Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Omegatoy on 07 June 2007, 22:41:07
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is it possible to remove the sump and replace the main and bigend bearings with the engine in situ?
anyone done it?
how easy/hard to remove the sump with engine in?
looks like i have to do aV6 bottom end!!!
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is it possible to remove the sump and replace the main and bigend bearings with the engine in situ?
anyone done it?
how easy/hard to remove the sump with engine in?
looks like i have to do aV6 bottom end!!!
According to Mr Haynes you can remove & replace the connecting rods and pistons.
The closest I've come is removing & replacing the sump! ;) :y
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If the big ends have run then there will be other damage and simply changing the shells can be a waste of time and money. If the bigends have failed due to low oil pressure then what state will the mains, cambearings etc be in? I would be looking for a replacement engine, change the manifold gaskets and camcover seals then drop it in.
You can get to the bigends once the sump is removed but to remove the sump you have to hang the engine from a beam resting on the inner wings, then you undo the engine mounts, unbolt the n/s steering idler arm bracket, split the steering box - centre tie-rod ball joint and unbolt the front subframe, lower the subframe about 4" at the rear and you should have room to get the sump off.
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If the big ends have run then there will be other damage and simply changing the shells can be a waste of time and money. If the bigends have failed due to low oil pressure then what state will the mains, cambearings etc be in? I would be looking for a replacement engine, change the manifold gaskets and camcover seals then drop it in.
You can get to the bigends once the sump is removed but to remove the sump you have to hang the engine from a beam resting on the inner wings, then you undo the engine mounts, unbolt the n/s steering idler arm bracket, split the steering box - centre tie-rod ball joint and unbolt the front subframe, lower the subframe about 4" at the rear and you should have room to get the sump off.
Blimey!!! no it hasnt reun the bigends mate but they are rattling when hot so i reckon a polish of the journals and replace the mains should have it sweet again, but i didnt reckon on having to remove so much to get to it!! mind you i was toild a similar story about the straight six when i first started playing with them, and a lot of it wasnt needed to ge the sump off!! will have to have a think!!
cheers Omegatoy
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So that noise is big ends you think? I've never heard big end noise, so useful to know :y
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So that noise is big ends you think? I've never heard big end noise, so useful to know :y
yep fairly certain mate from experience with turbo engines!! they give the bottom end a hard time due to increased cylinder pressures, its not terminal but it doesnt sound nice does it!!!
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So that noise is big ends you think? I've never heard big end noise, so useful to know :y
yep fairly certain mate from experience with turbo engines!! they give the bottom end a hard time due to increased cylinder pressures, its not terminal but it doesnt sound nice does it!!!
Didn't sound too good....
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Big end shells dont wear out without a reason.
If the oil pressure is low it can be due to increased clearances in the big ends and mains but is more usually due to wear and scoring of the pump lobes. Replacing the pump requires the removal of the cambelt sprocket bolt (vv tight) and removal of the aircon compressor and support bracket.
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but to remove the sump you have to hang the engine from a beam resting on the inner wings, then you undo the engine mounts, unbolt the n/s steering idler arm bracket, split the steering box - centre tie-rod ball joint and unbolt the front subframe, lower the subframe about 4" at the rear and you should have room to get the sump off.
I ws only talking about the small steel sump pan! :-[
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Big end shells dont wear out without a reason.
If the oil pressure is low it can be due to increased clearances in the big ends and mains but is more usually due to wear and scoring of the pump lobes. Replacing the pump requires the removal of the cambelt sprocket bolt (vv tight) and removal of the aircon compressor and support bracket.
agree entirely but i never said they were worn out! oil pressure is fine its just the shells have deformed,
owing to high cylinder pressures fromteh turbo or lack of oil changes or wrong oil, or any number of things!! but if was reasonably easy job to get sump off i would have had a look and assessed the damge rather than just tear the engine out and replace, have replaced mains and big end shells loads of times on different engies with the same problems usually polish the crank if its not scored and renew the mains and bigend shells to return the engine to good working condition, however never done a gm V6 ALTHOUGH DONE LOADS OF FORD V6 but the 2 engines just dont compare except that they are v configuration, done the straight six 12 and 24v and did one memorable 2.6 straight six that literaly could be heard coming down the street it was knocking that bad however cleaned it all up put new shells in and it went on to do another 67000 miles with no problem!! hence the reason for asking the questions about doability on the v6,
thanks guys but has anyone ever done the job on a gm v6?
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Done the big ends on a 1600 Rootes lump! Very easy