Previa Technical chat

[cods68]

hi all ive had a oil leak for past few weeks ... finally got round to having a look , looks like to of my rocker cover bolts have sheared off  ... anyone know best place to get new ones ? thats if i can get old ones out ggrr ... hopefully be getting stuck into it this wknd ... and does anyone know what will seal it if they wont come out both bolts are at the bottom ..... bet i over tightened them when i but them back on .... torque settings seamed very low so just gently tightened them torque wrench didnt go that low  :.... if anyone got a few spare ones ill be happy to pay many thanks Neil

[cods68]

ps might be good if i said what car it is lol its a 95 previa gl petrol 

[Kernowman]

Only thing you can do is use a stud remover...failing that drill them out carefully.
Use progressive size drill bits starting with 2 or 3mm and working up.
You might be able to use tapered stud/bolt remover to pull out without damaging threads.
If you do damage them then try drill out a clean hole a size bigger and re-taping a new thread in and use new bolts a size bigger.
Most garages use heli-coil to repair, but haven't seen the kit for ages anywhere.

Here's a few tools that might help..

Bolt/stud remover on ebay

socket type remover

stud remover

You can get new bolts from most good hardware stores or fixing wholesalers like    F.W.B.

[cods68]

cool thanks for imput ill hopefully get rocker cover off tomorrow and see best tool to use ..... and there a screw fix place near me ill check them out for bolts proberly change the whole set .... they seam weak to me lol

[Steveiboy]

Scrapyard just get another rocker cover save all the hassle,

[ADarbon]

When i sheared mine I found with the rocker off there was enough thread showing to get a pair of grips at them. don't talk them thats all that i can say and tight then a quart turn is what i do.

[cods68]

least it not just me that sheared them lol ..... thats what i hoping for get grips on them lol . fingers crossed tonight they be out if so  dont fancy drill them out because they had to be bottom bolts the most arkward  ...... did you manage to find toturial on window tinting if i manage to get this sorted thats nxt thing on my list ... many thanks Neil

[ADarbon]

I had a torque wrench that did the setting but i can only assume it's ok if the bolts are New. worst thing was it was the very last one that snapped, did i curse. The file was too big to post on the site for the tinting I send it to your email address that's on your personal info

[cods68]

well bolts out with a pair of grips new bolts in ..... gently tightened fingers crossed all sweet now  hopefully be a sweeter smell when driving now and not oil on manifold 

[ADarbon]

good job mate. as long as you cleaned the gasket and the surface good it should be fine.

[cods68]

yeah went smoothly found a few bolts in shed ... cleaned all gasket and surfaces .... gettin some new bolts just in case lol .... but if its sealed prob leave it for now lol .... best thing i found about these buses that if it rains like last night u just shut the door ... and carry on .... when i finally got bk in the house mrs imforms brakes been squealing  ... so much for wknd off and fishing  .... was hoping to get to the meet this year in bristol but it says its 3 aug iam away ggrrr  

[ADarbon]

could be the low pad warning its a high tech bit of metal that scrapes the disc that or seizing calliper for temporary grease the sliders and pump the piston out and push back in with a g-clamp a couple of times. there's a full tutorial for them if needed