Forum:
hi guys,
ok, got a funny one. my pwoer steering pump seems to have lost a bolt. its the bolt that fixes to the side of the engine, on the longer bracket part of the pump. not a huge problem, but there is movement in the pump now.any idea where i can get a new botl from, or what size the bolt is?
hope you can help, cheers!
weak bolts
This must be common, I have an F73 with the bolt on the bottom of the PS pump missing, I think maybe it has sheered off at the block. Has your bolt fallen out or broken off? I will be trying to fix it this weekend as my ps pump is no longer in line with the crankshaft pulley from running without the bolt. I think this has caused it to fail as now when I am decelerating my power steering stops working.
This post says the bolt is an M9 1.0 -
http://www.daihatsu-drivers.co.uk/node/4412
thanks fo rthis, typical, my
thanks fo rthis, typical, my problem with my Mazda V6 is bolts! it looks liek i am missing two bolts, the side one (has coe out i think) and one at teh front, also has come out.
Sounds like a common problem
My has sheared off some time ago ... tightened up the other bolts .. does run a little out of alignment }:)
Would be interested to hear how you go in getting a sheared bolt out "pdaly"
Stuart
right, what a pain, i think
right, what a pain, i think i have 2 bolts missing, one front and one side. i cant see yet if its sheared off but will have a proper look this weekend. if it has sheared off i will be well annoyed because i have just spent 3 weeks trying to fix two bolts on my V6 engine.
i hope its just the bolts have vibrated loose and dropped out, but its finding new ones that fit, does any one know what the sizes are, perhaps the length off the top of their head?
Removal
To remove the sheared bolt means removing the entire pump and bracket, mark the centre of the sheared portion and centre pop accurately, drill through slowly with a small drill bit, progressing to larger drill bits.
When most of the bolt centre is drilled out, use a small chisel and tap from one side of the bit of the bolt left, into the centre, this will fold the bolt back into itself and eventually come free. The core, once removed, will leave only the threads and a very thin section of core, this will easily fold in the same manner as sheet sheel.
Bolted
Two types of mounting were used, these both pivot on the top bolt, my usual remedy is to make a pin on the lathe, this passes right through the bracketry, and is threaded on the front.
This actually contributes very little to the holding of the pump in position, it merely acts as a pivot, bearing this in mind, i thread the pin at the front.
Fit a Nyloc nut to this and cut off most of the remaining thread, captivate this nut by drilling a small hole in front of the nut and fit a selock or split pin. Even if the nut then comes loose, the pin will stop the nut from dropping off, thus keeping the pin in position and the belt in alignment. Turning the back flange oversize means a flat can be put onto it, this captivates the pin to prevent it turning when the nut is tightened or untightened.
crikey, ok i will give it a
crikey, ok i will give it a bash, i ahve some new bolts now, just need some nylock nuts to fit, will let you guys know how i get on, thanks for the tips
Bolt Types
Due to their location the bolts are prone to heating from engine heat, and rapid cooling from water splashing them, this causes internal fractures. Results of these internal fractures are that engine vibrations and the pumps high tension conspire to worsen the situation, until something gives, usually the bolt itself.
Wnen replacing these bolts, do not use a standard black bolt, use a bolt with a minimum 8.8 grade, these are considerably stronger, and far less susceptible to breaking. Replacing these at around 100,000 miles on a local farmers Fourtrak, it has now covered in excess of 600,000 miles, these bolts have not broken, they will rust through first.
Industrial suppliers will understand if you ask for the bolt sizes you require in grade 8.8, and supply them accordingly.
Quick follow up question on this
Fixed my bolts, the bolt that goes into the side of the engine was an M8 1.25 I think someone had tapped it out before me though. Drilled and tapped the sheared bolt at the front and bolted the new PS pump on. Problem: the pump is 20mm too far forward to line up with the crankshaft pulley. I noticed the new pulley has a larger offset than the old one which I had to cut to take off the pump bolt:-(