Fitting a 531 head?

66Lover · Aug 13th, 2017, 21:15

Hi folks,

Just wondering if anybody knows what is involved in fitting a 531 head to my 92' 240 with a b230f.

The free'er flowing 531 head is from a 940 so has a head mounted dizzy.
I'm told however its just a case of bolting it onto the b230f block, using the 240 cam cover to blank the dizzy.

It would be using a vx3 cam the 531 came with so shouldn't need shimming i guess.

Anything else I've missed?

skidje · Aug 14th, 2017, 21:26

FB and FX engines (also fitted to 240) had the 531. FB mostly in 940 and FX I only saw in the Swiss Volvo 240.

So yes can easily be done. Expect re-shimming though if you fit another cam.

In the rear you need to close the hole left by the distributor simply by means of a plug readily available with the spares suppliers.

Good luck.

crogthomas · Aug 14th, 2017, 23:13

If the 531 originally came from a B230ET engine there will be an extra sensor hole in the rear of the head adjacent to cylinder 4. It's for the ET's thermal time switch. Either leave the unused sensor blocking the hole or blank it off (M14).

T5Sweep · Aug 15th, 2017, 07:48

A lot of work for 10-15bhp.

66Lover · Aug 15th, 2017, 10:58

Thanks for the replies folks. Sounds easy enough. Just not sure which 'blanking plate' I need to block off the old head, dizzy hole.

Yeah T5Sweep, I guess it it - but the car is my only one and a daily driver. So as much as I'd lover to turbo the car, bolting on a head and cam in a day is a much more manageable prospect of going from 115hp - 135+hp mated to a 2.25 exhaust I've got.

crogthomas · Aug 15th, 2017, 12:40

The blanking plug is rubber coated plug that fits in the back of the head where the distributor would go on the 940. Your 240 B230F engine will be fitted with one. I'm not sure if it is possible to remove and reuse it.

It's available from Volvo still. It should be obvious from the parts diagram if you go and ask at the counter.

crogthomas · Aug 15th, 2017, 12:42

Just found the part number in my notes from a recent rebuild:
Distributor head blanking plug 1336763

skidje · Aug 19th, 2017, 07:12

Quote:

Originally Posted by crogthomas

Just found the part number in my notes from a recent rebuild:
Distributor head blanking plug 1336763

Yep.. Thats the one .... http://www.skandix.de/de/fahrzeug-te...welle/1001174/

360beast · Aug 19th, 2017, 10:28

Is the vx3 cam in the head already? If it isn't and you are fitting it then it will need shimming.

Nicholas Lewin · Aug 27th, 2017, 21:06

66 Lover - please let us know how you get on fitting the head/camshaft.

My 240 is my daily driver too and like you, I'd like a little more life out it too - 2.25 SS exhaust and an electric cooling fan (and very recently a new throttle switch) mean that on a long journey I'm driving quietly and getting an average of about 35-6 MPG which is pretty respectable. I think that the 531/VX combo might just improve things a bit further... keep us all posted will you?

Good luck, Nick

Aug 13th, 2017, 21:15	#1
66Lover Member Last Online: Sep 5th, 2020 15:16 Join Date: Jun 2006 Location: Cheshire	Fitting a 531 head? Hi folks, Just wondering if anybody knows what is involved in fitting a 531 head to my 92' 240 with a b230f. The free'er flowing 531 head is from a 940 so has a head mounted dizzy. I'm told however its just a case of bolting it onto the b230f block, using the 240 cam cover to blank the dizzy. It would be using a vx3 cam the 531 came with so shouldn't need shimming i guess. Anything else I've missed?

Aug 14th, 2017, 21:26	#2
skidje Master Member Last Online: Mar 8th, 2024 05:45 Join Date: Nov 2002 Location: Eindhoven	FB and FX engines (also fitted to 240) had the 531. FB mostly in 940 and FX I only saw in the Swiss Volvo 240. So yes can easily be done. Expect re-shimming though if you fit another cam. In the rear you need to close the hole left by the distributor simply by means of a plug readily available with the spares suppliers. Good luck.

Aug 14th, 2017, 23:13	#3
crogthomas Master Member Last Online: Apr 23rd, 2024 08:24 Join Date: Jan 2008 Location: Bracknell, Berkshire, UK	If the 531 originally came from a B230ET engine there will be an extra sensor hole in the rear of the head adjacent to cylinder 4. It's for the ET's thermal time switch. Either leave the unused sensor blocking the hole or blank it off (M14).

Aug 15th, 2017, 07:48	#4
T5Sweep Master Member Last Online: Oct 24th, 2022 09:28 Join Date: Sep 2014 Location: Peterborough	A lot of work for 10-15bhp.

Aug 15th, 2017, 10:58	#5
66Lover Member Last Online: Sep 5th, 2020 15:16 Join Date: Jun 2006 Location: Cheshire	Thanks for the replies folks. Sounds easy enough. Just not sure which 'blanking plate' I need to block off the old head, dizzy hole. Yeah T5Sweep, I guess it it - but the car is my only one and a daily driver. So as much as I'd lover to turbo the car, bolting on a head and cam in a day is a much more manageable prospect of going from 115hp - 135+hp mated to a 2.25 exhaust I've got.

Aug 15th, 2017, 12:40	#6
crogthomas Master Member Last Online: Apr 23rd, 2024 08:24 Join Date: Jan 2008 Location: Bracknell, Berkshire, UK	The blanking plug is rubber coated plug that fits in the back of the head where the distributor would go on the 940. Your 240 B230F engine will be fitted with one. I'm not sure if it is possible to remove and reuse it. It's available from Volvo still. It should be obvious from the parts diagram if you go and ask at the counter.

Aug 15th, 2017, 12:42	#7
crogthomas Master Member Last Online: Apr 23rd, 2024 08:24 Join Date: Jan 2008 Location: Bracknell, Berkshire, UK	Just found the part number in my notes from a recent rebuild: Distributor head blanking plug 1336763

Aug 19th, 2017, 10:28	#9
360beast Go redblock or go home Last Online: Today 00:54 Join Date: Feb 2012 Location: UK	Is the vx3 cam in the head already? If it isn't and you are fitting it then it will need shimming.

Aug 27th, 2017, 21:06	#10
Nicholas Lewin newish member Last Online: Nov 7th, 2020 23:35 Join Date: Jan 2016 Location: London	66 Lover - please let us know how you get on fitting the head/camshaft. My 240 is my daily driver too and like you, I'd like a little more life out it too - 2.25 SS exhaust and an electric cooling fan (and very recently a new throttle switch) mean that on a long journey I'm driving quietly and getting an average of about 35-6 MPG which is pretty respectable. I think that the 531/VX combo might just improve things a bit further... keep us all posted will you? Good luck, Nick

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