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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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The best laid plans and all that.Views : 441 Replies : 9Users Viewing This Thread : |
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#1 |
Torquemeister
Last Online: Yesterday 18:47
Join Date: Dec 2004
Location: Asgard, Cheshire
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The Valdez is booked in for its MoT on Monday so I decided to give it a quick once over - lights, wipers etc., nothing too complicated.
As part of this exercise I thought it might be a good idea to check the spark plug gaps as they hadn't been done for some time, and that's where it went awry. No.1 plug out and re-gapped from 0.8 to 0.7mm. No.3 plug out and re-gapped from 0.8 to 0.7mm. No.4 plug out and re-gapped from 0.8 to 0.7mm. No.2 plug is, as all you observant 900-series forum people will have noted by now, not on that list. That's because it has decided that it is NOT, under any circumstances whatsoever, leaving its comfy home. As I see it, I have a few options: leave it well alone even though it is probably also gapped to 0.8mm; get a bigger ratchet than the 1/2" one I resorted to; apply some form of lubricant/seal-breaking compound in hopes of freeing it off. Sensible and practical suggestions are welcomed - removing the cylinder head is not, IMO, among them.
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loki_the_glt - Skipper of the Exxon Valdez, driver of Sweden's finest sporting saloon - and pining for another Slant-4. |
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#2 | |
Master Member
Last Online: Today 12:27
Join Date: Jul 2021
Location: United Banana Republic of Portugal
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Proud owner of a 1997 940 2.3 lpt Manual with 501,000km. |
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#3 |
Senior Member
Last Online: Today 07:50
Join Date: Jun 2021
Location: Bournemouth
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I once partly sheared off a glowplug by using a little* extra force - had a of known at the time that a warm engine was beneficial then I would have done it that way.
I've used a warm engine every time since ![]()
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Current fleet; 1998 Volvo 940 2.3 LPT (mine) 2003 Peugeot 406 2.2Hdi ( also mine ) 2019 Citroen C3 ( wife's ) |
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#4 |
Junior Member
Last Online: Today 15:07
Join Date: Feb 2007
Location: EDINBURGH
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I would try some decent penetrating oil and leave it overnight.
Were the plugs put in dry or were they greased prior to installation. I always put mine in dry and torque them. Never had any problems this way👍 |
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#5 |
Offgrid camper
Last Online: Yesterday 18:41
Join Date: Apr 2022
Location: Havant
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Have you checked that 0.7 is the correct gap. If I remember correctly, 0.7 is correct for NGKs, but 0.8 is the gap for Bosch on my B200E engine
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Cinderella ( Cinders ) - 1988 Volvo 740 saloon with B230E engine The Hoe - 1990 Volvo 740 estate with B200E engine The House - 2005 LDV Convoy hightop with Ford Transit turbo engine. Save Old Cars |
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#6 |
Premier Member
Last Online: Today 08:38
Join Date: Jul 2012
Location: Lenzie
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The gap should be the same regardless of the make of plugs. It's set for the engine.
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V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990 |
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#7 | |
Master Member
Last Online: Today 12:27
Join Date: Jul 2021
Location: United Banana Republic of Portugal
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I guess it's because things are made of different metals and compounds, so they expand and contract at different rates and speeds!? Either way, it is amazing how something that seems completely ceased will come of like butter after a little bit of torching.
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Proud owner of a 1997 940 2.3 lpt Manual with 501,000km. |
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