Thread: 2a engine into 1955 s1

Very common mod.

You will need the bellhousing from a SII or SIIa suffix A box with the 2 1/4 bellhousing. Or just use the gearbox from any 2 1/4 (not SIII) externally they use the same mounts and will connect to your clutch shaft.

You will need the radiator from a 2 1/4 or have the bottom pipe swapped over.

You will also likely need to get the accelerator cross shaft and mechanism from a SII or SIIa to connect the carby which is on the other side of the engine.

You can use oil bath air filter, inlet hose and elbow from the 2 1/4 which has a larger bore but the elbow may hit the under side of the bonnet.

If your 55 is a 107 or 86 you may find the front axle housing will hit the sump.

Originally Posted by Lotz-A-Landies

Very common mod.






If your 55 is a 107 or 86 you may find the front axle housing will hit the sump.

And that's the reason they extended the wheelbase by 2" to 88 and 109 on later models. .W.

Thanks for the info Diana , this is going to be my next project as well.

Might just buy 44 gallon drum of oil and keep driving it lol
Might be an idea to find someone who can hone the cylinders and re ring it.... Get the valves lapped and hope for the best..

Originally Posted by Lotz-A-Landies

----- If your 55 is a 107 or 86 you may find the front axle housing will hit the sump.

You can lift the engine away from the axle housing a bit by using a pair of rubber engine mounts from a Toyota FJ40, but watch the underneath of the bonnet, this in turn can be lifted a bit by adding spacers under the radiator support panel and straightening out the bonnet hinges a bit as well.
.

Originally Posted by mfc

Might just buy 44 gallon drum of oil and keep driving it lol
Might be an idea to find someone who can hone the cylinders and re ring it.... Get the valves lapped and hope for the best..

Make sure the inlet valve stem seals are replaced first, as these seals are a common source of oil usage problems.
.

I've done the seals and lapped in new valves...... I didn't think before but it could be the valve stem guided.... ( do they have them on the exhaust valves )... Anyhow I've got a set for I'm assuming the inlet valves......

Originally Posted by mfc

I've done the seals and lapped in new valves...... I didn't think before but it could be the valve stem guided.... ( do they have them on the exhaust valves )... Anyhow I've got a set for I'm assuming the inlet valves......

Exhaust valves do not have the potential of oil usage that inlet ones do - the exhaust pressure tends to push oil back up the guides, inlet, the manifold vacuum tends to suck oil in - and is often very effective at doing so! Also, on this engine, gravity helps oil run down the guides on the inlets, hinders on the exhaust.

John