rocker ratio?
Turbo Mini Forums

i've got some roller rockers from my old 1.1 engine, does anyone know how to find out what ratio they are? i've attached a pic if it helps.

look the same as my minisport 1.5s

sure someone will be able to tell you how to measure!

measure from the centre of the pivot point to the centre of the roller and from the centre of the pivot point to the centre of the 'ball' that sits in the pushrod

if one measurement is 1.5 times the other then they are 1.5 ratio :)

Edited by slater on 27th Feb, 2009.

Dumb question time..

Can you get away with replacing the rockers without replacing the head gasket.. and all the crap that goes with that..

Terry

website:- http://www.terryhunt.co.uk

ive heard that people have managed to do it.. but when i tried... i ended up replacing the gasket an hour after starting it

They look like Minisport 1.5's . At least they look identical to the one's I had.

I have got away with changing the rockers and not the gasket, but it's not always successful.

In the 13's at last!.. Just

cheers guys, measured 2.2 one side and 3.3 the other. looks like its a 1.5.

Tel, from what i've heard and read its a 50/50 gamble. personaly, i wouldnt take the chance and just replace it with an upgraded gasket

I,ve ALWAYS got away with it.I drain the water,ease the pressure on all the head bolts and then replace the rockers,re -torquing afterwards.Mind you, I have yet to try it on a turbocharged engine !.

Has anyone managed to take the studs out and slip the new gasket in that way?? All I am trying to do is avoid messing with the manifolds and turbo connections..

I would probably not take the risk of not replacing the gasket, but I'm just working out weather I want to do all that work just for the roller tips.. They seem much more attractive now that the exchange rate has dropped...

website:- http://www.terryhunt.co.uk

it is technicaly possible, but its going to be incredibly difficult to remove all the old gasket from the head and block.

It would only take a couple of hours to take the head off properly, probably quicker than it would take to try and do it the other way.

A couple of hours??

You obviously have not seen my engine bay!! No, as said I would not risk the gasket so the roller tip rockers can wait..

Terry

website:- http://www.terryhunt.co.uk

as others have said, i have changed the rockers and not the gasket but did drain the water and slacken all the head nut slightly, worked fine.

also when changing the gasket i undo the manifolds from the head and leave them in place, then remove the head studs and pull the head forward and off. when refitting i have 2 very short studs i screw in place, slip the gasket over, slide the head back, put all but 2 studs back and then remove the short studs with a screw driver (i cut slots in the short studs) and pull them out with a magnet on a stick.

Turbo shed, you sound like my kind of guy!

Edited by Turbo Tel on 1st Mar, 2009.

website:- http://www.terryhunt.co.uk