Talk Morgan Forums Community Vehicle Talk (non-Morgan) Howards Dillema...Almost.

John, I think Mazda may have tried or introduced a double injector system, with the usual DFI in each cylinder and an additional injector in the inlet manifold to inhibit, or more correctly, wash the sludge out of the inlet tract and cleaning the backs of inlet valve heads as part of the process before it ends up in the combustion chamber..?

With 993`s being the age they are, corrosion is ever likely to be the issue. Windscreen surrounds front and back tend to bubble up and rear chassis legs corrode rather badly too, A glossy coat of paint can hide some shoddy repairs, air condition maintenance can be expensive too.....

My only claim to fame is that I was the first private individual in the UK to drive the then new to market 993, when I was invited along to it`s launch at Cameron House Hotel on Loch Lomond...

Quite the best 993 video on the model I have come across is this one all be it with a US bias, but this chap really knows Porsche...

There is little doubt that this is the case. Apparently some police cars are in very good nick despite the use they are put to because the engine rarely gets cold and its warming up from cold that most wear occurs. A pal has the same model Ferrari as mine but the mileage in 20 years is north of 150k ( I think 180k) yet the engine is sweet using no oil and if anything more mechanically quiet than my car at 21k miles.

Oil drain from the top end is the issue. I had a Stag for 30 years, didnt use it much at all but kept periodically starting from cold in storage in the belief that was good for it. It wasnt. The cam bearings farthest from the oil pump failed and since these ran in the head line bored ( ie no shells) it was a head replace job.

Howard, I was interested in your comments on the Stag issues re the OHC and your thinking on periodical start up`s and that you determined those as being the cause of premature bearing surfaces in the cylinder head.... ?
I am not in anyway suggesting you are incorrect in your assumptions, though as I typed in my ramble in terms of oil drain down, it seems once drain down may have been thought to be an issue in early adoption of OHC engines in mundanemobiles, that oil companies may have altered the formula in the make-up of their oils to try to overcome drain down to some extent...?

I suspect today that there may be numerous types of oils available and that some vehicle manufacturers are very specific relative to the exact specification of oil required to suit any particular engine.
For sure there will be some sort of marketing tie up between oils and vehicle manufacturers as one might expect but Engines and their the manufacturing tolerances have changed since the time my mid 80`s +8 hit the road.
I suspect with more accurate and perhaps tighter bearing clearances that some degree of drain down may have been accomplished, to the extent that "thinner" oils may be used such as the change over to synthetic oils for most modern vehicles...?

In the case of your Stag Howard, perhaps dependant on the actual circumstances at the time, the time between start ups and the oil in use there was enough time for the oil to drain from the cylinder head between every start up, equating to an oil starved cam on each and every start up, which using my logic, would seem to equate to excessive wear and eventual failure..?

There are numerous theories as how best to maintain a classic during times of lay-up and I guess that may differ to some degree dependant on the age of the engine design. I suspect those engines of an age designed to run on synthetic oils may indeed need little in the way of semi regular start ups, assuming the correct grade of oil is used in the engine and preferably a known quality brand if not that which the manufacturer specified..?

I know of one 993 owner who lay`s up his car for months on end and supposedly just jumps in turns the key and drives off...whereas some with similarly aged Porsches remove a relay to inhibit the engine firing up, and crank it over till the oil pressure begins to rise before putting the relay back in and firing it up...As ever each to their own (-:

While typing of oil.... When touring some years back and finding it difficult if not impossible to locate Castrol at French service stations, I did spot a can of STP oil treatment, which when added to the old +8 considerably reduced it`s usual thirst for oil.... Yeah I have read that STP may have other issues, but circa 20 years on my old +8 still seems to be running just fine... (-:

Just watched this vid which is the other side of the coin from the JayEmm vid link I posted, where he was presenting his thoughts on why a Ferrari could be a better choice for some than a Porsche.
I suspect given Peter`s contribution to this thread he can perhaps agree with much to be found on Boxter ownership that is promoted in this vid...?

I’ve just bought this,the ultimate supermarket/high street transport, that car park has some puddles almost an inch deep, you’re risking life and limb with your tiddly little sports cars.😂 I might have wasted my money though both Aldi and Lidl have immaculate car parks here, you could play billiards on them.

In my defence, I do actually need it for work, it will earn its keep. Despite this being the cheapest, most basic spec of 110 they do, it’s very comfy and very fast too. Best bits, I can start it remotely with my phone, the cup holder takes a proper mug with a handle and it has a heated steering wheel.👍
Worst bits, it looks like you can’t permanently disable the speed limit warning bongs nor the lane departure interferences.

^ Although I'm not an SUV fan, It's a refreshing change to see one on steel wheels. As for the annoying bongs & bings I've managed to get them disabled a few times by speaking to the service manager when he has his diagnostic 'laptop' to hand

I love the steel wheels as well, although I've seen these modern interpretation, which I also think suit the new 663. I've also had friends with the JLR steels and they seem to suffer from corrosion issues.

https://www.rotiform.com/gallery/38020/land-rover-defender-stl/

They look good on this Roadster too..

That’s disappointing to learn they rust easily, I was hoping these would be better than the norm but I’m not surprised, every trailer or towed equipment I have is a rusty mess within a couple of years. There’s not much I can do to preserve them, they’ll get a lick of delux gloss next Christmas if they misbehave or I might buy a set of new secondhand alloys In the future, there are plenty for sale unused with new tyres for less than the new tyres cost. I like the steel wheels but I’d rather have fat, chunky Goodridge tyres, those road tyres look lame, they seem to do the job for now though, they’ll certainly manage to bump up a kerb outside Starbucks which is all these cars are usually bought for 😂
Perhaps the rust is the only British element left on a landrover, I’ve no idea where it was built but it wasn’t England, they sent an email last week to tell me it was at the docks so either it has a seedy secret habit or it arrived on a tea clipper or Banana boat.

One point re tyres - Harry (of Harry's Garage) had a Defender 90 on long term test. He put it through some extreme off-road exercises as well as using it extensively on the farm. His conclusion was that the standard tyres were perfectly adequate for his usage on the farm plus a bit and that the full off road tyre option was an extravagance that could be avoided.

I have run 3 x Discovery's on Pirelli Scorpion Zero now and never had a problem. As a compromise M&S / road tyre, they have proven to be excellent. However my most extreme tests are heavy snow and towing a 3T horse trailer out of a muddy field.