Aux belt flapping and making a deep rumbling noise
Moderator: RichardW
Re: Aux belt flapping and making a deep rumbling noise
I don't have a compression tester and getting one that is suitable for measuring diesel compression might be a challenge. Nevertheless I will try to do a compression test. I had arranged for the alternator clutch pulley to be tested on the car first before I buy it. If it solves the belt flapping issue I will buy it happily.
Being under the car today I noticed a another slight issue. The slight oil leak that I had seems to be mostly coming from the head gasket on the back side of the engine.
Now its not a big leak and the car almost never drips oil on the ground and when it does its mostly a coin sized blob at the most. I know that XUD's can go on for ages with this type of a leak and they are somewhat known for leaking oil at higher mileages. I am however afraid that oil can find a path into the cam belt area which might contaminate the belt. I have no symptoms of HG failure, no overheating even in the scorching hot summers around here while going uphill with the ac on full blast. No coolant use, no over pressure in the cooling system, etc.
What it your advice?
Would a rather comprehensive job on the engine (head off, new head gasket, valve guides, etc. ) stands a chance at sealing it cause I hate leaking engines. To my knowledge the head has never been of the engine. The whole job above might only cost about 100 to 150 euros around here and I got to know a brilliant independent mechanic that knows french cars like the back of his hand (and he drives a Renault Laguna himself which does tell a lot ). I think that he will do an admirable job though I am not sure whether is worth doing only due to the slight oil leak.
Being under the car today I noticed a another slight issue. The slight oil leak that I had seems to be mostly coming from the head gasket on the back side of the engine.
Now its not a big leak and the car almost never drips oil on the ground and when it does its mostly a coin sized blob at the most. I know that XUD's can go on for ages with this type of a leak and they are somewhat known for leaking oil at higher mileages. I am however afraid that oil can find a path into the cam belt area which might contaminate the belt. I have no symptoms of HG failure, no overheating even in the scorching hot summers around here while going uphill with the ac on full blast. No coolant use, no over pressure in the cooling system, etc.
What it your advice?
Would a rather comprehensive job on the engine (head off, new head gasket, valve guides, etc. ) stands a chance at sealing it cause I hate leaking engines. To my knowledge the head has never been of the engine. The whole job above might only cost about 100 to 150 euros around here and I got to know a brilliant independent mechanic that knows french cars like the back of his hand (and he drives a Renault Laguna himself which does tell a lot ). I think that he will do an admirable job though I am not sure whether is worth doing only due to the slight oil leak.
Re: Aux belt flapping and making a deep rumbling noise
You sure it's not the rocker gasket? They leak for fun and are a doodle to change.
I've never seen a healthily running Xud9 leak oil from the head gasket.
I've never seen a healthily running Xud9 leak oil from the head gasket.
Re: Aux belt flapping and making a deep rumbling noise
It certainly looked like the head gasket. The exhaust manifold above it seemed to be bone dry. The rocker gasket is somewhat suspect and I might have a go at changing it. However do I need to also put silicone sealer on the new gasket? Some say it will seal better that way.
Re: Aux belt flapping and making a deep rumbling noise
I never did on any of mine, it might be worth a bit in the corners as they go straight into a curve and thats the bit that seems to go.
If you are leaking oil from the HG the uneven combustion theory seems more credible.
If you are leaking oil from the HG the uneven combustion theory seems more credible.
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Re: Aux belt flapping and making a deep rumbling noise
Leaking oil from the head gasket is possible, the feed to the rockers goes pretty close to the corner and usually leaks out there, not a common problem though, much more likely to be the valve cover, crankcase pressure overcoming the gasket.
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
Re: Aux belt flapping and making a deep rumbling noise
Today I had a go at investigating the oil leak. I took out the inter cooler and to my surprise it was nearly bone dry. It only had the slightest amount of oil inside. Nevertheless I gave it a good wash with a degreaser both inside and out. The rocker cover gasket seemed somewhat suspect so I bought another one and got it on the engine. Started her up, took her for a decent test drive, no leaks, yay. So much for the good news.
Now, the bad news:
The head gasket is definitely leaking oil. It seems to the be the back of the engine right on the very corners just as Gibbo2286 mentioned. Now its not a huge leak, likely not even a major one as the car doesn't seem to lose oil noticeably nor it drips often on the ground when parked. For now I will just ignore it or maybe that's not so wise choice?
The alternator clutch pulley test will be done on Friday morning even if I hoped it will be today. In the mean time I will avoid keeping the revs in the 'resonance range' which seems to be from idle up to 1300 rpms or so.
Bit of an advice on oil suitability for an XUD. As I plan to change the oil soon, is Total Quartz 7000 Diesel 10W-40 oil suitable for an XUD? It says synthetic based or maybe it should be better if I stick with a mineral oil?
Now, the bad news:
The head gasket is definitely leaking oil. It seems to the be the back of the engine right on the very corners just as Gibbo2286 mentioned. Now its not a huge leak, likely not even a major one as the car doesn't seem to lose oil noticeably nor it drips often on the ground when parked. For now I will just ignore it or maybe that's not so wise choice?
The alternator clutch pulley test will be done on Friday morning even if I hoped it will be today. In the mean time I will avoid keeping the revs in the 'resonance range' which seems to be from idle up to 1300 rpms or so.
Bit of an advice on oil suitability for an XUD. As I plan to change the oil soon, is Total Quartz 7000 Diesel 10W-40 oil suitable for an XUD? It says synthetic based or maybe it should be better if I stick with a mineral oil?
Re: Aux belt flapping and making a deep rumbling noise
I used 10w40 a3/b4 semi syntheric in mine.
The totals over spec but quite auitable as far as I'm aware.
I'd avoid mineral oil peraonally.
The totals over spec but quite auitable as far as I'm aware.
I'd avoid mineral oil peraonally.
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Re: Aux belt flapping and making a deep rumbling noise
Why?
I've been using 10w/40 diesel fleet oil in all my vehicles for years and never had a problem...
Specifically, I use the stuff that comes in 2ol drums from Costco...
I now have enough in stock to last me for several years at current consumption rates!
Jim
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Re: Aux belt flapping and making a deep rumbling noise
I experimented when I started doing my own servicing and I think semi synthetic runs smoother.
That's why it's personally, I don't know of any evidence to say that mineral oil isn't good, I just prefer semi synth.
That's why it's personally, I don't know of any evidence to say that mineral oil isn't good, I just prefer semi synth.
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Re: Aux belt flapping and making a deep rumbling noise
But you do not have many cars with modern DPF and it's related Anti-Pol systems Jim....
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Re: Aux belt flapping and making a deep rumbling noise
That's fair dos... I know that differing oils do indeed seem to run differently... I have noticed same myself...
I always remember back years ago the old green Duckhams 'Q' 20/50 oil made BMC A Series engines run as rough as guts... They much preferred Castrol GTX...
Jim
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Re: Aux belt flapping and making a deep rumbling noise
Stickyfinger wrote: ↑02 Aug 2017, 10:52 But you do not have many cars with modern DPF and it's related Anti-Pol systems Jim....
Not many Alasdair but I use it is Sian's Pixo and my 207 without issues
The only car I can't is Robyn's C1 as that needs 5w/30...
For that I have a small drum of 5w/30 fleet oil
Jim
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Re: Aux belt flapping and making a deep rumbling noise
Been using Castrol 15/40 in my old XUD - changes every 6000 miles. In the HDI with DPF its 10/40 semi
Simon
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Re: Aux belt flapping and making a deep rumbling noise
I just use what the handbook recommends in my current C5 it's Total Quartz 5-30
I think modern engines need what the maker decided was best, they after all did the testing alongside the oil compNY.
Back in the day, from about 1956 I always used BP Visco-static or for the bangers Duckhams Q 20/50, prior to that it was simple 20 or 30 or 40 depending on how worn the engine was.
I think modern engines need what the maker decided was best, they after all did the testing alongside the oil compNY.
Back in the day, from about 1956 I always used BP Visco-static or for the bangers Duckhams Q 20/50, prior to that it was simple 20 or 30 or 40 depending on how worn the engine was.
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.