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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
I tried annealing on 2 of the cylinders, again no luck.
I’ve read 6Nm, but that doesn’t seem enough? - I’ve got 2 new genuine bolts coming next. I’ve read that they are stretch bolts, so perhaps other brands are inadequate?
Post #956535 25th Jun 2022 9:53am
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hank



Member Since: 12 Sep 2016
Location: South Wales
Posts: 2301

Wales 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
On 2.4 it is 6Nm plus 180 degrees. Not sure whether this is the same for 2.2 > 110 XS Double Cab
Post #956623 27th Jun 2022 7:23am
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Big Harold



Member Since: 09 Jul 2018
Location: nsw
Posts: 71

Australia 2015 Defender 130 Puma 2.2 HCPU Alpine White
Puma22 wrote:
I tried annealing on 2 of the cylinders, again no luck.
I’ve read 6Nm, but that doesn’t seem enough? - I’ve got 2 new genuine bolts coming next. I’ve read that they are stretch bolts, so perhaps other brands are inadequate?

The extra 180 deg might explain why they are leaking.
Mark
Post #956631 27th Jun 2022 9:33am
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
I have now changed the bolts for genuine LR ones, there was a very slight length difference. However I still have the blowby.

I now have another fault code, "P2263-22 (EC) Turbo/supercharge boost system performance - General signal failure - signal amplitude&gt;maxiumum"

Does anyone know if this can be related to blowby and should I start to look at the turbo, or is this perhaps a conincidence and I now have 2 faults.
Post #957245 4th Jul 2022 12:50pm
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ickle



Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1786

France 2008 Defender 110 Puma 2.4 CSW Alpine White
Possibly disturbed the loom to the turbo? Notorious weak spots over the air con pump and around the ferrite ring.

I was always told to use new stretch bolts and anneal the washers even if genuine.

HTH Keith
Post #957269 4th Jul 2022 3:45pm
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
I seen this is a problem on the 2.4's, so I checked mine and it must be a different loop as there is plenty of length on mine.
Post #957270 4th Jul 2022 3:46pm
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ickle



Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1786

France 2008 Defender 110 Puma 2.4 CSW Alpine White
IIRC there is a ferrite ring wrapped into the loom just near the multi plug connector on the turbo - pretty sure someone on here had the wire fail on this ring.

Good luck

Keith
Post #957273 4th Jul 2022 4:17pm
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
Puma22 wrote:
I have now changed the bolts for genuine LR ones, there was a very slight length difference. However I still have the blowby.

I now have another fault code, "P2263-22 (EC) Turbo/supercharge boost system performance - General signal failure - signal amplitude&gt;maxiumum"

Does anyone know if this can be related to blowby and should I start to look at the turbo, or is this perhaps a conincidence and I now have 2 faults.


I have now checked the loom and disconnected the actuator to prove this is not sticking. Another item rules out.
Post #957391 5th Jul 2022 7:21pm
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
For information the result here is a cracked piston. I’m waiting to hear about the injectors, but it’s suspected a faulty injector caused this.

Click image to enlarge
Post #958175 13th Jul 2022 4:14pm
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Big Harold



Member Since: 09 Jul 2018
Location: nsw
Posts: 71

Australia 2015 Defender 130 Puma 2.2 HCPU Alpine White
Bingo!
However I don't believe in the injector theory, I believe that the pistons are the issue.
The failure mode is exactly like the Toyota pistons in Australia and there has been 3 updates to pistons but no injector updates.
Your options are buy just one piston if it hasn't damaged the bore or buy a set and rebuild.
I bought a rebuild kit from Lyme Parts for $1200 Aus that was landed, so pretty decent in my book.
Mark
Post #958237 14th Jul 2022 2:05am
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
Are the Lyme pistons different to the OEM ones? Are they any less likely to crack?
I think a full rebuild is the best option. Luckily there are no markings on the walls.
Post #958251 14th Jul 2022 7:35am
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
All injectors have been tested and returned to me, all tested okay. So it appears this might just be a defect with the pistons themselves? I’ve heard many stories of no3 piston cracking.
Post #958428 15th Jul 2022 1:48pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3424

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
If you want to see a cracked piston, then have a look at this:
https://www.defender2.net/forum/topic76287.html

Is your 2.2 on standard map, or was it tuned? 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #958429 15th Jul 2022 2:22pm
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
It was tuned, with a larger intercooler. But this was removed (due to clutch wear) before the fault occurred.
Post #958431 15th Jul 2022 2:26pm
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
Dinnu wrote:
If you want to see a cracked piston, then have a look at this:
https://www.defender2.net/forum/topic76287.html

Is your 2.2 on standard map, or was it tuned?


Looking at your pistons, mine is not so bad.
I would like to know the root cause before rebuilding.
Post #958432 15th Jul 2022 2:29pm
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