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Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3414

2012 Defender 90 Puma 2.2 CSW Santorini Black

Good to hear that Tomotomo.

Too much diesel on the cylinder bore is not helping on ring wear, but the first couple of cranks before a diesel engine fire up, the diesel is actually helping the rings and valves to make a better seal.

Probably in your case, that amount of diesel, or the viscosity of the diesel was not enough to improve the sealing and get the required compression and hence temperatures to spring into life.

Compression test kit? First make sure that the compression kit that you are getting is for a diesel engine. Diesel engines are capable of huge amount of compression, that a kit designed for petrol engines will become permanently damaged.
For diesel engines, a leak down test will probably give you more useful information on where the problem is. If you have a small compressor, you may try to get an adaptor and supply air pressure into the cylinders, and then listen (or feel) where the air is leaking most.. crankcase means rings, exhaust means echaust valve and intake means intake valve is a problem.

Cannot find a rebuild kit for the engine? 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

30th Mar 2021 7:40pm

Tomotomo

Member Since: 13 Feb 2018
Location: Bucks
Posts: 71

Thanks for your help.
I have got a diesel compression kit being delivered. It comes with some adaptors so I will try the compressor leakdown and see if I can pinpoint the loss of compression further.
I am.going to try and start it from cold tomorrow and if it fails to start I will know I have to get on with a replacement or rebuild.
I have never rebuilt an engine before. Maybe I should learn.
Thanks again

30th Mar 2021 8:37pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3414

Below page specifies the compression pressures.

https://www.manualslib.com/manual/1154027/...ml?page=76 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

30th Mar 2021 8:57pm

Tomotomo

Member Since: 13 Feb 2018
Location: Bucks
Posts: 71

That's Great thanks! I will post my findings

30th Mar 2021 9:07pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17388

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Tomotomo wrote:
Do we think that all my cranking and subsequently all that diesel spraying into cylinders could have washed the residual oil away on the bores causing the piston rings to loose their sealing abilities?

No, it is most likely that the engine is excessively worn.

30th Mar 2021 9:17pm

Tomotomo

Member Since: 13 Feb 2018
Location: Bucks
Posts: 71

Ok thanks blackwolf.
It started up this morning right away from cold?! As normal !

31st Mar 2021 8:10am

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3414

Was the engine sitting idle for a long period of time? Perhaps outside?
If yes, it could have simply been a sticking ring, or a little corrosion on the valve/valve seat?
The fewer the cylinders in an engine the more it needs to be in top condition for it to start easily. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

31st Mar 2021 9:13am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

Drain coolant removing head check valve/valve seat and also with piston down check liners for no scoring rust or glazing and no lip at the top of the liner

If its ok new head gasket set reassemble top end

31st Mar 2021 9:44am

Tomotomo

Member Since: 13 Feb 2018
Location: Bucks
Posts: 71

I guess the machine sat for 3 weeks. Maybe I knocked a small bit of crud into cylinder when doing glowplugs or had injectors out?
Anyway turns out my cheap compression kit adaptor doesn't fit. I am going to use the dumper this weekend and see how it behaves.
Dorsetsmith that is probably exactly what I should do but I have quite a lot of work on at the mo. I think I will keep my eye out for a spare engine and in carry on for now.
Thanks all, a lot of knowledge on this forum

2nd Apr 2021 7:52am

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