S/V40 1.9D Shut-off throttle & EGR valve

[Baffler]

Spotted some traces of oil around the fuse box and wondered where it might be coming from...?





T40 needed to remove the engine cover.



I had suspected it was coming from the EGR valve but, after removing the engine cover, I discovered the area around the shut-off throttle was wet with oil so I figured a new seal or gasket was in need



Hard to see in the picture but that's actually wet with oil





Three 10mm studs and it's off, cleaned and ready for new seal



Over time oil has seeped down and collected to the rear of the inlet manifold





Old vs new



Mine wasn't too bad but, if you've ever wondered why the top of the manifold on these engines gets so wet, I believe here's the answer





I also gave the EGR valve a clean while I was in there and, although not really needed, put on a new gasket.
My light was fading fast so apologies for no pics if the inner side of the EGR valve. Luckily for me the previous owner kept it cleaned so it wasn't too much trouble. I have noticed quicker/better throttle response with the little clean I gave it...either that or it's the placebo effect





Someone stamped a Renault sign into my valve



All back together nice and dry









Lets hope it stays that way



Whilst cleaning and connecting up the EGR valve I spotted something that caught my attention



What's that doing in my Volvo?


Hope this helps...

[Biotoxic]

Check for blow by, remove oil dipstick a bit, and take a look if you can see some smoke coming out, not much, but still something
Engine looks nice and tidy
Question, that strut brace, can you actually feel some difference while driving/cornering?

P.S. If you didn't know, you even have a Renault engine, not just some parts from other car makers

[sebaveh]

Its not that unusual that parts can be interchangeable. After all, there are companies like Bosch, Pierburg... Who makes parts for all other car makers and brands. And those parts are simple and good enough for everyone. Sure there are some changes in design, but it would be also too expensive for one car brand to make their own special parts. So they rather use what suppliers can already supply.

Very bright side is - there are plenty spare parts around, even from other brands.

[Baffler]

Thanks chaps, I was aware that my Renault engined, Swedish styled, Japanese inspired, Dutch built S40 has a few bits from other manufacturers but was just surprised to see the VAG stamp on the EGR connection. VAG obviously had some input on manufacturing of the wiring loom...

Originally Posted by Biotoxic

Question, that strut brace, can you actually feel some difference while driving/cornering?

I don't know...I've never had it off since buying it. My '98 S40, on the other hand, has the Volvo strut brace and it made a dramatic difference to the sharpness of the steering

[littlehomer]

Hey up,

I have this exact same problem.

I will be changing the seals asap!

My strut brace worked a treat to tighten things up. I think it just brings the geometry back to where it should be after 10 years of wear and tear!

Many Thanks,

Daniel.

[Overbomber]

This is also exactly the same problem as I've been having.
Lots of heavy carbonated oil spraying out from the shut-off throttle joint. Eventually there was a detonation in the manifold which blew the throttle shut-off apart, leaving the flange still bolted to the manifold but the rest of the pipe hanging about 10mm away. It ran like crap. When I stripped it all down there was a lot of oily carbon gunge build-up in the manifold and oil residue in the pipework down to the rad. Explosion caused by a build up of oily fume in the manifold?
I've done a temporary fix on the shut-off but need to replace it with a complete unit plus new seals too as it's not 100% air tight.
What's causing such a volume of heavy crud/oil/carbon to build up - 88k miles and run without much stop/start?

Phil

[Overbomber]

Hey littlehomer, I can't PM you as I've not made 30 post yetbut I'm interested- PM me with a price etc...

Phil

[sebaveh]

Originally Posted by Overbomber

What's causing such a volume of heavy crud/oil/carbon to build up - 88k miles and run without much stop/start?

Phil

Short distance driving, I guess. And don't get too gentle on gas pedal every so often

[Buckoboy]

Cheers Baffler and Biotoxic for their great photos and guides on how to clean and change the seals on EGR valve and throttle body.
I'm half way through doing it on my day off, (just breaking for lunch and checking back here in case i've missed anything), all seems to be going okay so far and the throttle body seal was really flattened off, the metal egr gasket seemed okay but i had bought it anyway so will chuck it in.

The gaskets cost:

30662337 - Rubber body seal £10.40
30621283 - Metal EGR seal £7.90

Non-stock but the parts came within 2 hours!

[Buckoboy]

I have just finished this myself and one thing to watch is clearing out the inlet manifold properly.

On the test drive, it lacked power and was very smoky, after removing the egr valve again i noticed lots of lumps of black soot under the valve plates, allowing exhaust gases to circulate at low revs.

Maybe sticking the hoover hose in the open inlet manifold, with a rag over it if your worried about sucking up all the oil!

Certainly seems to run better now and hopefully cured that messy oil splatter across the fuse and wiper motor covers.

Thanks to all above for great advice and photos.