Oily bonnet
Oily bonnet
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Discussion

Demondad

Original Poster:

482 posts

239 months

Friday 18th May 2012
quotequote all
Just got back from a 30 mile run out and have noticed spots of clean oil on underneath of bonnet and top of fuel rail/ front rad cover panel. Looks like its from passenger inside the V around front inlet area. Just had 12k service. Could it be poorly sealed/loose cam cover with the leak spraying up off alternator?

Thoughts appreciated, I'll be dropping her back to garage to get their verdict next week but just would like some ideas.

Gonna let oil settle and check levels ok, she ran beautifully though! On my birthday too, I spoke too soon!!!

Tanguero

4,535 posts

225 months

Friday 18th May 2012
quotequote all
Certainly sounds like a cam cover leak.

Nickccc

1,682 posts

272 months

Friday 18th May 2012
quotequote all
First place to check would be the breather pipe coming off the front of the engine to the drivers side air box and the oil cap.

Demondad

Original Poster:

482 posts

239 months

Friday 18th May 2012
quotequote all
I will get a look at that breather pipe, it seems odd it's only been since the service. Cheers guys, speedy response!!

Demondad

Original Poster:

482 posts

239 months

Friday 18th May 2012
quotequote all
Defo not the breather pipe. Can the alternator drive seal leak lots of oil? The oil level not looking too good!! But will let oil settle before I make a true check. Me thinks a visit to the garage tomorrow for a chat.

Nickccc

1,682 posts

272 months

Friday 18th May 2012
quotequote all
I think it can. Seem to remember a thread about it on here.
Guess cleaning it off then running whilst having a look is going to pin point the leak.

Demondad

Original Poster:

482 posts

239 months

Friday 18th May 2012
quotequote all
Think that's a good start Nick, it's definitely gonna need cleaning up however hard it is to get too. Don't fancy the danger of all the oil cooking in the V!!

I assume the alternator drive shaft seal can be replaced in situ??!! Probably a stupid question being a Tiv

ridds

8,366 posts

268 months

Friday 18th May 2012
quotequote all
Check for a cracked cam cover. The 4.2 has this issue due to the way the inlet manifold mounts.

APMAUTO

368 posts

290 months

Friday 18th May 2012
quotequote all
ridds said:
Check for a cracked cam cover. The 4.2 has this issue due to the way the inlet manifold mounts.
second that spacers are fitted on the cam covers where the manifolds bolt to if missing can cause the boss on the cover to crack

matty1275

190 posts

175 months

Friday 18th May 2012
quotequote all
sounds a bit daft, but was the dipstick fully back down?

mine spat some oil drops out previously when the dipstick wasn't properly down.
the engine breather was a bit gunked up and it was pressurising a bit

Nickccc

1,682 posts

272 months

Friday 18th May 2012
quotequote all
The problem certainly seems to have occurred after the service so maybe it's not the oil seal, as that would be unlikely to fail so suddenly?
Since Andy and Ridds have both mentioned the cam covers and they have been removed and refitted it does seem too much of a coincidence. It certainly wouldn't be the first time a fault has been caused after work, the amount of stuff I have had to rectify after work is crazy and why I will do all minor bits myselfe now. Yes there are credible and trusted places that know the cars inside out, but there are also places where it's just another car to turn round.

scotty_d

6,795 posts

218 months

Saturday 19th May 2012
quotequote all
My was losing last year a litre every 300 miles due to the cam cover having a bad seal the V was full of oil when i pulled it apart. re-sealed them and it has used 300 ml of oil in 1000 miles now I would run your hand along the edge of the cover to see if the oil is coming out of them.

Demondad

Original Poster:

482 posts

239 months

Saturday 19th May 2012
quotequote all
Cam cover looks the most likely having had a good look. Interesting about the cracking occurring so I'll get that checked too. The garage are going to take it back in for a look next week, and do the mend if associated with the 12k service. Im pretty good with spanners and I do have to agree with your thought Nick, it's simpler to DIY.

Thanks for all your advising I will let you know the outcome.

Demondad

Original Poster:

482 posts

239 months

Monday 18th June 2012
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Update on this thread:

The leak has got slowly worse and having been back to the garage the mechanic is fairly certain it is the alternator drive oil seal, and not due to a mishap from the service. Has anyone on here had to replace one of these, and if so is the seal difficult to pull out? Is there a 'right' method for pulling out an oil seal?

I can confidently remove the fuel rail, alternator and other gubbins that are in the way, but due to the awkward position of the seal, I know it will not be a walk in the park. Think I might as well get the water temp gauge done while doing all this too, the only benefit of doing this in the summer is the long warm evenings!

ridds

8,366 posts

268 months

Monday 18th June 2012
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Never heard of a leak from there. Can you take a picture and post it up.

Should be able to confirm or not.

Demondad

Original Poster:

482 posts

239 months

Monday 18th June 2012
quotequote all
Here are some before and after, not sure its that easy to figure where the leak is but it sprays up from the alt belt to the bonnet and front panel, and it can be seen in a pool in the V.
Before

After

ridds

8,366 posts

268 months

Monday 18th June 2012
quotequote all
What a mess. Surprised there's not more on the belt, particularly the front edge as the oil would spill out of the seal and onto this area.

Demondad

Original Poster:

482 posts

239 months

Monday 18th June 2012
quotequote all
Yes its strange the belt looks dry but then its whizzing round and spraying oil up the bonnet I guess it keeps "clean". I reckon I'm going to have to get it all apart to clean it up anyway but I'm reluctant to go to the trouble of trying to remove the seal if the leak is one of the cam covers. Do you think a cam cover can leak that much in a 15 mile journey?

longbow

1,610 posts

259 months

Tuesday 19th June 2012
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Is it just my eyes playing tricks on me, or does the flange that supports the lower drive pulley bearing have a crack in it?

Demondad

Original Poster:

482 posts

239 months

Tuesday 19th June 2012
quotequote all
Arghhhhh I hope not. I'll check it tonight.