Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: polilara on 28 May 2025, 10:01:29
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So ordered Gates kit but base plate of it is too long. I cannot install it. It hits the rear cover. I learned from Haynes that there are two types of rear covers original and modified. Can it explain this. Could anyone inform which Gates kit is suitable for me. Just took out CT 990 K1 Continental kit. What is this all about?
Engine No: 08533230
Car code: W0L0VBM6911079201
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Swap the pulleys onto the original plate ;)
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That's possible naturally but is there any explanation for this. I will reject this kit. Does anyone know what is the difference of original and modified timing rear cover. I can send photos from the both base plates, even the distance of tensioner and upper guiding roll differs. Earlier I used original GM 5636385 kit, last time Continental as informed, similar to original. Gates should have that, too. In Autodoc there are three different Gates kits for this engine, some of the should fit??
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Looking on AutoDoc, the only Gates kit that seems to match your engine number is the first one listed: K025453XS.
Unless I’m reading it wrong?
For what it’s worth, I’ve always bought the Contitech CT 990 K2
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Might be a 2.5/2.6 Vs 3.0/3.2 difference.
Swapping the pullies over isn't a new concept :y
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Thanks for comments, I used CT 990 K1, it has two adjustable guiding rolls, like original kit.
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Contitech CT990K1 is correct for your car and has the correct backplate. The Gates equivalent is K025453XS. Engine numbers 08300419 to 08578511.
Contitech CT884K1 is for C25XE and X25XE/X30XE. The Gates equivalent is K015453XS which seems to be what you have received. These kits are for engine numbers up to 08300418. The original backplates on these engines have the letter "D" moulded into it. The rollers on the "D" backplate were subject to failures which did not go down well in the USA. Post model year '97, there was a mandated retrofit update to the backplate, upper idler and the tensioner and a strengthened drive belt. These redesigned backplates have E or E1 or E2 moulded into them. That's the reference in Haynes.
You should not reuse a "D" backplate. Any of the "E" versions you can swap over the upper idler and tensioner to get the assembly to fit.
You should also be able to use Contitech CT990K2 or Gates K035453XS kits. These are for later Y26SE/Y32SE (and Z32SE not used in Omega B), engine number 08578512 onwards. This has a lower idler roller without any eccentric adjustment.
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Thanks Enceladus, professional text as usual. That explains "What this is all about"...