2.25 Diesel Blowing Oil

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evelyn snowling

Guest
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


 

"evelyn snowling" <[email protected]> wrote in message
news:[email protected]...
> 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.


 
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,


 

"evelyn snowling" <[email protected]> wrote in message
news:[email protected]...
> 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


 
In message <[email protected]>
"evelyn snowling" <[email protected]> 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 [email protected]
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
 
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


 

"evelyn snowling" <[email protected]> wrote in message
news:[email protected]...
> 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


 
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


 
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
 
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)


 
Thanks Richard,

Will try and get my hands on a compression tester for the Diesel.

Thanks

Eve,
1959 SII SWB Basic
1967 SIIa SWB SW
1998 Disco 300TDI


 

"evelyn snowling" <[email protected]> wrote in message
news:[email protected]...
> Thanks Richard,
>
> Will try and get my hands on a compression tester for the Diesel.
>
> Thanks
>
> Eve,
> 1959 SII SWB Basic
> 1967 SIIa SWB SW
> 1998 Disco 300TDI
>

before doing a comp. test, i would strongly suggest you follow beamends
advice. take off the oil filler cap and get the motor running (don't worry,
it wont spew oil out of the filler, assuming all the baffles are in place in
the rocker cover). if you can see or feel a lot of gas being pushed out of
the filler hole, this signifies a significantly worn engine. most motors
will have a small amount of pressure so gauging what is "acceptable" is a
little subjective, but anyone with any motor experience (in particular
diesel experience) will be able to tell you wether it is concerning or not.
this is a lot easier than a comp. test and might save you a bit of time.

Cheers.

Sam.


 
On or around Wed, 24 Aug 2005 18:40:42 +1000, "Samuel"
<[email protected]> enlightened us thusly:

>
>"evelyn snowling" <[email protected]> wrote in message
>news:[email protected]...
>> Thanks Richard,
>>
>> Will try and get my hands on a compression tester for the Diesel.
>>
>> Thanks
>>
>> Eve,
>> 1959 SII SWB Basic
>> 1967 SIIa SWB SW
>> 1998 Disco 300TDI
>>
>
>before doing a comp. test, i would strongly suggest you follow beamends
>advice. take off the oil filler cap and get the motor running (don't worry,
>it wont spew oil out of the filler, assuming all the baffles are in place in
>the rocker cover). if you can see or feel a lot of gas being pushed out of
>the filler hole, this signifies a significantly worn engine. most motors
>will have a small amount of pressure so gauging what is "acceptable" is a
>little subjective, but anyone with any motor experience (in particular
>diesel experience) will be able to tell you wether it is concerning or not.
>this is a lot easier than a comp. test and might save you a bit of time.

If you unscrew the filler and the pressure blows it 2ft into the air, it's
excessive :)

If you can't get the lid back on again, it's really excessive...

--
Austin Shackles. www.ddol-las.net my opinions are just that
"Festina Lente" (Hasten slowly) Suetonius (c.70-c.140) Augustus, 25
 

"Austin Shackles" <[email protected]> wrote in message
news:[email protected]...
> On or around Wed, 24 Aug 2005 18:40:42 +1000, "Samuel"
> <[email protected]> enlightened us thusly:
>
> >
> >"evelyn snowling" <[email protected]> wrote in message
> >news:[email protected]...
> >> Thanks Richard,
> >>
> >> Will try and get my hands on a compression tester for the Diesel.
> >>
> >> Thanks
> >>
> >> Eve,
> >> 1959 SII SWB Basic
> >> 1967 SIIa SWB SW
> >> 1998 Disco 300TDI
> >>
> >
> >before doing a comp. test, i would strongly suggest you follow beamends
> >advice. take off the oil filler cap and get the motor running (don't
worry,
> >it wont spew oil out of the filler, assuming all the baffles are in place
in
> >the rocker cover). if you can see or feel a lot of gas being pushed out
of
> >the filler hole, this signifies a significantly worn engine. most motors
> >will have a small amount of pressure so gauging what is "acceptable" is a
> >little subjective, but anyone with any motor experience (in particular
> >diesel experience) will be able to tell you wether it is concerning or
not.
> >this is a lot easier than a comp. test and might save you a bit of time.
>
> If you unscrew the filler and the pressure blows it 2ft into the air, it's
> excessive :)
>
> If you can't get the lid back on again, it's really excessive...
>

if you park it under a gum tree and the koalas start choking and falling out
of the tree, it may be a little more than excessive.

Sam.


 
Sam, Certainly a little more than excessive as we are in the UK... dont see
many gumtrees or koala's here.


 

"evelyn snowling" <[email protected]> wrote in message
news:[email protected]...
> Sam, Certainly a little more than excessive as we are in the UK... dont
see
> many gumtrees or koala's here.
>
>

well, in your case, put it under a Oak tree and check for squirrels falling
out of the trees.

Sam.


 
On Tue, 23 Aug 2005 10:28:15 +0100, "evelyn snowling"
<[email protected]> wrote:

>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.

Does it leak a lot of oil elsewhere too?

My 2.5 n/a D used to be very heavy breathing. It also used to leak oil
out of every available gasket. If i replaced things like the rocker
gasket or the rubber slieve round the breather it would still manage
to push oil past them (or pop the breather out!).
It would always leak past the 3 rocket studs/bolts too! (whatever i
did to them!)

I rebuilt it with new rings (and new bearings while i was at it), and
it now it has much less pressure. The rocker bolts now seal without
any effort.
My engine is now (2 years later) still quite clean and the outside has
even gone rusty in places! (it never had a chance before!)

You could try cleaning everythig up and replacing the gaskets and
seals - but if it still leaks past them then its time to consider new
rings and a rebuild.

 
Just got myself Rocker Cover gasket and a new (second hand) 3 ring cap (it
only had a 2 ring one?) and put the rocker cover back on, All seems ok at
the moment, no pressure build up when I put my hand over the filler hole.
so... might all be OK now


Thanks again


 
JD wrote:
> evelyn snowling wrote:
>
>
>>whats the simplest way to tell if its the rings gone?
>
>
> Compression check - I think the manual gives the expected pressures.

Get a compression check done by a decent diesel mechanic who knows what
to expect from HIS guage. We have three diesel compression testers in
our workshop, and they all read differently - the most accurate one is
worth a couple of hundred pounds so you probably don't want to be buying
one.

--
EMB
 
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