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Massive Oil Leaks 1998 V70-XC AWD

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Re: Massive Oil Leaks 1998 V70-XC AWD

Post by abscate »

OUch, at 5 bucks a quart for oil, thats 20 cents per mile for oil. It is a cheap part, with 10 hours of labor attached - indeed, the transmission has to be removed to replace it.
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Re: Massive Oil Leaks 1998 V70-XC AWD

Post by scot850 »

The mechanics are both correct on the time for the repair. Volvo details 10 hours or so for this repair. Part is about $20! If you go that far, then have the front transmission seal done at the same time as it is accessible.

Check what the quote is on the RMS for labor at the mechanics, and then check at the dealer if you plan to have this done. Dealer now has a lifetime repair warranty on parts and labor. The reason I mention this is I had the sealer do this, and I had the front transmission seal fail again and the RMS (not blaming the mechanic as a PO had screwed with the car in replacing this before I bought it). So even the pros' get it wrong. Check with the guys you have spoken to, to see what guarantee they give on the repair.

Robert is wise and his order for repairs is good. You may well find the RMS leak may reduce significantly once the oil lines and PCV clean out is done. Then maybe throw in a 'magic' leak seal in the oil to see what happens. Not a fan of those products, but they have been known to work.

On the oil line leak, where is it? A common failure is where the line exits the oil cooler thermostat housing below the crankshaft pulley. The 'O' rings fail with age as they harden. Check the lines carefully for leaks themselves, but you may be lucky and it is just the 'O' rings need replaced.

What also happens is there is a locking plate that slips over the 2 oil lines at the thermostat housing and over time that bends back and allows the oil lines to move out a little and oil then leaks around the 'O' rings. Either replace the plate or reverse it and it will be good.

If you have someone else do this job, make sure they use a mirror and check the 2 holes on the thermostat housing for the oil lines, especially the lower edges as oil sets hard there from the leaks, and forcing an 'O' ring over them will just split the new rings. I eventually removed the thermostat housing and carefully cleaned it, replaced the seals (for the 3rd time) and all was then good. The dealer did the first 2 times and said the lines had to be replaced. I did this before discovering the real fault!

PCV system is not too bad, a turbo has a few more access issues than a non-turbo, but not too bad (just done my 4th one).

Wish you luck! When they run well, the 98 XC is a good car. Had one and sold it to fund the 'R'. New owner loved it!

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Re: Massive Oil Leaks 1998 V70-XC AWD

Post by FLXC90 »

disregard, I didn't see pages 2 and 3 when I responded :oops:
If you can cover the RMS repair, do the PCV first, put it in for the Main seal, then finish leak chasing yourself. You will save money, and develop a much better understanding of your car. If you are like a lot of us a deeper emotional bond with it as well.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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