There is a brand new V12 bare block on UK Ebay. The guy selling it does not know if it is a 6 litre or 5.3.

The numbers on the block are:
P45300A LM25TF 3 DM

Can anyone tell me what the block is?

Thanks, Greg

 

Hi Greg,

This is a peculiar one as I have pondered over this myself.

I enclose a wikipedia link and it details Henry Ford refferring to his "en block" as a 1 piece engine.

http://en.wikipedia.org/wiki/V8_engine

I hope it helps, there is also a V12 page but this details more to do with the block, which I think is just US garb so to speak, good luck!
Stu

 

I recently posted a host of Updated for the XJS and it had a little info on the V12 but not sure it will provide you with what you need but no harm in looking.

Link JagRepair.com - Jaguar Repair Information Resource

 

The 6.0L block has added material around the LH side of the bell house where the casting was changed for the 4L80e, it still has the bolt bosses for the TH400 undrilled. Apart from this the block is identical to the lip seal 5.3L.

 

Warrjon
Does this mean that the block could be used to build a 5.3 engine, and that all the bits would fit except for the possible drilling of the bellhousing mounting/bolt holes? Here is a link to the ad with some pics, in case it helps. CLASSIC JAGUAR V12 BRAND NEW ENGINE BLOCK | eBay
If I bought this, it would be to build up a brand new 5.3 HE, so that is the main point for me.

Thanks

Greg

 

Greg

i to have seen this block

but what advantage does this hold over your existing block ?

as the casting is just that, and no different you your engine unless yours is cracked. and would jet was up as if it was brand new if not damaged......

all the liners for the pistons are still needed , as are all the bearing surfaces, and these will go in your engine just the same

the only real advantage i can see is building it up while your existing one is still being used, but thats about it ,

BB

 

I have stripped my 6.0L and the block is sitting on a pallet in the shed, as far as I can see the block except for the bellhouse is identical to my 5.3. My 6.0L has been re-drilled for the TH400 pattern as well, as I was going to swap the engines. My plan now is to put the 6.0L rotating assembly in my 5.3.

Be aware Jaguar introduced the Lip seal engine around 1989 and my 5.3 is an early lip seal. So if you have a rope seal crank it will need to modified at the rear main seal to fit the lip seal. JDHT lists 4 different part numbers for pre-facelift 5.3L block in the facelift both the 5.3 and 6.0L blocks have the same part number

It would be safe to assume the following
1st would be BW transmission
2nd TH400 rope seal
3rd TH400 lip seal
4th 4L80e (as the part number is the same as the facelift 5.3/6.0L

All ancillary bolt ons are the same.

 

The difference between a 5.3 and a 6.0 is the crank, lol

 

warrjon; can we see some close pix of that area of the block, like can we put a lip seal in a 1978 5.3 block with a mod?

 

I'll take some pics when I get back home. I am in your neck of woods (USA) for a month.

I know the crank rear is smaller in diameter for the 1 piece seal.

 

GREAT, sounds like a plan, seeya.

 

What brings you to the good ol' us of A warron?

 

I have a training course in Dallas in 2 weeks, so I thought we would drive from LA to Dallas via San Francisco. Cheers Warren

 

drive from LA up to frisco, shore hiway,,NICE, but winter is here and to get dallas drop down to vegas and go east on I-40, but weather can be problem also, great drive in summer ,done it a few times.

but a warm weather route would be down to Arizona and pick up on I-10 east, I-10 also goes out of LA.

have fun,enjoy,, quick fact, Austin is only 90 miles from Dallas South I-35

 

We are in Santa Barbara tonight and travel up the coast to Monte ray then to Frisco the day after.

Frisco to Vegas via Fresno then to Williams see the Grand Canyon on to Roswell then to Dallas.

We get into Dallas Sun 9th I have a week of work and fly out the following Saturday, I would have loved to see Austin but time is against me.

 

hi warrjon; if you go from vegas to Grand canyon, to williams, and on to roswell you would be on I-40 most of the way, you would get off I-40 and go down to roswell, and most likely on I-20 into DFW(Dallas fort worth).

that I-40 is pretty much straight, but the old famous route 66 meanders off and on& around it, i hope the weather is in your favor!

GOOD LUCK

 

to bad you cant do austin, we could check out the NEW F1 track, its totally awesome!

voted one of the best driver tracks in the F1 venue.

what will be will be.

 

Hi Ron

Here are some pics of my 6.0L rear seal, crank etc. I have not seen in the flesh a rope seal only in pictures. My understanding is the block is the same only the crank seal journal is different (small in diameter for 1 piece seal).

 

Warrjon

Do you know what has to be done to convert rope seal 5.3 crank and block to take a modern one piece seal, please?

Greg

 

I do not have a rope seal block to verify the block is the same. It looks like it from pics
i have seen. If you want to a conversion I would suggest buying a 1 piece seal and fit it to the block.

The flywheel flange on the crank will need to be ground down to fit inside the new seal.