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300/66 Series General Forum for the Volvo 340, 360 and 66 cars |
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1983 b19aViews : 1578 Replies : 7Users Viewing This Thread : |
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Jul 20th, 2018, 07:45 | #1 |
VOC Member
Last Online: Jun 15th, 2024 22:11
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Location: Swineshead/Salford
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1983 b19a
Does it need lead substitute or will it be fine on normal unleaded petrol.
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Jul 20th, 2018, 12:25 | #2 |
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Last Online: Yesterday 23:26
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If i remember correctly it is high compression , the remedy was two head gaskets and a thicker water pump top seal to compensate , however , unleaded has moved on now it is much better quality , so just drive it and if it does not " Pink" under load then it's fine ...
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Jul 20th, 2018, 17:55 | #3 |
Go redblock or go home
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Location: UK
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Hey Carl
B19a is low compression 8.5:1, my 84 360 had a b19a and it ran perfectly fine on 95 unleaded for 3k miles in the 3 months I used it. |
Jul 20th, 2018, 23:03 | #4 |
300 Maniac
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I'd be inclined to agree - if it's not pinking I wouldn't worry about it
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Jul 22nd, 2018, 11:08 | #5 |
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Last Online: Jul 22nd, 2021 14:56
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360
Hi mate.
My 1983 B19A is a daily driver on normal unleaded. Don't panic. Cheers Mark. :c ool: |
Jul 23rd, 2018, 17:05 | #6 |
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info
It's nothing to do with octane rating or compression or pinking. I know it runs fine with unleaded. I am very slightly concerned with the valve seats that are now uncushioned by lead free petrol.
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Jul 23rd, 2018, 19:46 | #7 |
300 Maniac
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Well aware you were referring to valve seats, again - wouldn't worry about it, believe they all used hardened valve seats: https://www.volvoclub.org.uk/unleaded.shtml
Last edited by SteveP; Jul 23rd, 2018 at 19:54. |
Jul 23rd, 2018, 21:19 | #8 |
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Last Online: Yesterday 23:26
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Alloy headed engines have hardened seats to start with , the old wives tale about valve recession applies to old cast iron heads .. and even then it takes a long long time for anything to become evident .
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