help my engine is making a lot of noise! - Page 3

spike4073 · Jul 11th, 2009, 10:18

right ...looks like i will be having to replace the soundproofing.....any idea what is best to use?

foggyjames · Jul 11th, 2009, 11:17

You can get off-the-shelf soundproofing from various sources. I imagine it might be something that frost (www.frost.co.uk) do.

cheers

James

Sam Widges · Apr 23rd, 2010, 17:05

Hello,have you tried turning it off?

spike4073 · Jul 27th, 2011, 11:44

grrr.... over reving problem is back :S ! ...

ive tested the vacuum valve with wires direct from battery..... its mechanicaly functional,

however following green books ive done some checks and the current to the vacuum valve never moves from the low ratio side to the overdrive side

im thinking that this is a microswitch fault stopping it changing up

at the moment im having to put up with revs around 40000 when traveling at 30mph... not good

ive had belts checked (good)

clutch clearance (good)

4 way vacuum valve seems ok will probably change it to be 100%

microswitch,,,, pretty sure its not working right will change it as soon as i source a replacement..

any ideas what to try next if changing the valve and microswitch makes no difference ??????

Clan · Jul 27th, 2011, 18:38

tachometric relay by the master cylinder ? you should hear it click when rpm gets near 2000 rpm when you listen under bonnet .

Vacuum leak from the plastic lines which go through the chassis , welding tends to melt them!

The rubber Diaphragm in one side or other of the primary unit drums can perforate .

The seals which seal the rotating union which let air in and out of the drums in the centre of the Primary unit drums can wear .

the vacuum 4 way valve may well click , but the head of the rubber valve inside tends to fall off ! easy to dismantle and bond back with superglue , it gives you another 18 months of life from it ..

Broken diaphragm springs in secondary unit ..

etc etc . there are a LOT of things which can cause your problem ...

imchafo · Dec 11th, 2013, 22:06

bad animals are in your engine

volvomania · Dec 12th, 2013, 08:10

Quote:

Originally Posted by Clan

the vacuum 4 way valve may well click , but the head of the rubber valve inside tends to fall off ! easy to dismantle and bond back with superglue , it gives you another 18 months of life from it ...

It is actually the vacuum side of the system that you need to check.
Have you already gone through this article yet? http://www.volvo300mania.com/forum-u...hp?f=6&t=12314
It actually describes how to investigate vacuum problems.

Since a couple of years you can get an overhaul kit for the 4 way vacuum valve.
Just have a look at article 3291047-R on http://www.born-built-beauties.eu/ht...n_par.html#CVT

Jul 11th, 2009, 11:17	#22
foggyjames 300 Register Keeper Last Online: Yesterday 17:23 Join Date: Dec 2001 Location: Nottingham	You can get off-the-shelf soundproofing from various sources. I imagine it might be something that frost (www.frost.co.uk) do. cheers James __________________ VOC 300-series Register Keeper '13 V70 D4 SE Lux '89 740 Turbo Intercooler '88 360 Turbo Intercooler '84 360 GLT '81 343 GLS R-Sport '79 343 DL '70 164

Jul 27th, 2011, 18:38	#25
Clan Experienced Member Last Online: Today 15:53 Join Date: Jun 2007 Location: L/H side	tachometric relay by the master cylinder ? you should hear it click when rpm gets near 2000 rpm when you listen under bonnet . Vacuum leak from the plastic lines which go through the chassis , welding tends to melt them! The rubber Diaphragm in one side or other of the primary unit drums can perforate . The seals which seal the rotating union which let air in and out of the drums in the centre of the Primary unit drums can wear . the vacuum 4 way valve may well click , but the head of the rubber valve inside tends to fall off ! easy to dismantle and bond back with superglue , it gives you another 18 months of life from it .. Broken diaphragm springs in secondary unit .. etc etc . there are a LOT of things which can cause your problem ... __________________ My comments are only based on my opinions and vast experience .

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Jul 11th, 2009, 10:18	#21
spike4073 Member Last Online: Nov 26th, 2011 11:12 Join Date: Aug 2008 Location: sheffield	right ...looks like i will be having to replace the soundproofing.....any idea what is best to use?

Apr 23rd, 2010, 17:05	#23
Sam Widges New Member Last Online: Feb 1st, 2015 19:08 Join Date: Mar 2009 Location: London View Photos By: Sam Widges	Hello,have you tried turning it off?

Jul 27th, 2011, 11:44	#24
spike4073 Member Last Online: Nov 26th, 2011 11:12 Join Date: Aug 2008 Location: sheffield	grrr.... over reving problem is back :S ! ... ive tested the vacuum valve with wires direct from battery..... its mechanicaly functional, however following green books ive done some checks and the current to the vacuum valve never moves from the low ratio side to the overdrive side im thinking that this is a microswitch fault stopping it changing up at the moment im having to put up with revs around 40000 when traveling at 30mph... not good ive had belts checked (good) clutch clearance (good) 4 way vacuum valve seems ok will probably change it to be 100% microswitch,,,, pretty sure its not working right will change it as soon as i source a replacement.. any ideas what to try next if changing the valve and microswitch makes no difference ??????

Dec 11th, 2013, 22:06	#26
imchafo New Member Last Online: Dec 19th, 2013 02:15 Join Date: Dec 2013 Location: frrank	bad animals are in your engine

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