36 replies to this topic

[carbon]

I don't think all A+ 998 engines had press-fit rods, change from fully floating to press-fit was late 80's?

 

Others may be able to confirm.

[sledgehammer]

I don't think all A+ 998 engines had press-fit rods, change from fully floating to press-fit was late 80's?

 

Others may be able to confirm.

probably right as they did like to overlap specs for a while

 

& engine I just done is a 1989 998 with press fit

[cal844]

 

DONT use jonspeed!! Very bad reviews

Care to elaborate? Where can I read these?

 

 

 

I know this link birtngs up cylinder heads, but its the easier parts to do on an engine...

 

http://www.theminifo...ed#entry3168239

[Dan]

Or heat the small end evenly and slowly until it goes blue or burns off carbon deposits and the pin should slide striaght in, hold the pin and piston steady and swing the rod until it grips the pin then keep swinging the rod for about 15 seconds and make sure it's still nice and free in the piston once it's fully cooled and work lots of oil into the relief in the skirt for the pin for initial start up lubrication

 

 

  Heat shrinking the pins into the rods makes it very hard to test the fit as you do it.  There is no way to test the force required to break the joint if it just drops in.  As said above with a press you can monitor the load on the pin as it slides in and look for any free spots.  The Rover way to change them is with a threaded press tool using a torque wrench to deliver at least a specific minimum load to the pin as it slips through.  

 

  Mini Spares used to have teflon buttons in the catalogue, they seem to have disappeared.  Presumably due to the difference in the available pin diameters as said above.

Edited by Dan, 20 December 2014 - 01:33 PM.

[ACDodd]

Measurent is how you check the fit.

Ac

[Dan]

Very true but really requires an internal bore micrometer to measure the rod accurately.

[ACDodd]

Dial bore gauge is even better for inexperienced users. No one said you can't do it, but you need to have the right tools to do it properly.

Ac