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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, 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

radek93
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Intercooler weep hole

Post by radek93 » Tue Apr 28, 2020 6:51 am

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?

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Re: Intercooler weep hole

Post by abscate » Tue Apr 28, 2020 5:14 pm

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
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Re: Intercooler weep hole

Post by jimmy57 » 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.
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abscate
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Re: Intercooler weep hole

Post by abscate » Wed Apr 29, 2020 9:31 am

On the NA cars, the weep hole is under the driver seat.
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radek93
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Re: Intercooler weep hole

Post by radek93 » Wed Apr 29, 2020 12:31 pm

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?

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