Engine block corrosion?

[scm]

Yes the AJ-V6 and AJ-V8 are Ford engines which were produced at the Ford Engine Plant in Bridgend, South Wales.

Not this misinformation again, please. They're Jaguar engines, designed by Jaguar engineers and originally built for Jaguar by Ford, who owned Jaguar at the time.

[RPSN]

Yes the AJ-V6 and AJ-V8 are Ford engines which were produced at the Ford Engine Plant in Bridgend, South Wales.

Not this misinformation again, please. They're Jaguar engines, designed by Jaguar engineers and originally built for Jaguar by Ford, who owned Jaguar at the time.

Hey Mr Pedantic,

You can also say that the manufacturer of these engines was the Ford Motor Company for Jaguar Cars.

The AJ-V6 engine is a specialised version of Ford's Duratec V6 engine. This original AJ-V6 was based on a Ford Duratec block and was starting to show its age. It was used primarily in the Mondeo-based Jaguar X-Type and S-Type as well as the early XF's and it wasn't a particularly exciting engine.

However, the ball changed when Jaguar updated their 6-cylinder to the AJ126-V6 (used on the F-Type). Based off Jaguar's AJ-V8, this new V6 shared no similarities with the previous one. A 3.0L engine with a compact but extremely powerful supercharger and a power output between 250kW and 294kW (approx 340-400PS). It was manufactured by Ford but designed and developed by Jaguar.

[scm]

The AJ-V6 engine is a specialized version of Ford's Duratec V6 engine.

Yeah, I've seen that misinformation elsewhere, too. Actually, it's a modified version of the Jaguar V8 - same block and you can see where the front two cylinders would be. So maybe Ford's Duratec engine is a specialised version of the Jaguar engine?

BTW, it's not pedantic to correct misinformation.

[Tel]

As a true pedant, one may have highlighted your original spelling of the word specialised...

The AJ-V6 engine is a specialized version of Ford's Duratec V6 engine.

[RPSN]

The AJ-V6 engine is a specialized version of Ford's Duratec V6 engine.

Yeah, I've seen that misinformation elsewhere, too. Actually, it's a modified version of the Jaguar V8 - same block and you can see where the front two cylinders would be. So maybe Ford's Duratec engine is a specialised version of the Jaguar engine?

BTW, it's not pedantic to correct misinformation.

Sorry to inform you but no misinformation was provided.

I have to correct you as the extra two cylinders on the AJ133-V8 are at the rear of the engine and not the front!

Here’s some further info on these previously Ford manufactured engines (AJ126-V6 / AJ133-V8).....

Jaguar Land Rover’s AJ126 isn’t just an eight cylinder with two dead holes, as its six cylinders have a smaller bore and stroke than the V8.

Sharing the exterior block details enables one mounting system to serve both V6 and V8 engines. New partitions inside the die-cast aluminium V6 block supplant the deleted cylinder bores

[Deleted User 1715]

As a true pedant, one may have highlighted your original spelling of the word specialised...

The AJ-V6 engine is a specialized version of Ford's Duratec V6 engine.

[TopCat]

The particular OP looks to be a combo of oxidisation and possibly some coolant attack. The reason I say coolant, is the depth of scour in the metals' surface.

For coolant, then you need to find the source of the leak.

I did wonder if there was a coolant leak based on the marks on the top of the engine which look like splash marks.

Today I have ran the engine up to normal temperature with the cover off and cannot see any leaks, also the engine has never ran exceptionally hot to suggest a low coolant level, nor have I had to top the coolant level up. I have owned the car from new.

Any suggestions on what may have caused the marks?

I appreciate the recommendation on alubrite. I am a little wary of using an acid based product, partly due to areas being difficult to access and also running an hose over the area not knowing what it is running down over and if it will pool anywhere that I rather it didn’t. I expect I will have a discussion with myself over the next few weeks on the relative merits of cleaning and sealing verses leaving as is.

A couple of photos from today to add to the picture.

[Deleted User 1715]

Yes the AJ-V6 and AJ-V8 are Ford engines which were produced at the Ford Engine Plant in Bridgend, South Wales.

Not this misinformation again, please. They're Jaguar engines, designed by Jaguar engineers and originally built for Jaguar by Ford, who owned Jaguar at the time.

Read an interesting article here: https://www.jaguarheritage.com/jaguar-h ... v8-engine/

Seems it’s a Jaguar designed and developed engine (AJ126 and AJ133) which was built at a new additional building at the Ford Bridgend plant and was then taken and modified by Ford for use in a few of their cars. With such widespread use any aluminium corrosion problems that could be a real concern would surely be known about by now?

[TopCat]

With such widespread use any aluminium corrosion problems that could be a real concern would surely be known about by now?

I’m inclined to agree, I was just surprised to see the corrosion which prompted the original question.

[JurassicF]

Just cleaning my F-Type and decided to take the plastic cover of to have a look.
Nothing anywhere near as bad on mine over 5 years old and 30,000 miles, but garaged.