I bought 420g with not running engine. I have good engine from XJ 1982 with Borg Warner 66 gearbox. Is possible to put this newest inside without any changes? I will change injectors back to carburetors ...

 

1982 engine with injection & borg warner 66
Jaguar 420G - 1968

 

I have no doubt the engine will fit in the engine bay, but it is unlikely to drop in without some mods, probably to the engine mounts, and the gearbox mount. You really need to check the locations on the body shell for mounting the engine and gearbox and their distances from each other then compare to your engine/transmission assembly. If you have the original engine and gearbox, then do a comparison of the items I mentioned.

I expect you'll need new engine mounting brackets and the same for the transmission. It could be the propshaft will need shortening or maybe lengthening. Other things will be coolant hoses and other ancillary items.Nothing impossible, though, IMHO.

What you're doing is rare so there is not a lot of experienced people around to tell you exactly what you have to do. I'm just giving you an educated guess.

BTW your late Series 3 engine will have the head witht he larger inlet valves and will give more power than the original engine.

 

Hi,

It might be worth looking at MK2 forums for information on this, i'm sure it can be done as I have seen cars with these fitted but I don't know whats involved.

I would assume that you would just strip the XJ6 engine of all ancillaries and use the ones from the 420G. You might need to swap the sump as well.

 

I removed radiator, it's in good condition, but much bigger than in series 3... a problems with overheating, or why are holes in inner wing??


radiator 420G

holes in inner wing

 

to put a S2 into my RHD 420G;

engine mounts good

oil filter MUST point up or down, not out on RHD

I had to change sump, oil return pipe, modify baffle, 420G filter block, XJ cam oil feed pipe

an upwards filter needs a shorter cannister

kickdown/throttle mechanism gave me a lot of trouble, but I changed to manual choke HS8, and retained the BW8

also swapped WP pulleys and viscous fan, as the later items make for a very close fit to radiator

 

Any updates on this proposed project?
Thanks.

 

Engine is finally out. If I compare 1968 and 1982 not to much difference. I'm optimistic
​​​​​​Engine mount, and filter is different...

 

Thanks for the update.
Are you still going with carbs? Are you not using FI to keep period-correct, or due to complexity in switching over?
Also, which type oil filter are you going to use: upwards spin-on unit or downwards can+filter?
Thanks.

 

BTW, very nice grey color exterior.
Can't tell the interior color, but is it black?

 

ok, you have RHD...all the issues come about due to the oil filter..an XJ oil filter will not clear the steering column on RHD 420G

This leads to many issues, because you have to swap the 420G oil filter block across to the new engine, this also means the oil return pipe to the sump will not fit, meaning the sump needs swapping as well..and the baffle needs cutting to size to allow the (S2) oil pick up pipe to sit down in the well.

(I am pretty sure a 2.8 sump and return pipe will fit..if you can find one..I saw one after I had completed mine!)

Another tricky issue arises then because the Camshaft oil feed pipes are different, and there is no drilling in the later blocks to accept the 420G pipes..an adaptor block is needed, and the newer pipes..or you will not be able to fit an Oil pressure sender..or the cam feed pipes

You may be exceptionally lucky, as I believe mine came from a S3 (purchased from a lister on Jag-Lovers Forum..its about 2" X 1" x 1" alloy that sits atop the the filter housing)

I have put up pictures and write up on that forum, same username as here..see below

https://forums.jag-lovers.com/t/s2-x...420g/349224/15

The firewall gear box mount is needed I would say, as it takes a lot of weight

I used the original BW8 gearbox mainly for that reason..it is stronger than the later aluminium case boxes anyway

As I mentioned earlier, the Water pump, pulley and Viscous clutch must also be swapped, the XJ setup is just too close to the radiator..less than 1cm

note, it is possible to fit an upwards mounted filter, but you need the correct (rare) adaptor, and the filter has to be a very stubby non-Jag item that is obsolete

 

AWG - also looked at your link. great info, thanks

 

Blue

 

Thanks AWG for this infos. I understand now... it's lot of small problems... First I will try to recognize what is wrong with original engine. I found already mechanic here in Slovenija, who will check. I hope we can save original for small money ....

 

why did you take it out in the 1st place ?

I would have thought a diagnosis prior to removal would be sensible..ie compression and leakdown test...does the engine rotate ?

In my case, the original engine supposedly was re-ringed by a pro mechanic just prior to my getting it (20yrs ago)..for whatever reason it always used way too much oil,
to the extent of fouling plugs.

So I bit the bullet and took it out, it awaits me to strip it down to find out what idiot things got done

The replacement engine has been in for at least a year or more

 

I bought car with not rotating engine, and oil leaking somewhere under... I have plan to repair engine bay also (cooling holes in inner wings)