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alexatnd

Member Since: 19 May 2015
Location: Yorkshire
Posts: 270

TD5 injector woes

So, after some major welding on Gertie our 1999 td5 110 ( where the bolt holes on YRM outrigger nor the britpart one lined up with the body) it was time to have the injector seals changed.

Was going to do it myself but at the last moment thought I'd let the garage do it. Good job I did ....

All 6 rocker arm bolts sheared! On top of that the camshaft lobes were pretty shagged (technical term). Luckily I just happened to have a spare td5 (10p) engine in the garage ( as you do

) so they put that head on and seems to be running. Understandably they were a bit twitchy about doing the injectors on that head just inc case so going to run her for a bit b4 attempt 2. However ...

Anyone else had/heard of rocker cover bolts shearing ? Is it a common occurrence?

Rgds
Alex Santa - 1977 Series 3 - new chassis, tub, disc brakes,SU Carb
Gertie - 1999 110 TD5 - like a Phoenix from the ashes back on road... almost
Effie - 2004 110 TD5 County

27th Mar 2021 7:38am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17386

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

alexatnd wrote:

...All 6 rocker arm bolts sheared! ...
...rocker cover bolts shearing ...

So which was it, the cover, or the tappets, or the bolts holding down the rocker shaft?

The tappet screws are a little dodgy since they are hollow and have a waisted section where the oil feed enters the tappet screw from the rocker arm. It is relatively easy to damage them, especially if you don't realise this. They are also depressingly expensive to replace from what I remember.

The cover bolts shouldn't shear unless they've been massively overtightened at some time.

Similarly the rocker shaft bolts shouldn't be a problem unless they have been abused at some stage.

As it is a TD5, I would also be a little surprised if it had 6 rockers, although I think this may indicate that you are actually referring to the six rocker shaft bolts.

27th Mar 2021 10:16am

alexatnd

Member Since: 19 May 2015
Location: Yorkshire
Posts: 270

sorry typo on my part.

it was the bolts holding down the rocker shaft Santa - 1977 Series 3 - new chassis, tub, disc brakes,SU Carb
Gertie - 1999 110 TD5 - like a Phoenix from the ashes back on road... almost
Effie - 2004 110 TD5 County

27th Mar 2021 1:51pm

geobloke

Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

Well this thread was a few months ago now, but...

Click image to enlarge

...

Now there is a bit of thread stuck 65mm down a very small hole...

The worst of it is that four out of the remaining five bolts still in position fell ridiculously tight. It looks like the garage I had the head gasket done at didn't replace the bolts, used thread lock and some out of this work gorilla strength when tightening down the bolts.

What to do folks, what to do...

10th Jul 2021 4:42pm

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