Vacuum Engine mounts

S60D5185 · Jul 17th, 2018, 14:03

Hi
Could someone clarify the correct vacuum readings for the front and rear engine mounts as fitted to a 2007 D5 ?
If I use a mitt vac in the front mount I get 25”hg but the new rear one only 5”hg. If I connect a vac gauge after the Solonoid at tickover I get 5”hg are these readings correct ?
I have just changed the rear mount (old one had failed, gearbox on bumpstop) but still have a vibration between 1500 and 2500rpm which is felt through the floor.

Clan · Jul 17th, 2018, 14:06

Quote:

Originally Posted by S60D5185

Hi
Could someone clarify the correct vacuum readings for the front and rear engine mounts as fitted to a 2007 D5 ?
If I use a mitt vac in the front mount I get 25”hg but the new rear one only 5”hg. If I connect a vac gauge after the Solonoid at tickover I get 5”hg are these reading correct ?
I have just changed the rear mount (old one had failed, gearbox on bumpstop) but still have a vibration between 1500 and 2500rpm which is felt through the floor.

the rear one is leaking somewhere , is the white "L" piece adapter ok in the top ? they just push in and pull out ..

S60D5185 · Jul 17th, 2018, 14:14

Hi
The rear one is a new unfitted replacement for a new one I fitted a week ago (that gives the same readings). I expected 25”hg in both ?

Clan · Jul 17th, 2018, 15:34

Quote:

Originally Posted by S60D5185

Hi
The rear one is a new unfitted replacement for a new one I fitted a week ago (that gives the same readings). I expected 25”hg in both ?

have you sucked directly on to each mount and pumped up to 25"+ Hg and the pressure holds ?

S60D5185 · Jul 17th, 2018, 16:05

Yes direct to the front will pump upto and hold 25”hg, both rears only go to 5”hg but hold ?
Would this cause vibrations between 1500-2500 rpm when the vacuum is off (I have tested the solonoid and it switches the vacuum off around 1500)

cheshired5 · Jul 17th, 2018, 16:46

Both should hold 25 in/Hg and that's all you need to know.
What make have you bought?

S60D5185 · Jul 17th, 2018, 16:55

They are non genuine ‘fortune line’ good old ebay.

Would the lack of vacuum cause vibration above 1500rpm when the vacuum is off though?

cheshired5 · Jul 17th, 2018, 17:35

Quote:

Originally Posted by S60D5185

They are non genuine ‘fortune line’ good old ebay.

Would the lack of vacuum cause vibration above 1500rpm when the vacuum is off though?

Possibly but there are many reasons for vibrations.
Get working mounts first though and go from there.

S60D5185 · Jul 22nd, 2018, 08:31

Just an update, I have replaced the rear mount with a branded one and the vibration has disappeared. The engine however still feels slightly harsh and not as smooth reving as some others I have owned.

davebb · Jul 27th, 2018, 23:49

What is your right hand side engine mount under the crank pulley and gear box torque mount like,
Dave

Jul 17th, 2018, 14:03	#1
S60D5185 Member Last Online: Nov 20th, 2018 17:24 Join Date: Apr 2013 Location: Barnsley	Vacuum Engine mounts Hi Could someone clarify the correct vacuum readings for the front and rear engine mounts as fitted to a 2007 D5 ? If I use a mitt vac in the front mount I get 25”hg but the new rear one only 5”hg. If I connect a vac gauge after the Solonoid at tickover I get 5”hg are these readings correct ? I have just changed the rear mount (old one had failed, gearbox on bumpstop) but still have a vibration between 1500 and 2500rpm which is felt through the floor. Last edited by S60D5185; Jul 17th, 2018 at 14:11.

Jul 17th, 2018, 16:05	#5
S60D5185 Member Last Online: Nov 20th, 2018 17:24 Join Date: Apr 2013 Location: Barnsley	Yes direct to the front will pump upto and hold 25”hg, both rears only go to 5”hg but hold ? Would this cause vibrations between 1500-2500 rpm when the vacuum is off (I have tested the solonoid and it switches the vacuum off around 1500) Last edited by S60D5185; Jul 17th, 2018 at 17:16.

Jul 17th, 2018, 16:46	#6
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Both should hold 25 in/Hg and that's all you need to know. What make have you bought? __________________ 2002 S60 SE D5 Manual 209000 miles

Jul 27th, 2018, 23:49	#10
davebb Premier Member Last Online: Apr 17th, 2024 19:02 Join Date: Aug 2013 Location: Emsworth,hants	What is your right hand side engine mount under the crank pulley and gear box torque mount like, Dave Last edited by davebb; Jul 27th, 2018 at 23:51.

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Jul 17th, 2018, 14:14	#3
S60D5185 Member Last Online: Nov 20th, 2018 17:24 Join Date: Apr 2013 Location: Barnsley	Hi The rear one is a new unfitted replacement for a new one I fitted a week ago (that gives the same readings). I expected 25”hg in both ?

Jul 17th, 2018, 16:55	#7
S60D5185 Member Last Online: Nov 20th, 2018 17:24 Join Date: Apr 2013 Location: Barnsley	They are non genuine ‘fortune line’ good old ebay. Would the lack of vacuum cause vibration above 1500rpm when the vacuum is off though?

Jul 22nd, 2018, 08:31	#9
S60D5185 Member Last Online: Nov 20th, 2018 17:24 Join Date: Apr 2013 Location: Barnsley	Just an update, I have replaced the rear mount with a branded one and the vibration has disappeared. The engine however still feels slightly harsh and not as smooth reving as some others I have owned.

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