Welcome to the world's #1 Volvo forum!

Volvo Fixes & Advice since 2001.

Login Register

Intercooler weep hole

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, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Post Reply
radek93
Posts: 51
Joined: Sat Dec 07, 2019 2:43 pm
Year and Model: S70 98
Location: Home

Intercooler weep hole

Post by radek93 »

I have S70 2.5t 98r. They write everywhere that this song has no effect on the amount of air delivered to the engine. The hole shouldn't have a cork that clogs like a turbo blows? I have a place under the radiators where you can see how clean it is because it's blown with high pressure. Is it normal?

User avatar
abscate
MVS Moderator
Posts: 25172
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99: V70s S70s,05 V70
Location: NYC, ALBANY NY
Has thanked: 512 times
Been thanked: 1525 times

Post by abscate »

Yes it is. It blows out any water or oil that makes it way in.

You can usually see the blow pattern on the tray under the car
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

jimmy57
Posts: 6675
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 4 times
Been thanked: 280 times

Post by jimmy57 »

Intercoolers can collect water condensed from the compression of turbo and the pressure drop from cooling. For a time many manufacturers dealt with it by putting the drain in intercooler. The ECM calibrations assume some loss of MAF measured air from the leak. The designs of intercoolers and the connecting plumbing has changed to deal with evacuating the collected water. The symptoms of too much collected water can be as severe as severe misfire on a high throttle opening, even stalling. If enough has collected it can hydraulic one or more cylinders and bend valves. Ford F150 3.5L Ecoboost had some issues from water in cooler circuit in the first couple of model years.

User avatar
abscate
MVS Moderator
Posts: 25172
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99: V70s S70s,05 V70
Location: NYC, ALBANY NY
Has thanked: 512 times
Been thanked: 1525 times

Post by abscate »

On the NA cars, the weep hole is under the driver seat.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

radek93
Posts: 51
Joined: Sat Dec 07, 2019 2:43 pm
Year and Model: S70 98
Location: Home

Post by radek93 »

jimmy57 wrote: Wed Apr 29, 2020 8:15 am Intercoolers can collect water condensed from the compression of turbo and the pressure drop from cooling. For a time many manufacturers dealt with it by putting the drain in intercooler. The ECM calibrations assume some loss of MAF measured air from the leak. The designs of intercoolers and the connecting plumbing has changed to deal with evacuating the collected water. The symptoms of too much collected water can be as severe as severe misfire on a high throttle opening, even stalling. If enough has collected it can hydraulic one or more cylinders and bend valves. Ford F150 3.5L Ecoboost had some issues from water in cooler circuit in the first couple of model years.
Is something causing increased water accumulation?

Post Reply