Welcome to the DAF Owners Club discussion forums. These have been online since 2004 and are open to anyone - club member or not.
The DAF Owners Club has been the original and leading source of information about DAF Variomatic cars in the UK since 1980.
We are known throughout this country and abroad for providing accurate and relevant help and advice about DAFs and the Variomatic transmission.
We also provide new specialist spares including drive belts and filters and we supply to the UK and worldwide.
More information about DAFs and the club at the main website - www.dafownersclub.co.uk.
Post by stevethenortherner on Jul 6, 2020 16:55:30 GMT
Since I brought my 46 back from the spray shop and having the the horrendous journey, I haven't looked at the engine. So today I drained the oil (which was overfull by about half a litre and smelled suspiciously of petrol) and cleaned the strainer and put the right amount of fresh oil back in. I did a compression check, 170 psi in the offside, and 135 psi in the nearside.Took off the air cleaner which had a bit of oil in the bowl, checked the split pipe under the rubber domed breather pipe which sits in front of the air filter bowl, OK. I started the engine and it ticked over OK, but a test drive up and down the drive revealed clouds of oily smoke from the exhaust. Just as it was before I took it to the spray shop.
Having a good compression, could the problem be broken oil control rings? Or something else which I can't pin down yet?
The excess level of oil/petrol was maybe due to the spray shop trying to start the car with full choke repeatedly unsuccessfully, or could it be a different problem? My car has an electric fuel pump. Is this standard on a 46? I thought maybe the float valve in the carb maybe failing, causing excess petrol to work its way into the sump. Any ideas?
Air-cooed Dafs do not have an electric fuel pump as normal, so any fitting of one would have been an alteration by a previous owner. I don't consider them necessary, as the ordinary hydraulic pump is well up to the job in all but the most extreme circumstances. As to whether the carburettor is playing up, I'd suggest an emissions check, which would show if the unburnt hydrocarbon level was too high.
I also don't think your compressions are close enough to each other. a difference of 10% is the maximum I should have thought appropriate, and preferably 5%. Remember this is a 2 cylinder engine, so any imbalance in the compression would be felt more than, say a 4 cylinder engine, AND being horizontally opposed means the differences may be further exacerbated in any engine vibration.
Major Denis Bloodnok, Indian Army (RTD) Coward and Bar, currently residing in Barnet, Hertfordshire!
Please note that "registering as a user and member" of these forums does not mean that all contributors are actual members of the DAF Owners Club. Views, general postings, technical and other comments and advice appearing are not necessarily those of the club, its officers or committee, nor reflect original DAF company advice. The DAF Owners Club is not responsible for actions or consequences of advice and comments appearing here. The Club does not endorse products, goods, services or offers that may be referred to on this site either directly or indirectly.
Data Protection : The DAF Owners Club holds any submitted data for the efficient running of the Club and the data is not shared, sold or made available to any other individuals or organisations.