Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: ClarCE on 12 March 2007, 10:52:20
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Right then,
I just want to get this confirmed, and perhaps if this is right (or even if it isn't in which case I will edit them) they could be added to the cam cover changing guide so this will be clear in the future - I think it would be beneficial as putting the right amount of sealant in the right place is so critical to this job..
Anyway, please confirm the following:
Front of Cam
(http://i164.photobucket.com/albums/u24/ClarCE/frontcam.jpg)
Rear of Cam
(http://i164.photobucket.com/albums/u24/ClarCE/rear.jpg)
Cheers in advance,
Chris.
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Hi Chris,
I'm sorry to hear about your woes on this - I know what a pain it is to do once..
I'm not sure about your description of the goo locations at the front. I applied the stuff in the angle where the seal goes from horizontal to curving upwards to go over the camshaft bearings (4 spots on each side). You seem to be showing putting it at the outside corners of the cyclinder head - may not do any harm, although I'm not sure it does any good, but I think you do need to get it in the angles above
At the rear I put it all around the curved half moon and a bit to each side - pretty much as you show.
I think the principle is to get the areas where the seal goes through a sharp angle vertically and is therefore most likely to leak.
I'm open to correction of course!
Chris - time allowing I'm happy to help with this.
Cheers,
Ian
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Next time I do some I will take a pic.....
I place a pea size blob of sealent at every tight bend (4 per gasket) so that when squashed by the gasket it covers both edges of the bend...if that makes sense!
So, your last picture of the rear half moon is a bit wrong as the sealent needs to seal 5mm of the inside radius and 5mm or so of the metal leading to it...
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In fact, I have some spare heads so will pop some sealent on them in the correct positions tonight and take a pic....
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Hi Chris,
I'm sorry to hear about your woes on this - I know what a pain it is to do once..
I'm not sure about your description of the goo locations at the front. I applied the stuff in the angle where the seal goes from horizontal to curving upwards to go over the camshaft bearings (4 spots on each side). You seem to be showing putting it at the outside corners of the cyclinder head - may not do any harm, although I'm not sure it does any good, but I think you do need to get it in the angles above
At the rear I put it all around the curved half moon and a bit to each side - pretty much as you show.
I think the principle is to get the areas where the seal goes through a sharp angle vertically and is therefore most likely to leak.
I'm open to correction of course!
Chris - time allowing I'm happy to help with this.
Cheers,
Ian
Hi Ian,
Cheers for that - I've got a new cover turning up tomorrow with gaskets for the passenger side, drivers side (touch wood) appears to be holding.. So when I get back from SLady bitshorpe with my elite wheels I'll be having a third (and hopefully final) crack at it..
As for the locations, that gasket does some weird and wonderful stuff as it turns to go over the bearings, I didn't put it where it starts to go vertical, however I did use rather 2 rather large blobs each side where it does its right angles before going vertical - its possible that some of it would have pushed its way up there as I did put a fair bit on - rather than the stupidly small smear I used first time round!
Cheers,
Chris.
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In fact, I have some spare heads so will pop some sealent on them in the correct positions tonight and take a pic....
Mark you're a star, that would be most appreciated!
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I must add that I also put small dabs on the gaskets after they have been inserted into the covers in the same positions also....just to make sure!
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I still reckon you got a cover warped...
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Chris,
One thing - did you change the small o-rings around the bolt holes? Mine were rock hard.
Cheers
Ian
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I still reckon you got a cover warped...
Me too James, new one should be here tomorrow with a bit of luck.. Seeing as some of the bolts on passenger side were seriously over tight, and some were half hanging out then it would be a miracle if it wasn't warped!
Ian - yep, changed the o-rings, twice now!
Cheers,
Chris.
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well here's a pic ... can't say where from though ;)
(http://i42.photobucket.com/albums/e327/n0ddy/miggy/2b351bbb.png)
cross-hatched areas are where the sealant goes ...
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Nobody has mentioned it yet, BUT, when I did my covers, I changed 16 '0' rings, I put a spot of black sealant on them, to hold them in place... has anyone else done this or is there another way of doing this?????
DC
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Nobody has mentioned it yet, BUT, when I did my covers, I changed 16 '0' rings, I put a spot of black sealant on them, to hold them in place... has anyone else done this or is there another way of doing this?????
well there's 4 sort of spikes in the round recess where they sit which hold the o-rings in place, they don't drop out when you turn the cover right side up if you push them into position - well not when I've done them anyway :)
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Mine were the correct part numbers, BUT, they seemd very slightly too small, hence the assistance from the Black Goo! When I had cause to take the covers off again they were all well in place, often wondered if they were actually the right size..
DC
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I used a dab of grease to hold them in , then turned it upside down and gave it a good shake to make sure they wouldn't drop out anywhere embarrassing.
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Ok, front cam cap.....
(http://i23.photobucket.com/albums/b394/Marks_DTM_Calib/IMG_0904.jpg)
Rear half moon....
(http://i23.photobucket.com/albums/b394/Marks_DTM_Calib/IMG_0905.jpg)
You dont realy need the smear around the surface of the half moon but, its a good spot to clean your finger....
Note, its not the right sealent....it should be black but, my black sealent went walkies at the cambelt party..... :(
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Thanks Mark, that is excellent - big help, I think I've probably gotton away with it on the drivers side, passenger side still leaking into the plug wells, so more than probable that the covers warped - new one tomorrow, then all should be well after another allnighter :D Although one side should take me a lot less time!
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Ok, front cam cap.....
(http://i23.photobucket.com/albums/b394/Marks_DTM_Calib/IMG_0904.jpg)
Rear half moon....
(http://i23.photobucket.com/albums/b394/Marks_DTM_Calib/IMG_0905.jpg)
You dont realy need the smear around the surface of the half moon but, its a good spot to clean your finger....
Note, its not the right sealent....it should be black but, my black sealent went walkies at the cambelt party..... :(
I think that ended up at Tunnies when they did Loo-Knees gaskets
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can i ask if its good pratice to let the goo go off for 15/20 mins as it seems to hold the gasket/ 1/2 moons to stick in place.....i ended doing this on my 2.2 as the 1/2 moon kept dropping off the cam cover? :-/ just wondering and might help Chris
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The sealant I got from Vx is P/N 90485251. However according to EPC:
90485251 - COMPOUND,SEALING,50 ML,OIL PUMP TO CYLINDER BLOCK
90094714 - CYLINDER HEAD COVER AND GASKETS - SEALING COMPOUND (NLS.- USE 90542114 15 03 170)
So which is it then...? 90485251 or 90094714?
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The sealant I got from Vx is P/N 90485251. However according to EPC:
90485251 - COMPOUND,SEALING,50 ML,OIL PUMP TO CYLINDER BLOCK
90094714 - CYLINDER HEAD COVER AND GASKETS - SEALING COMPOUND (NLS.- USE 90542114 15 03 170)
So which is it then...? 90485251 or 90094714?
According to that it's 90542114 but I've just looked at mine and it's 90485251. It's deffinately black and rubbery when set.
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The sealant I got from Vx is P/N 90485251. However according to EPC:
90485251 - COMPOUND,SEALING,50 ML,OIL PUMP TO CYLINDER BLOCK
90094714 - CYLINDER HEAD COVER AND GASKETS - SEALING COMPOUND (NLS.- USE 90542114 15 03 170)
So which is it then...? 90485251 or 90094714?
I was sold and used 90485251 black goo......i might be wrong but the 90094714 might be the green snot that shouldnt be used.
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Isn't the green stuff for use on metal to metal seals? (less flex needed than plastic/rubber - alloy)
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Also, I am guessing that 'NLS' stands for No Longer Supplied (or something similar) - so the plot thickens, since according to EPC the correct P/N is actually 90542114...
Just to clarify, it seems that everyone here have been using 90485251 and the results are good, so this is good enough for me... just wondering about the P/Ns on EPC, that's all.
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Alas, I did mine a couple of years back, long before this place existed, and used green snot :'(
Been OK though :y
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Used the green initially, prior to the cheapo gaskets giving up, when I removed them the green had gone a beige colour, probably heat or oil ingress, if oil ingress surely there's a permiability factor. Anyway all blacked up now with decent VX gaskets and seems dry..
DC
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Mark are you still looking into getting hold of some of these kits? If so I'm interested, still haven't got round to mine :-[ No real problems though so it's obviously not too bad, and I've got new leads to fit at the same time so I don't care about the old ones getting wrecked.
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I have now done this job on the passenger side for the third time with a new genuine cover + gaskets + sealant.
Thank you so much for all the help as it now appears to be holding, despite a good thrashing this morning which couldn't be helped due to my mood when being cut up by an audi 2.0T and a golf TDi - needless to say, they both got owned when I'd finished.
Thanks again, especially mark for taking that photo of where exactly the sealant goes - excellent work :y
Chris
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Nice one Chris
I know where to go when I want my cam cover gaskets doing ;D
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Nice one Chris
I know where to go when I want my cam cover gaskets doing ;D
I've already had one request! Possibly this weekend!