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Old 08-23-2005, 03:01   #1 (permalink)
evelyn snowling
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2.25 Diesel Blowing Oil

Hi, Our SIIa 2.25 Diesel (5mb) is blowing oil from the rocker cover cap and
possibly from the rocker cover bolts too. This to me sounds like a bit too
much Crankcase pressure.

What could be the cause of this? and how can I cure it?

My engine is slightly unusual as it only has the one filler cap on the
rocker cover and none elsewhere, it has a LDV inlet manifold and filter and
petrol exhaust manifold, plus a mini oil cooler.


Thanks


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Old 08-23-2005, 06:01   #2 (permalink)
Samuel
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Re: 2.25 Diesel Blowing Oil


"evelyn snowling" <snowbobs@tiscali.co.uk> wrote in message
news:430aed43$0$12921$cc9e4d1f@news.dial.pipex.com...
> Hi, Our SIIa 2.25 Diesel (5mb) is blowing oil from the rocker cover cap

and
> possibly from the rocker cover bolts too. This to me sounds like a bit too
> much Crankcase pressure.
>
> What could be the cause of this? and how can I cure it?
>
> My engine is slightly unusual as it only has the one filler cap on the
> rocker cover and none elsewhere, it has a LDV inlet manifold and filter

and
> petrol exhaust manifold, plus a mini oil cooler.
>
>
> Thanks
>


generally, too much crankcase pressure is caused by blown cylinder rings
(big job as you probably know). but a friend was having a similar prob and
we tracked it down to blocked crankcase breather pipes. you know the ones
that let the crankcase gasses flow into the inlet manifold to be burnt in
the motor.

i'm not sure of the set-up on a 2.25 diesel, but check if any of the pipes
have flame-traps or restrictor valves, any of which can get blocked and
cause the crankcase to pressurise.

Cheers.

Sam.


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Old 08-23-2005, 07:01   #3 (permalink)
evelyn snowling
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Re: 2.25 Diesel Blowing Oil

whats the simplest way to tell if its the rings gone?

Its only been just over a year since the engines been put in (approx 2000
miles) but that said it wasnt a new engine, just rather pampered.

thanks,


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Old 08-23-2005, 11:01   #4 (permalink)
Huw
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Re: 2.25 Diesel Blowing Oil


"evelyn snowling" <snowbobs@tiscali.co.uk> wrote in message
news:430aed43$0$12921$cc9e4d1f@news.dial.pipex.com...
> Hi, Our SIIa 2.25 Diesel (5mb) is blowing oil from the rocker cover cap
> and possibly from the rocker cover bolts too. This to me sounds like a bit
> too much Crankcase pressure.
>
> What could be the cause of this? and how can I cure it?
>
> My engine is slightly unusual as it only has the one filler cap on the
> rocker cover and none elsewhere, it has a LDV inlet manifold and filter
> and petrol exhaust manifold, plus a mini oil cooler.
>
>
> Thanks
>


If you have a press-on cap with a three ring rubber sleeve for a seal then
it is likely that this seal has worn a bit slack. A new sleeve will probably
cure it for a few years more.

Huw


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Old 08-23-2005, 11:01   #5 (permalink)
beamendsltd
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Re: 2.25 Diesel Blowing Oil

In message <430b1f62$0$19734$cc9e4d1f@news.dial.pipex.com>
"evelyn snowling" <snowbobs@tiscali.co.uk> wrote:

> whats the simplest way to tell if its the rings gone?
>
> Its only been just over a year since the engines been put in (approx 2000
> miles) but that said it wasnt a new engine, just rather pampered.
>
> thanks,
>
>


Run the engine with the the breather/filler off, if it "chuffs" (sounds
like a sort of popping noise) then the rings are suspect. Does oil
and/or fumes blow out of the dipstick tube with the engine running?
If so a copression test is on the cards, but if it showing those two
symptoms I'd be worried.....

Richard
--
www.beamends-lrspares.co.uk sales@beamends-lrspares.co.uk
Running a business in a Microsoft free environment - it can be done
Powered by Risc-OS - you won't get a virus from us!!
Helping keep Land Rovers on and off the road to annoy the Lib Dems
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Old 08-23-2005, 13:01   #6 (permalink)
evelyn snowling
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Re: 2.25 Diesel Blowing Oil

Hope you are right Huw,

Had the rocker cover off today it looks like the gasket wasnt sealing too
good as it was leaking on part of it (front left corner looking towards it
from the front) and as for the cap/filter its a bit loose so will try and
replace that.

I'm pretty much a novice when it comes to messing with engines but I'm going
over to our local land rover specialist this week to get a full gasket set
(including head gaskets) for the 2.25 as I gave all of the ones I had to the
mechanic that fitted the 2.25 into the land rover in the first place. I'm
also going to totally remove the oil cooler and will also drop the sump and
make sure there are no fragments in there.

Last time it started throwing out oil like this shortly after the engine
departed, which is a bit worrying for me.


Thanks


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Old 08-23-2005, 13:01   #7 (permalink)
Huw
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Re: 2.25 Diesel Blowing Oil


"evelyn snowling" <snowbobs@tiscali.co.uk> wrote in message
news:430b729e$0$383$cc9e4d1f@news.dial.pipex.com...
> Hope you are right Huw,
>
> Had the rocker cover off today it looks like the gasket wasnt sealing too
> good as it was leaking on part of it (front left corner looking towards it
> from the front) and as for the cap/filter its a bit loose so will try and
> replace that.
>
> I'm pretty much a novice when it comes to messing with engines but I'm
> going over to our local land rover specialist this week to get a full
> gasket set (including head gaskets) for the 2.25 as I gave all of the ones
> I had to the mechanic that fitted the 2.25 into the land rover in the
> first place. I'm also going to totally remove the oil cooler and will also
> drop the sump and make sure there are no fragments in there.
>
> Last time it started throwing out oil like this shortly after the engine
> departed, which is a bit worrying for me.
>



Whatever you do, resist the temptation to rebuild an engine that just
doesn't need it.
I actually analysed the oil in my Land Rover once, at about 5000 miles after
an oil change and some 35000 miles from new. It indicated excessive top and
bottom end wear and bore wear. Some 8500 hours and nearly 100,000 miles
later the engine is chugging along as well as it ever did, although oil
consumption has increased from around 2litres every 5000 miles of old to
around a litre every 1500 miles these days. The head gasket failed at around
95000 miles and some five years ago and there was very little wear on the
bores or valve gear although there may have been some piston wear that was
not particularly bad. I expect it to last a good while yet, or else I will
start to doubt the wisdom of paying a premium for the vehicle only 21 years
ago ;-)

Huw


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Old 08-23-2005, 14:01   #8 (permalink)
evelyn snowling
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Re: 2.25 Diesel Blowing Oil

Huw,
Indeed thats very true. but the way I look at it, If i get the gaskets and
dont use them I have them for if i do NEED them.
I'm also currently planning to start rebuilding a 2.25 petrol i have sitting
around albeit slowly with the plan to replace the 2.25 diesel with that
(landy was factory fitted as a petrol)

Thanks for your help. I'll be getting a new rocker cover cap/filter whilst
im over there and also the gaskets to retro fit the original side oil filler
onto it (i have one of the fillers in my garden)

Will let you know how she goes on a run after that.

Thanks


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Old 08-23-2005, 14:01   #9 (permalink)
JD
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Re: 2.25 Diesel Blowing Oil

evelyn snowling wrote:

> whats the simplest way to tell if its the rings gone?


Compression check - I think the manual gives the expected pressures.

(snip)
JD
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Old 08-23-2005, 15:01   #10 (permalink)
Richard Brookman
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Re: 2.25 Diesel Blowing Oil

so JD was, like...
> evelyn snowling wrote:
>
>> whats the simplest way to tell if its the rings gone?

>
> Compression check - I think the manual gives the expected pressures.
>
> (snip)
> JD


And don't forget to use a proper diesel gauge - compressions on a diesel
(even a knackered one) will blow a normal compression tester apart.

--
Rich
==============================
Disco 300 Tdi auto
S2a 88" SW
Tiggrr (V8 trialler)


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