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Oil leak dilemma
Topic Started: Wed Apr 4, 2012 2:53 pm (1,196 Views)
cornershop
Part of things
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Folks

The mot had picked up on a fairly major oil leak a few weeks ago but couldn't fail me on it apparently. MOT was done at MB uxbridge I believe, and they suggested it was either headgasket or RMS

Just back from getting a second opinion from CarswithStars in muswell hill and they couldn't say for certain one way or the other but suggested either the engine oil sump gasket or the RMS based on position o the leak; there is a leak from the h/g and rocker gasket but not enough to drip the amount it has been after a run. Having said that they haven't done an RMS on a 103 engine since they could remember ....

The engine oil sump suggestion through me a bit as I thought that was a fair bit more forward of where the leak is apparent (level with the back of the engine)

Will take a look on epc/wis to help understand the layout but has anyone got any suggestions? Wouldn't mind spending the money if I was guaranteed a fix but this is a bit finger in the air! The engine oil sump gasket didn't sound like a straightforward job either

Cheers
Shirish
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aemt
Serial 190E Owner
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I tracked an annoying leak down to the sump gasket even though the oil was dripping DOWN from the rear of the engine on to the exhaust.

Airflow and pressure were to blame.

Replaced engine mounts at the same time as replacing the sump gasket as the engine had to be lifted slightly anyway to do the sump.

Cured the leak and car ran smoother to boot.
Edited by aemt, Wed Apr 4, 2012 3:45 pm.
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viffer
V4 Power
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I'd clean the engine as best you can and try and find where it's leaking from first. And how much oil is needed every top-up? Should give you an indication on how much is being lost.
HTH
Viffer
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aemt
Serial 190E Owner
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viffer
Wed Apr 4, 2012 3:32 pm
I'd clean the engine as best you can and try and find where it's leaking from first. And how much oil is needed every top-up? Should give you an indication on how much is being lost.
HTH
Viffer
+1

Give it a good clean, top up oil first then take for long run.

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cornershop
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aemt
Wed Apr 4, 2012 3:13 pm
I tracked an annoying leak down to the sump gasket even though the oil was dripping DOWN from the rear of the engine on to the exhaust.

Airflow and pressure were to blame.

Replaced engine mounts at the same time as replacing the sump gasket as the engine had to me lifted slightly anyway to do the sump.

Cured the leak and car ran smoother to boot.
Interesting - was removing the engine sump a major job, cars with stars seemed to think so?

This was going to be my first port of call - somewhat similar to yours, the whole gearbox sump is wet with oil, presumably airflow etc. The more frequent smoke screens when pulling up at lights etc is getting on my nerves now!
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cornershop
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aemt
Wed Apr 4, 2012 3:46 pm
viffer
Wed Apr 4, 2012 3:32 pm
I'd clean the engine as best you can and try and find where it's leaking from first. And how much oil is needed every top-up? Should give you an indication on how much is being lost.
HTH
Viffer
+1

Give it a good clean, top up oil first then take for long run.

Yes a good idea, just unsure how I'd reach some of the areas underneath

Need to check for certain how much oil it's using. 0.5litre brought it up to half way point just unsure how much mileage I've covered since. Will baseline it at half way on the dipstick and confirm
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aemt
Serial 190E Owner
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I had a friend do it for me.

Had to lift the engine slightly to get the sump cover off.

Symptoms are same. Somehow the oil got lifted up into the car behind the engine and lodged there until you braked.

Then smoke everywhere until it burnt off on the exhaust.

New sump gasket cured it for me.

Do clean the sump thoroughly and take it for a drive first thought to confirm where the oil is coming from.

I am sure someone with more expertise will be along shortly to explain the process of replacing the sump gasket.
Edited by aemt, Wed Apr 4, 2012 4:29 pm.
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cosser
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I've bumped a previous post of mine,it's the Wis guide " sump removal 201..engine in situ"..didn't show me a link,sorry.

Cosser..!!
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cornershop
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Thanks cosser, not a small amount of work then!
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Joe90
Newbie
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Pardon my ignorance, what does RMS stand for?
I'm new to this and going to change my sump gasket and the engine mounts.
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Richy190E
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Rear Main Seal (usually, correct me if that's not the case in this instance) it's the seal which the tail end of the crankshaft runs through.
Edited by Richy190E, Sun Apr 8, 2012 8:44 pm.
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cornershop
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Richy190E
Sun Apr 8, 2012 8:41 pm
Rear Main Seal (usually, correct me if that's not the case in this instance) it's the seal which the tail end of the crankshaft runs through.
The very same Richy
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Joe90
Newbie
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Thanks guys. Got myself an engine hoist. I am going to change the sump gasket and the crankshaft seal. Might do the engine mounts at the same time.

My knowledge is very limited. (i'm in IT support) so far i have done the usual oil, filter replacement front and rear brakes, air filter, plugs, ht leads (broke one while changing plugs)
This is a great site to learn on. Wife is getting upset with me for spending too much time here!
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cornershop
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Joe90
Sat Apr 14, 2012 8:55 am
Thanks guys. Got myself an engine hoist. I am going to change the sump gasket and the crankshaft seal. Might do the engine mounts at the same time.

My knowledge is very limited. (i'm in IT support) so far i have done the usual oil, filter replacement front and rear brakes, air filter, plugs, ht leads (broke one while changing plugs)
This is a great site to learn on. Wife is getting upset with me for spending too much time here!
Well done you for getting stuck in, ive managed to change the OVP and Fuel pump relay ..... oh and i've changed the head light bulbs too!

I'm getting someone to do the mounts and oil sump gasket, better safe than sorry with my skills! Be good to hear how you get on.

I've no guarantee this will fix my leak, however he's charging less (£250) for oil sump gasket change than RMS (450 ish), so trying sump first
Edited by cornershop, Sat Apr 14, 2012 2:11 pm.
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Joe90
Newbie
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Can someone clarify this for me please.
The sump gasket seems to be made of some card like material. Do i need to apply some silicon sealent to the metal surfaces of the engine and the sump?
Thanks
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cornershop
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Happy to say this is now resolved - was the oil sump gasket in the end.

Got a very good merc merchanic in neasden to do it for me whilst he completed a major service on it.
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