration do their best to loosen the fit. Did it have a Belville (dished) washer?

As you are taking the pump off, it's likely easier to do on the bench. Just lightly tap the sprocket back on the surgically clean tapers.

Jim

I left the broken bolt somewhere and replacement is here [url[/url]=https://ibb.co/R0jH8cB]



here is sprocket and the new one.





someone said I think that most of thread may be in the fuel pump and purchase may not be easy so to speak.