beema41
I've just got the 264GL home and have started getting it ready for the Parkes 'extravaganza' 2014. Was going through the boot aka trunk and noted the previous owner/s have a bottle of Lead Replacement and a small measuring bottle. I was curious about this because one of my older 1978 Volvo 244GL's did not require any additive as it was listed on the Australian Government's and other industry websites as not requiring it. I was led to believe that the valves and guides were already uprated for unleaded which was available in Europe a lot earlier than Oz (we were lacking behind as usual).
Thus I went to google and did the basic research which again showed the 1977 Volvo 264GL listed as a vehicle NOT requiring any additive, simply ready for unleaded albeit Premium from 1986 (the year ULP was formally introduced and Leaded was removed from the market).
Any ideas or suggestions?
carnut1100
Prv motor has hard seats AFAIK.
Needs premium though.
egads (she/her)
Lead replacement stuff MAY also gum up injectors so an injector cleaner is probably not going to hurt.
Spac
Basic rule is iron heads need lead replacement, alloy heads do not.
It's amazing how many 2-series have a bottle of lead-replacement additive in the boot... Lots of wasted money there.
egads (she/her)
I had to triple check on the 74 145 with kjet as it came with said bottle but manual said 91 unleaded.
carnut1100
145 has iron head, will need additive unless the head has been fitted with hardened inserts.
Also some earlier alloy head motors have soft inserts, for instance the Peugeot 504 motors are well known for bad valve seat recession if the inserts are not replaced or additive used.....
My 245L has a flashlube metering unit fitted.....might pull it off and save it for a car that needs it!
Vee_Que
No the prv doesn't need lead replacement and they love driving on e10 blend 98 octane fuel.
egads (she/her)
B20F should be already.
A_Volvo_Driver
I run my 84 on 98 octane - it might've been a bad batch, but the car hated the cheap fuel.
carnut1100
B20F is iron head........
PRV is all alloy.
Angus242164
Iron heads from before the days of unleaded fuel generally do not have valve seat inserts, the valves just close directly against the iron head. The hardened steel valves are a much harder material than cast iron.
Lead, and other similar substances used in lead replacement additives, are there to lubricate the valves and seats. Put simply, the particles of lead are "squashed" between the valve and seat contact areas as the valves close, preventing direct contact between the two components. Without this lubrication, the very hard valves would wear away the much softer iron seats.
Alloy is far softer than cast iron, so all alloy heads have valve seats made of a much harder material, usually a similar hardened steel to the valves, and do not require lubrication from the fuel to prevent wear.
In Volvo terms, the B18/B20/B30 used in the 100 series are the last Volvo engines to require this lubrication. Even then, the seats do take quite a while to wear, and I'd say that a 140 driven occasionally on weekends might not need the valves to be adjusted for many years, running on unleaded fuel.
Angus242164
Also leaded fuel wasn't removed from sale in Australia in 1986, Googling will probably reveal the exact year but it was in the early to mid '90's, I was a kid at the time but remember a lot of confusion and misinformation about what people with older cars needed to do once leaded was no longer available. Dumb people were complaining on TV that the government was forcing them to buy a new car etc.
1986 was the year that ADR36 came in, requiring all new cars sold from that year onward to run on unleaded fuel, to be equipped with catalytic converters, to meet stricter emissions limits than the earlier ADR27 rules that started in '76 etc.
Interestingly "commercial vehicles" didn't have to have a cat until a later date, my '88 Landcruiser never had one, even though it's a 6 seater wagon body style vehicle.
Rob
Unleaded was removed from sale in 2001.
Lead replacement disappeared about 2 or 3 years later..
Spac
egads;24523 wroteB20F should be already.
But your Aussie K-jet car probably has a B20E.
egads (she/her)
Methinks the block needs checking as i am going off the manual and it is definitely a parts bin special from combination of bits.
egads (she/her)
Also it has a 74 djet manual and a 74 kjet manual. Was a bit confusing initially.
Angus242164
My understanding is that the B20F was for the North American market only. Low compression, with emissions systems like an air pump and possibly EGR.
We got the B20E instead, with higher compression, with either D-Jet or K-Jet depending on year and model (I'm pretty sure both systems were around at the same time, for a while).
Spac
Angus242164;24567 wroteMy understanding is that the B20F was for the North American market only. Low compression, with emissions systems like an air pump and possibly EGR.
We got the B20E instead, with higher compression, with either D-Jet or K-Jet depending on year and model (I'm pretty sure both systems were around at the same time, for a while).
This.
egads (she/her)
Ah, no air pump or egr so likely not this. Was wet and cold and late this morning so didn't actually check the block.
beema41
Vee_Que;24520 wroteNo the prv doesn't need lead replacement and they love driving on e10 blend 98 octane fuel.
I'm a little shy of e10 fuels. I had a BA Falcon work car once that suffered a major fuel system failure and I'm sure was killed by the mandatory use of e10, it always run like a dog, would piss and fart, stall and backfire. I once 'accidently' dropped a tank of premium 95 into it and it was like waving a magic wand, instantly fixed.
What brand e10 98 is the recommended?
