V6 Cam shaft seals & Crankshaft seal ?

[g8dhe]

Thinking about getting our Cam shaft seals replaced as the oil leak from them appears to be getting significantly worse.

I notice however that a couple of people have suggested that it is worth getting the Crankshaft seal done at the same time as its been known to fail a short time after having Cam shaft seals done, is there any mechanical reason for this or simply age of the seals?

I may also get the water pump replaced and I expect the Cam belt will need removal and hence a replacement of that and the tensioner, is there anything else worth doing whilst the garage have Minnie opened up at the front ?

Having had a quick look around yesterday for sources of the V6 Cam seals I couldn't find any listed so does anybody know of any current sources other than Mazda dealers ?

[mikeWalsall]

According to the paperwork my V6 cam belt was changed on import around three years ago ...

When I had her converted to LPG I asked Paul at lpgimporters (who did the conversion) to give her a check over for me .... one of the things he pointed out was the cam seals where leaking oil to the extent the previous UK only owner (or garage ??) had put some straw like absorbent stuff on the under body shield to catch it ..!!

Point is ... if it is a known problem why can't the dealer / importer be efficient / ethical and change them as part of the cam belt change ...??

My lads / grandsons are always messing about with motor bikes / quads /cars ... for bearings / oil seals I use a very good .. local to .. me industrial bearings / seals supplier (http://www.bthbearings.co.uk/) but similar companies are in most towns (Yellow Pages??) ..

The only downside is that I have to take a seal /bearing with you for cross reference purposes .. but .. particularly with the influx of cheapo Chinese parts ... you tend to get a proper / higher 'industrial' quality / specification parts than using motor factors 'pattern' parts .. ie not genuine Mazda..

[g8dhe]

Just realised Ian does have the Cam Shaft seals in the BF shop but listed under Other. He also has V6 Crank Oil Pump Seal is this what people are referring to as Crank Shaft seal ? I would have thought them to be a bit different?

[mikeWalsall]

Should be Part number 10-602A..

[Ian]

Should be Part number 10-602A..

Yes, these are the ones we stock. Are they mis-titled?

[mikeWalsall]

[g8dhe]

Ah I see yes that's the part - JE1510602A, also makes sense its both the Oil Pump and the Crankshaft seal if I'm understanding the layout correctly (give me electrons any time!).

Ian: No I don't think so, having now looked at the Lush diagrams, the Oil Pump sits at the front of the Crankshaft (behind the Crankshaft pulley ?) and hence the seal is both the Crankshaft seal as well as the Oil Pump seal, I was just expecting it to be one or the other hence the title confused me as it says Crank Oil pump !

[g8dhe]

Ian, when you had the problems with your V6 and the seals, the part that broke off the cylinder head, was that due to wear and tear or just poor handling when it was removed? I'm wondering if I should mention to the garage that they need to undo that part carefully ? (The garage we use do work on several Bongo's but I'm not sure that I would classify them as Bongo specialists!)
http://lushprojects.com/bongopartsmk2/c ... o=.html#31

[Grahame at work]

I had my V6 camshaft seals done when I had the belt changed last year.

This was carried out by a well respected Bongo specialist but I was left rather confused. I still am but it is entirely my own fault that I never resolved the confusion – basically its running fine and I don’t have any problems so I have been lazy and not pursued it with either the Bongo master (Ian) or the garage.

I ordered all my components from the Bongo shop and the camshaft seals consisted of 2 pairs – for what I understood to be for an inlet and outlet cam on each side. I think I confirmed the part numbers on Lushprojetcs before ordering with Ian.

When I picked up the Bongo I was told I had given them one too many seals – and they handed one back to me.

When I got home I spent a while checking numbers and initially I thought that the numbers on Lushprojetcs may be wrong and that one of the part numbers I got from Ian was in fact for the oil pump seal. This thought was sparked by a slightly different set of part numbers on a seals suppliers web site (I can’t remember which one just now and sitting at work its difficult to look it up).
However, when I compared those part numbers with the one I was handed back it was not the one that fitted that scenario – so even more confusion. I sent a message to Ian asking him about it but unfortunately he was away at the time and he said he could look into it on his return to Bongo Towers. I then went away on holiday and by the time I got back to thinking about it several weeks had passed and as I said I just never got around to taking it up with Ian again.

I wonder if the mechanics actually doing the work for what ever reason found it too difficult to replace one of the seals – which seems rather odd / unrealistic but there again so does the Bongo shop having the wrong parts as I am sure plenty of folk / garages have done this work and nobody else has reported any issues. Have they

The garage had dropped the whole engine out to do this work and I didn't want to re-do that just to look at what had been done and I didn't fancy taking the covers off in-situ either - as I said its running fine so I don't want to disturb things.

of Aberdeen

[mikeWalsall]

Never removed any cam seals on the Bongo (yet) ..

On most engines. external oil seals they can easily be removed and replaced in a minutes.. It's getting to them which takes the time ...

After measuring the position / depth I tend to hook them out ...



... or screw a self tapping screw in and pull them out with pliers ...

I would not have thought you would have to drop the V6 engine to do a cam belt / crank /cam seal job ..??

[dandywarhol]

A common cause of leaking seals is a blockage in the engine breather system - best get it thoroughly checked or the new seals could leak again.

I've also used a product called seal swell which effectively rejuvenates hardened seal lips

http://www.forteuk.co.uk/product.php?id ... onditioner

[g8dhe]

How is that applied ? Just added to the oil or what ?

[mikeWalsall]

An after market oil additive ... you can get similar stuff for auto gearbox / power steering tranny fluid ..

http://www.halfords.com/webapp/wcs/stor ... yId_255219

[g8dhe]

Its just that the one in the link appears to have a nozzle like a silicone filler type as though its to be injected/spread around the seal, rather than a liquid to be poured in to the oil itself ?

[mikeWalsall]

With 'normal' oil you add it into the engine / manual gearbox / back axle.....

Likewise ..with the auto fluid type you add it into auto boxes ... or into the power steering reservoir ..

On old motor bikes I have found that the old mineral (dinosaur) oil is usually OK ...using fully synthetic oil it tends to 'search' out leaks on any 'iffy' seals (bit like anti freeze susses out bad hoses / joints) ..