TD massive over revving / runaway... blown turbo and engine

[JayW]

There's only 2 different head castings, square port (n/a) and oval port (TD). Technically it's irrelevent whather it's from a 17td or a 19td, it's the cams which differ (and either of those work in each other, i know, i've used3 of the 4 available)

[messerschmitt owner]

Adrian

the runaway will do that! I had my old 17RD overfilled and it ran away with me - killed the glow plugs totally. Car was fine with new plugs - lasted three years after the runaway.

Oh, I've also a good undented wing in the right colour for the Auto, is there a way I can drop it off at Minch and it'll find its way to Clifton?

Campbell

[themildbunch]

Oh, I've also a good undented wing in the right colour for the Auto, is there a way I can drop it off at Minch and it'll find its way to Clifton?

Campbell

Yes, no problem - sent you a PM...

[themildbunch]

There's only 2 different head castings, square port (n/a) and oval port (TD). Technically it's irrelevent whather it's from a 17td or a 19td, it's the cams which differ (and either of those work in each other, i know, i've used3 of the 4 available)

Thanks Jay:



Looks like it is a TD one then...

[JayW]

Just make sure you match up and swap over any blanking plates, sensors and studs.

And i presume the spare head has it's own cam caps?

[Kitch]

There's only 2 different head castings, square port (n/a) and oval port (TD). Technically it's irrelevent whather it's from a 17td or a 19td, it's the cams which differ (and either of those work in each other, i know, i've used3 of the 4 available)

Thanks Jay:



Looks like it is a TD one then...

Square port and oval port isn't turbo or n/a related, it's a change the engine went through in the 80's. Oval ports are early models (though many 1800's carried on with oval ports, mainly n/a billy basic ones). All 1900 XUDs went square circa 1987-1988 IIRC, but could be corrected on the years.
Pretty sure the 1989 19RD estate we've got is square.

[docchevron]

no no, the early heads were square port, the later XUD's were oval

[smiffy1071]

I concur, my old C15D was a square port engine.

[themildbunch]

Ok.. thanks.
Am I right in thinking then this head would, when rebuilt, work on a 1.9 td from a 405 or xantia?

Moving soon so a cheap estate I could nick the engine out of later for the bx would be a plan.

[smiffy1071]

As far as the 405 or ZX go, you need to be mindfull of the age.

Somewhere along the production run, they changed from a pulley driven vacuum pump which will work like a BX LHM pump, to a direct drivem vacuum pump.... which will not!
The cylinder head, and the camshaft will be different.
So, if the head is coming from a 405, be sure is has the older belt driven vacuum pump.

[themildbunch]

Oh, ok - but I'm thinking about doing it the other way - get my spare 1.7td BX head machined and built up in readiness to plonk on a 1.9TD engine from a donor 405 / xantia estate that I'll need to run around in for a few months...

Space is a problem but I can get a spare head ready inside pretty easily so when I do get around to removing the old BX engine and new engine I'll have a nice new head to put on it and a new clutch etc... hopefully a silver lining to my BX cloud

[Tim Leech]

I take it the square/oval port heads are interchageable?

[Defender110]

I would have thought the ports match the manifold so interchangeable if you use the manifols aswell.

[docchevron]

/\ yes