Difficult to trace oil leak!

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Difficult to trace oil leak!

Postby BBAV » Wed Aug 03, 2016 9:55 pm

Hi,
My 1.8 MK2 10AE has developed an oil leak and is baffling the mechanic at my local garage as he cannot see where it is coming from. It runs down the front of the engine behind the belt pulleys. I took the Cam cover off in March this year to have it polished, I made sure the surfaces were clean and fitted a new gasket (I'm not a mechanic) the garage thought maybe I had damaged it so another new gasket was fitted by them, and we still have the leak.
The garage are suggesting removing the engine but I feel that's a bit drastic at this stage, do any of you mechanics out there agree with that or are there other alternatives to try before resorting to an engine out.

Anyone any suggestions or anyone been unfortunate to have experienced a difficult to find oil leak, and what did it turn out to be.

Regards to all.

BBAV
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Re: Difficult to trace oil leak!

Postby drumtochty » Wed Aug 03, 2016 11:01 pm

This can happen if you do not use a Mazda original gasket and if you do not put a gasket sealer at the corners of the cam cover and on the underside of the humpy bits of the cam cover.
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Re: Difficult to trace oil leak!

Postby joeytalent » Thu Aug 04, 2016 7:26 am

What about the camshaft seals?

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Re: Difficult to trace oil leak!

Postby drumtochty » Thu Aug 04, 2016 8:29 am

Yes those front seals on the cam can do that!
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Re: Difficult to trace oil leak!

Postby joeytalent » Thu Aug 04, 2016 2:26 pm

They're good fun to replace as well! :lol:
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Re: Difficult to trace oil leak!

Postby drumtochty » Thu Aug 04, 2016 5:12 pm

Would you use that cambelt again as you have to take it off the pulleys.

Therefore you are doing the complete cambelt and then you need a cam cover gasket again!

Happy days.
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Re: Difficult to trace oil leak!

Postby joeytalent » Thu Aug 04, 2016 5:26 pm

drumtochty wrote:Would you use that cambelt again as you have to take it off the pulleys.

Therefore you are doing the complete cambelt and then you need a cam cover gasket again!

Happy days.


If you're going to all that effort, may as well change the waterpump as well!
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Re: Difficult to trace oil leak!

Postby BBAV » Thu Aug 04, 2016 9:28 pm

Thanks Drumtochty and joeytalent for your suggestions re my oil leak.

I spoke to my local garage mechanic today and he is going to get a Mazda cam cover gasket and cam front seals, then we will see where we go from that.

But now I see you guys are talking about replacing the cam belt and water pump.
This oil leak could end up being a bit expensive.!!

I'll keep you updated how things are going.

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Re: Difficult to trace oil leak!

Postby joeytalent » Thu Aug 04, 2016 9:56 pm

Ah, we only suggest that because you're going to have to take the cam belt off to replace the cam from seals - makes sense to do it at the same time. Seeing as the cam belt is coming off and going back on, may as well replace it at the same time - it should only cost a tenner or so more!
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Re: Difficult to trace oil leak!

Postby drumtochty » Thu Aug 04, 2016 11:52 pm

How many miles has it done and do you know when the last time or mileage that the belt was changed.

At that age it should be on it's second cam belt and at the second belt change it is recommended to change the water pump and gaskets.

Therefore if the water pump not been done, it is time for a water pump change as the original impellors may be plastic.
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Re: Difficult to trace oil leak!

Postby BBAV » Fri Aug 05, 2016 8:37 pm

Hi,
No progress today as awaiting the parts coming via Mazda dealer, including new cam belt.

Car has done 91K. I have lots of invoices and receipts for the car from previous owners which I will look through to see I can find out when the cam belt was last changed.

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Re: Difficult to trace oil leak!

Postby joeytalent » Sat Aug 06, 2016 8:53 am

Should have been changed at 60k miles [THUMBS UP SIGN]

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Re: Difficult to trace oil leak!

Postby BBAV » Sat Aug 06, 2016 11:48 am

I have found among the past service receipts the cam belt was changed at 63K that was in 2006, then in 2010 a new water pump was fitted and all the belts were replaced at the same time, the mileage then was 75K.

So it would appear that the previous owners have looked after it faithfully.
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Re: Difficult to trace oil leak!

Postby OldSpice » Sun Aug 07, 2016 4:49 pm

Steam clean the block, and then watch for a "fresh" leak.
Obviously, seal off electrical stuff with cling film.
Any seasoned mechanic would or should know that.
Precisely the reason to be cautious buying an old car with a freshly..... wait for it......steamed engine bay. :wink:
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Re: Difficult to trace oil leak!

Postby joeytalent » Mon Aug 08, 2016 9:05 pm

OldSpice wrote:Steam clean the block, and then watch for a "fresh" leak.
Obviously, seal off electrical stuff with cling film.
Any seasoned mechanic would or should know that.
Precisely the reason to be cautious buying an old car with a freshly..... wait for it......steamed engine bay. :wink:

Problem is you can steam the front of the block all you like, but if it isn't the rocker cover gasket then you won't see where it's coming from, unless you can somehow get the covers off as well.
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Re: Difficult to trace oil leak!

Postby drumtochty » Mon Aug 08, 2016 10:39 pm

Aye apart from those in Falkirk!
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Re: Difficult to trace oil leak!

Postby OldSpice » Tue Aug 09, 2016 5:10 pm

drumtochty wrote:Aye apart from those in Falkirk!


:shock:
Cheeky jobby! I know where you live :lol: .
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Re: Difficult to trace oil leak!

Postby BBAV » Wed Aug 10, 2016 11:02 am

Hi,
Got the car back on the road yesterday and it looks like the oil leak has been cured.
No matter how much cleaning off, of the front of the engine was done, then with the engine running and waiting for the oil to appear we could not see where it was coming from.
So with the cam cover off and all the front covers and belt pulleys removed then the plate behind them off, it looked like the cam seals were the obvious culprits.

I took your advice and bought an original MAZDA cam cover gasket, which by the way even feels a different quality from other brands, and fitted it with gasket sealer this time.
Also refitted new cam seals and a new belt, and after taking the car for a nice gentle run last night there is no oil on the floor this morning. :D

Thanks once again to you drumtochty, joeytalent, and Oldspice for your help and advice.

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Re: Difficult to trace oil leak!

Postby Telly Addict » Wed Aug 10, 2016 12:21 pm

A happy ending, nice! 8)
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Re: Difficult to trace oil leak!

Postby drumtochty » Wed Aug 10, 2016 3:18 pm

Sorted!
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