Just bought a second hand AC fuel pump for Vitesse. The thread that hold the top cover bolt/screw into the top alloy body are pretty non existent for about the first 5mm. There looks to be about 4mm of good thread below that.
I thought of using a longer bolt/Screw to pick up on the deeper, ok thread.
So a few questions please
Remove the trace/damaged thread with a small dremel grinding bit and the bolt/screw will pick up into the good thread?.
Run a tap down that will pick up into the good thead? (not much experience of taps/dyes).
Also, anyone know what size tap and bolt/screw I will need for that pump (later Vitesse Mk1 2 Litre).
Any bolt should engage with at least 1.5 the bolt diameter's worth of thread. Especially in alloy, which should be a coarse thread. Is there enough 'meat' in the body to drill and tap for a larger size of bolt?
Serial Vitesse racer.
Old Blue. 1995-2001 Silverback. 2001-2007 SofS. 2007 - to date.
if there are threads left at the bottom? take the pump to fasteners merchant. ask for a bolt to fit it much longer than the old one. and get a nut to fit. screw bolt in till it bottoms, cut off head of bolt then use the nut and a washer to tighten down this has worked many times on various things. cheers
Will try a longer bolt, as is only low torque to seal the rubber gasket I assume?.
cutting the head off the bolt and using a nut saves trying to find an exact size that could strip the few remaining threads. very low torque, just use a spring or star washer when fitting plus the flat washer underneath job should be sorted then
Its 1/4"unf just had to this on a leaky stripped pump, there is a good depth to the casting hole, , this one needed tapping to get some reclaimed thread ,lower down the drilling
The idea of stud and nut is a good call the nut thread may need some sealer
1964 1600 Vitesse 6 Cactus and Black , now sold now have T2000 Mk2 saloon in French Blue/grey trim been restored without running since 1997 now has power steering ,poly bushed and Alfa 156 seats location Luton
there is some old oil/dry gunge in the chamber on the bottom half of F/P under the diaphragm, so removed diaphragm with it's stalk according to Haynes manual. This has damaged the 2 fibre washers under the cup a bit, which I assume prevent engine oil entering this chamber.
No repair kits show these washers (also the diaphragm and valves seem good, so was hoping not to buy anyway) .
Any ideas as an alternative to these washers?
How can I get the that wider flat end of spindle back through those washers safely anyway?.
Would a bit of oil splash back (as most of washers is there) into chamber be the end of the world anyway?.