B20 water channel

arcturus · Sep 23rd, 2017, 16:34

I remember recently some discussion re' opening up water passages in B18/20,a screw somewhere I think. Is that it under the small plate just below the 'stat? in the photo?

Derek UK · Sep 24th, 2017, 22:08

That plate is replaced by one of the sensors on a F.I. engine.

grahamwatson · Sep 25th, 2017, 09:14

Breaking news! Volvo in F1 next year! Or have I misunderstood?

arcturus · Sep 25th, 2017, 09:54

Quote:

Originally Posted by grahamwatson

breaking news! Volvo in f1 next year! Or have i misunderstood?

c1800 · Sep 25th, 2017, 13:21

Might you be referring to the petcock on the right side of the block? When I flushed my cooling system I removed the petcock to the rear of the oil filter and blew in the hole with compressed air and all manner of crud was dislodged. Give it a try and see what happens. You'll then need to flush the block with water.

arcturus · Sep 25th, 2017, 13:35

Thanks all for replies. I found what I was looking for by surfing back through old forum discussions. I think that I had my wires crossed. The reference is to the long tube by Ron Kwas. https://www.volvoforums.org.uk/showt...ht=B18+cooling #8

Ron Kwas · Sep 25th, 2017, 13:43

Arcturus;

By "opening up water passages in B18/20" do you mean opening the supply holes of the Coolant Distribution Pipe within the Cyl Head, as covered here: http://www.sw-em.com/Coolant_Distrib...Pipe_Notes.htm
...repeating...my advice is NOT to undertake this work to improve a hot running motor, before you have performed a major and thorough Cooling System cleaning and flush!

Elaborating on Derek's info...the Diamond shaped Block-off plate on the side of the Cyl Head is used for the Coolant plumbing to the Oil/Coolant heat-exchanger on non-injected vehicles (like the P1800), and this location (and hole to hole spacing) was enlarged on later injected vehicle Cyl Heads, to mount the Aux Air Valve.

This topic was discussed here some time ago, so depending on search criteria, and how long one looks, you might be able to find it again, or the member who wrestled around with this issue (before we figured it out) might chime in.

Cheers

Edit; Looks like you found thread for CDP.

arcturus · Sep 25th, 2017, 16:20

Thanks Ron. The engine isn't overheating (boiling) but the gauge tem'p' goes up when I'm in traffic or going slow so I switch the electric fan. Goes down once I'm on the move. I'm not really worried, after all the temp' outside was over 30c. I'm just trying to increase my knowledge base

Sep 25th, 2017, 13:35	#6
arcturus arcturus Last Online: Today 08:17 Join Date: Mar 2006 Location: Sagres Portugal	Thanks all for replies. I found what I was looking for by surfing back through old forum discussions. I think that I had my wires crossed. The reference is to the long tube by Ron Kwas. https://www.volvoforums.org.uk/showt...ht=B18+cooling #8 __________________ life's too short to drink bad wine Last edited by arcturus; Sep 25th, 2017 at 13:41.

Sep 25th, 2017, 13:43	#7
Ron Kwas Premier Member Last Online: Today 11:51 Join Date: Jul 2007 Location: Connecticut, USA	Arcturus; By "opening up water passages in B18/20" do you mean opening the supply holes of the Coolant Distribution Pipe within the Cyl Head, as covered here: http://www.sw-em.com/Coolant_Distrib...Pipe_Notes.htm ...repeating...my advice is NOT to undertake this work to improve a hot running motor, before you have performed a major and thorough Cooling System cleaning and flush! Elaborating on Derek's info...the Diamond shaped Block-off plate on the side of the Cyl Head is used for the Coolant plumbing to the Oil/Coolant heat-exchanger on non-injected vehicles (like the P1800), and this location (and hole to hole spacing) was enlarged on later injected vehicle Cyl Heads, to mount the Aux Air Valve. This topic was discussed here some time ago, so depending on search criteria, and how long one looks, you might be able to find it again, or the member who wrestled around with this issue (before we figured it out) might chime in. Cheers Edit; Looks like you found thread for CDP. Last edited by Ron Kwas; Sep 25th, 2017 at 13:46. Reason: Posts crossed in the ether!

Sep 24th, 2017, 22:08	#2
Derek UK VOC Member Last Online: Today 15:54 Join Date: Jul 2006 Location: Chatham	That plate is replaced by one of the sensors on a F.I. engine.

Sep 25th, 2017, 09:14	#3
grahamwatson Member Last Online: Aug 8th, 2023 18:40 Join Date: Oct 2015 Location: Inverness	Breaking news! Volvo in F1 next year! Or have I misunderstood?

Sep 25th, 2017, 13:21	#5
c1800 Master Member Last Online: Apr 22nd, 2024 18:48 Join Date: Oct 2013 Location: Alberta	Might you be referring to the petcock on the right side of the block? When I flushed my cooling system I removed the petcock to the rear of the oil filter and blew in the hole with compressed air and all manner of crud was dislodged. Give it a try and see what happens. You'll then need to flush the block with water.

Sep 25th, 2017, 16:20	#8
arcturus arcturus Last Online: Today 08:17 Join Date: Mar 2006 Location: Sagres Portugal	Thanks Ron. The engine isn't overheating (boiling) but the gauge tem'p' goes up when I'm in traffic or going slow so I switch the electric fan. Goes down once I'm on the move. I'm not really worried, after all the temp' outside was over 30c. I'm just trying to increase my knowledge base __________________ life's too short to drink bad wine

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