Leaded / unleaded?
Another novice question! I'm looking at donor Sierras (determined on this!) and obviously a lot of them date from the days of 4-star, when I was but a nipper. What are the implications for the fact that it's no longer available? Do people running these cars still use 'additives' / do they run them with unleaded but accept the performance deterioation / or did everyone get their cars converted to run on unleaded back in the late 80s or whenever it was that 4-star disappeared off our forecourts...?
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It depends what you are using the car for. You can actually run a "leaded" head on unleaded providing you drive properly. To convert it to unleaded i don't think you need to do much more than either change valves or valve seats. If i bought a leaded engine, i would have it converted to unleaded while it was out of the car. Fords after 1989 are factory unleaded.
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As far as I know, only the earlier Pinto engined Sierras are likely to used leaded petrol.
The CVH & 2 litre DOHC engines are fitted with unleaded heads. I asked my local engine builder recently for a conversion cost, the price was just shy of £150. His advice, " The old valve seats would be hard as hell due to the mileage " " If you are not going to be running up & down the motorways, you'll be unlikely to do the valve seats any harm " :) That said, if it were my build & was going to fit an early Pinto engine, I would opt for a conversion. :) |
My pinto was leaded, whilst my engine was in bits i head the head skimmed and converted to unleaded for the cost of £50.
Terry |
Cool - sounds like this'll be a minor problem compared to the job as a whole!
Thanks for the feedback chaps! |
I think there is are 2 letters macined into the engine block on the offside exhaust manifold, mine was EN from memory. If you are going to buy your car you could use this as a check. I am sure twin knows the details for this, but was in the Haynes Manual
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Here's a list of the Pinto unleaded codes
ID Code Engine Unleaded Head stamp
LC 1.6 Standard M, MM, N or NN LS 1.6 Long stroke (Similar to the 2.0 engine block) M, MM, N or NN RE 1.8 S or SS NE 2.0 Carburettor L, P, PP, R or RR NR / N4 /205 2.0 Fuel injection L, P, PP, R or RR It is to be found stamped into the head adjacent to one of the spark plugs. Tis either 1 or 4, can't remember which one at the mo :o Will have a look in the Sierra manual when I get a chance :) |
Quote:
Bob |
Blooming heck Bob :eek:
The mention of 5 star petrol takes me back to my childhood. Me dad used to send me up the garage for a gallon of 5 star petrol to put in the Mk7 Jaguar he was fixing up. 1s 10d per gallon seems to ring a bell !? I am 57 so you must be very old mate :D :D :p |
I am not that far behind you Ronnie but I am not a grandad yet [I think]:p :) I did have a rover 3500s and that suffered on 4 star.
Bob |
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