1.8 Diesel Turbo

OwenP · Post by **OwenP** » 13 Apr 2005, 22:50

I'm once again looking at Autotrader for a new 405 estate.
Have spotted a couple of v. low milage J regs, however they seem to have 1.8 litre diesel turbos. Did pug make 1.8 DTs? I thought they only did 1.9s. If these are genuine is there anything to note as a major difference/drawback to them?
How different are the 1.8s to work on?

JohnD · Post by **JohnD** » 13 Apr 2005, 23:49

The two engines are: XUD9 which is 1905cc and XUD7 which is 1769cc. It's the XUD7 which is sometimes called 1.8 The only difference is the smaller engine has a piston diameter of 80.0mm and the 1.9 is 83.0mm. Stroke is the same in both. Slight difference in comp ratio.

np · Post by np » 14 Apr 2005, 00:56

Upto J/K reg(old style dashboard)i think the turbo`s used the 1.8,& the N/A non turbo`s used the 1.9.Had a firms car a fair few years ago that was an early F reg est.1.9 non turbo.Then the firm got a TD,H/J reg i think,with the 1.8.When the dash changed to the later more rounded shape,both the TD`s & non turbo`s got the 1.9 XUD.My Dad had 2 later K reg est`s with the N/A 1905cc,& the 1905cc TD.

fastandfurryous · Post by **fastandfurryous** » 14 Apr 2005, 04:35

I've had both 1769TD and 1905TD 405 estates, and although the 1905TD engine is more powerful (just) and has more torque, the 1769TD engine always felt more free revving, and "sportier". The other difference between these engines is that the early ones have the aluminium thermostat housing, and a seperate filter, whereas the later ones have the filter housing mounted on top of the thermostat housing, for which the cover is GRP.
Personally, I like the earlier model better, as the dashboard has more hidey-holes in it, and the engine access is a little better. Plus the early models are cheaper. A lot cheaper. The very best 88-92 405 diesel estate should be no more than £400, and an average one should be about £200. I recently sold my old 1769TD estate on ebay, and got far more than it could possibly have been worth, at £410. Still, that's ebay for you.
If you find a good one, that hasn't got the dreaded rear-wheel-lean problem (mine had!) then it's a sound investment. All the usual XUD checks apply of course, especially check for Head-gasket failure, as the radiator and header-tank layout on a 405 is not the best, and if there is any air in it at all, the engine runs the risk of boiling due to lack of circulation. You only have to look at the routing of the bleed pipe from the top of the thermostat housing to realise why!

fastandfurryous · Post by **fastandfurryous** » 14 Apr 2005, 04:39

P.S. if you find a 405 1769TD estate going extremely cheaply indeed due to engine problems, I have a near-perfect 1991 1769TD engine spare/for sale at the mo. Cheap to anyone on this forum. Can deliver too.