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Puma22

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

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?

25th Jun 2022 9:53am

hank

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

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

27th Jun 2022 7:23am

Big Harold

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

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

27th Jun 2022 9:33am

Puma22

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

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>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.

4th Jul 2022 12:50pm

ickle

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

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

4th Jul 2022 3:45pm

Puma22

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

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.

4th Jul 2022 3:46pm

ickle

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

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

4th Jul 2022 4:17pm

Puma22

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

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>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.

5th Jul 2022 7:21pm

Puma22

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

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

13th Jul 2022 4:14pm

Big Harold

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

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

14th Jul 2022 2:05am

Puma22

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

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.

14th Jul 2022 7:35am

Puma22

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

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.

15th Jul 2022 1:48pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3425

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

15th Jul 2022 2:22pm

Puma22

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

It was tuned, with a larger intercooler. But this was removed (due to clutch wear) before the fault occurred.

15th Jul 2022 2:26pm

Puma22

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

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.

15th Jul 2022 2:29pm

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