Toronado.org

To all the Toronado engine afficionados . I owe to all of you who helped and gave advices an update. We installed everything back together, using adjustable pushrod to calculate correct length for each pushrod and made the necessary adaptation (in the range of 0,004 to 0,01’’ of height decrease) ......

Dear Bruce, after exchanging with engineers and experienced motor rebuilders , we concluded the best way to restore initial valve train geometry to take into account the significant alteration due to block surfacing, head surfacing and finally modern gasket additional height ,WITHOUT changing the va...

We just received the Mondello tool ... so we now can begin to set up the valves at the correct height and control also springs position vs. valve stem top ... what worries us a bit is that as we surfaced both the heads and the engine block , this will have an impact ... probably not compensated enou...

To the 425 Team ... without waiting the Mondello valve stem height gauge I have ordered , is someone able to give me the dimensions of that gauge ( original tool was BT-6428) ?

Otto, I am with you , but as the engine needed a complete rebuilding .. it was quite a small operation at that time ... by the way talking to Mondello yesterday evening over the phone they told me they have now in stock "brilliant" SS exhaust valves which are good for service under new gas...

Hello to the 425 Engine Team ! ... we just spent a few hours on the engine ... and found the culprit ! .... during rebuilding process , we installed hardened exhaust valve seats for lead free gasoline ... and for a reason my reason , and my old rebuilder’s one too , ignore ... they forgot to adjust ...

Roland, it is exactly what we have decided to do ... clean carefully the old set of lifters and put them in the engine. This will be done on coming Tuesday. We checked them and the hardened bottom of all of them and it seems they are in quite good shape, showing only minimal wear .. we will see Mart...

Hi Otto, it is our first conclusion too ... despite we are a bit confused by the low oil pressure when hot ... we are going to use the old set of lifters , as a test , as the engine enjoyed a silent valve train before rebuilt. Will keep you posted .

Dear Bruce, Roland and Otto , first thanks for your insights ... I think I may face a serious issue ... let me share details and sequence with you to have your point view. My engine just got out from restoration , with forged Mondello pistons , new camshaft, new lifters , new rockers , new valves , ...

Thanks Roland ! May I ask you which type of oil and viscosity are you using ? And which oil pump have you put on your rebuilt engine ? I am quite impressed by your values ...