Engine number

[painter]

This has been on the forum previously but no resolution due (I believe) to Jaguar not keeping records on replacement engines. I know the engine on my '96 XK8 (coupe) was changed at
75k in Dec. 2005. I have previously tried to trace the replacement engine No. (supplied by Riders in Falmouth) but no luck. I have had a mechanic find a number on the block which is
5AJDFS12725P. Does anybody know how to translate this into useful info. such as engine build year etc.?

[aaj]

Hi Painter

As far as I understand, assuming the engine only failed the blow by test, the only new (new to you) parts of the engine supplied by Jaguar was the Block assembly including Crank, Rods & Pistons but without Timing Gears/Chains/Tensioners etc. All the rest of the existing Engine parts were re-used (surprisingly, even 1st generation chain tensioners!). Therefore you would not get an Engine Number in the form CEyymmddhhmm (1st generation V8 engine number format).

According to the Haynes book 'you & your Jaguar XK8' (page 103) the replacement Block was painted grey & a Label fixed. The example in the Book has a Part Number of: NCC 1002 JAE and a Exchange Serial Number of: 1AJD 1867

Assuming all replacement Blocks / Engines used similar Labels I would suggest the number found would most likely be a Casting Number from the Foundry.

There are no Engine Numbers in the form given above (Exchange Serial Number) in the XK8 Register.

AllanJ

[painter]

Hello Allan,
thanks for the reply. I know the engine supplied by Riders was 'complete' and exchanged for the old engine, but I can only assume that the problem was the liners. I have had the tensioners checked (also water pump) and all are latest generation, but again these could have been changed by a.n.other at some stage, though there is no indication of this in receipts. Pretty untidy of Jaguar, it would be nice for owners to be provided with this info.
p.s. where would the original engine number have been? would they have removed this on a replacement?

[Brakebuster]

replacement engines were ' re-engineered ' , and would have come from another original car that had also failed

Jaguar sent of the blocks to an engineering company for refurbishment , and as such the original number would be removed and a refurbished number stamped , so no issues of cars with the wrong engine number to chassis would happen

if i remember correctly , there were also examples of new engines being installed as replacements under warrantee , these would have normal number but of a later production date than the car, but should be fully documented , this was either due to a shortage of re-engineered engines and or the insistence of the customer to get a ' new ' engine......

the engine number should be on top at the back under the throttle body position, i am not sure where the re-engineered numbers would be , possibly a similar place ??

BB

[painter]

Hi Brake Buster,
I've checked back on the paperwork at time of engine replacement, and the description for the work reads 'replace exchange engine unit complete swap over ancillaries'. There is a part number listed for the exchange unit which is JAG NCA1002BA (total £6080.00 incl. kit seal etc.) and oddly there is a client contribution of 20%. At that time it was evidently a warranty claim so it looks as though the problem probably was not Nikasil related, as this would have been down to Jaguar. I did trace the engine supplier to Riders Jaguar (before they went down, although they did not do the work) and they confirmed from memory that it was a complete engine but could not provide an engine number as it was an exchange unit! The above confirms your description from Haynes, but I don't suppose there will be anything left now to trace the build date of the engine. (maybe best not to know)
(Thanks for the reply)

[mike020150]

Hi,
As originally produced, the engine number is located at the front of the engine, below and slightly to the right of the thermostat housing. It's awkward to see with the hoses in situ and the bonnet in position. The information visible on the offside below the throttle housing is the emissions code information. Jaguar replacement engines had the replacement engine label similarly located. Mike.

[Tonyinmeva]

Hi folks just been reading through old posts looking for advice on removing the crankshaft pulley, anyone know how ?
Any way ,I am about to replace the tensioners on my 1998 xk8 and have it partially stripped.
And I can confirm that engine numbers can be found next to the thermostat housing, my engine was changed under warranty and I now have fitted a 1997 engine....it is stamped E 9711280813. Although my V5 document still has the original number !.......and yes it has the old plastic tensioners.

[mike020150]

Removing the crankshaft damper requires proper tools to lock the crankshaft and to remove the damper, otherwise damage is almost inevitable. The damper securing bolt should be renewed as a matter of course. Its tightening torque is extremely high and the actual tightening procedure differs slightly dependent upon whether or not the damper utilises a split locking ring. Mike.

[Tonyinmeva]

Thanks for the reply Mike, this probably is not the right thread to continue this item ,but I don,t know where else to reply.
Checking online and tool suppliers I was unable to get a satisfactory answer apart from use a rattle gun , or using the cam locking tools and flywheel locking pin . I did,not like the idea of either.So decided to make my own ,the pulley has four banana shaped holes in it so made up a tool from 75mm dia steel tube and cut out four top hats to fit and welded on a handle long enough to rest against the chassis to stop it spinning.
Worked like a dream.
I would never have moved it any other way I had to use a 4 foot long bar on my socket and still it was tight, it fought all the way out.
someone gone overboard with the locktight.
Now to set about the timing chains.

[mike020150]

Well done. It sounds like you have made a tool very similar to the official Jaguar version. Enjoy the rest of the task! Mike.