Engine 850: B5234TR/2.3/20v/T5R: - Sooty Plugs, judder at low revs - Page 3

AndysR · Feb 7th, 2008, 20:01

Stange thing to say "shouldn't pressurise" as has already been said the coolant system is pressurised so that it raises the boiling point of the coolant! The thermostat isn't fully open until the coolant in the engine has reached over 100 degrees!!

Alan M · Feb 10th, 2008, 11:35

Goergy Dee- A boost leak looks like your culprit. Jod seems to be on the right line of diagnosis. I have had a problem with mine where I thought it seemed to be hitting boost cut. The problem was cured with the purchase of a OE inlet manifold gasket. I have fitted two in the past after cleaning out the PCV system and they were the points of Air leaks/ingress. Have you ever had the inlet manifold off to clean or check the PCV system and if you have the gasket leak is one of the hardest to find. Companies such as Jamsport and Motorsport developments offer a service of leak detection through system pressurisation, with compressed air. I hope you find the culprit.

CTCNetwork · Feb 7th, 2008, 23:16

Hi,

22psi sounds Ok to me. When they pressure tested my 940 following a repair they pushed the pressure to 40psi (but that was with a grey cap fitted).

Yes, the pressure will drop as soon as you turn the engine off and as soon as the engine starts cooling down.
Test this by very slightly undoing the cap, and you will hear the hiss and see the bubble of coolant as the overflow tank fills!
Wait an hour, and you will be able to do the same with only a little hiss and much less pressure.

Again, imaging that closed space with you boiling the water.
As the water comes to the boil te pressure will increase.
Turn the heat off and leave it and the pressure will drop with the reduction in temperature...

Des. . .

Georgey dee · Feb 7th, 2008, 21:44

Here's some pictures of me hitting a Pheasant at **mph on the A65 at Skipton on the 1st Feb 08 on the way upto Centerparcs in Cumbria.

I have since polished the bonnet back to new, replaced the grill clips and re-painted the grill.

No other damage apart from a new set of PANTS!!!

Bird-strike-1.jpg Bird-strike-2.jpg
Bird-strike-3.jpg Bird-strike-4.jpg

I saw the whites of it's eyes the little Bast*rd!!!!!!!

Volvo 1 - Pheasant 0 (very dead)

AV SOME!!!!!!!!!!

PS ,,, I can recommend genuine Volvo wiper blades, they are very good at wiping blood!!

infinity1 · Feb 7th, 2008, 21:54

proper splat there george... messy

skynet2029 · Feb 7th, 2008, 23:02

Proper Road Kill there lol

AndysR · Feb 7th, 2008, 23:03

Nice! At least it didn't do any damage to the car, mind you it is a Volvo thinking about it!! lol

Feb 7th, 2008, 20:01	#1
AndysR VOC Member Last Online: Nov 13th, 2023 22:12 Join Date: Aug 2006 Location: Essex	Stange thing to say "shouldn't pressurise" as has already been said the coolant system is pressurised so that it raises the boiling point of the coolant! The thermostat isn't fully open until the coolant in the engine has reached over 100 degrees!! __________________ Volvo V40 T5 R-Design Lux Nav Geartronic owner

Feb 7th, 2008, 23:16	#3
CTCNetwork Forum Support Team Join Date: Dec 2004 Location: Liège, Belgium View Photos By: CTCNetwork	Hi, 22psi sounds Ok to me. When they pressure tested my 940 following a repair they pushed the pressure to 40psi (but that was with a grey cap fitted). Yes, the pressure will drop as soon as you turn the engine off and as soon as the engine starts cooling down. Test this by very slightly undoing the cap, and you will hear the hiss and see the bubble of coolant as the overflow tank fills! Wait an hour, and you will be able to do the same with only a little hiss and much less pressure. Again, imaging that closed space with you boiling the water. As the water comes to the boil te pressure will increase. Turn the heat off and leave it and the pressure will drop with the reduction in temperature... Des. . . __________________ Density:- Not just a measurement ~ It's a whole way of Life.! ! ! I drive a Volvo, Please Don't Get In My Way! OldVolvos4Ever He shows up. People die. He vanishes. People should not be afraid of their governments. "He'll deliver more justice in a weekend than 10 years of your Governments should be afraid of their people... "V" courts & tribunals. Just stay out of his way." "I plan to."

Feb 7th, 2008, 21:44	#4
Georgey dee Premier Member Last Online: May 1st, 2024 06:21 Join Date: Dec 2005 Location: Norwich View Photos By: Georgey dee	Pics of Bird strike!!!! Here's some pictures of me hitting a Pheasant at *mph on the A65 at Skipton on the 1st Feb 08 on the way upto Centerparcs in Cumbria. I have since polished the bonnet back to new, replaced the grill clips and re-painted the grill. No other damage apart from a new set of PANTS!!! Bird-strike-1.jpg Bird-strike-2.jpg Bird-strike-3.jpg Bird-strike-4.jpg I saw the whites of it's eyes the little Bastrd!!!!!!! Volvo 1 - Pheasant 0 (very dead) AV SOME!!!!!!!!!! PS ,,, I can recommend genuine Volvo wiper blades, they are very good at wiping blood!! __________________ HAD; 440 GLT(Loved it), 850 GLT auto(Loved it), S70 2.5T(Nothing but problems!), 850R auto(Loved it!!), S60 D5 SE (Nothing but problems!) GOT; S60 D5 SE Lux Auto RAF Marham Track Day Co-Ord' Last edited by Georgey dee; Feb 7th, 2008 at 21:58.

Feb 7th, 2008, 23:03	#7
AndysR VOC Member Last Online: Nov 13th, 2023 22:12 Join Date: Aug 2006 Location: Essex	Nice! At least it didn't do any damage to the car, mind you it is a Volvo thinking about it!! lol __________________ Volvo V40 T5 R-Design Lux Nav Geartronic owner

Feb 10th, 2008, 11:35	#2
Alan M Senior Member Last Online: Jan 24th, 2023 07:05 Join Date: Dec 2007 Location: Cannock/Solihull	Goergy Dee- A boost leak looks like your culprit. Jod seems to be on the right line of diagnosis. I have had a problem with mine where I thought it seemed to be hitting boost cut. The problem was cured with the purchase of a OE inlet manifold gasket. I have fitted two in the past after cleaning out the PCV system and they were the points of Air leaks/ingress. Have you ever had the inlet manifold off to clean or check the PCV system and if you have the gasket leak is one of the hardest to find. Companies such as Jamsport and Motorsport developments offer a service of leak detection through system pressurisation, with compressed air. I hope you find the culprit.

Feb 7th, 2008, 21:54	#5
infinity1 Junior Member Last Online: Mar 21st, 2018 21:52 Join Date: Dec 2004 Location: frimley	proper splat there george... messy

Feb 7th, 2008, 23:02	#6
skynet2029 850 Addict! Last Online: Mar 13th, 2024 21:56 Join Date: Dec 2006 Location: Cumbria View Photos By: skynet2029	Proper Road Kill there lol

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