Monday, 30 June 2014
Bill's Blog 1 (for rev-heads and tinkerers)
Although the continuum of adventure is fantastic I think the most pleasure I have had to date is seeing a near instant sequence of expression on the faces of young kids from; true disbelief, amazement, repeated disbelief and then shear delight when they see the old cars appear in their village. The adults have equal pleasure but are not quite as expressive until they see the wooden spoked wheels which they always tap, feel, then laugh and give a thumbs up.
No doubt there are petrol head vintage blog followers who are interested in the vehicles mechanical progress and would like some more detail. My conspicuous absence from blogging may reflect that I have been attending to things mechanical and not literal. So an attempt to satisfy those is made here. Both Dodge and Whippet continue to continue on and seem to be improving with every mile possibly because we have now slowed the pace by around 5 mph to around 35, this requires less fuel, less heat and not much more overall time.
An initial search in Xichang found a mechanical shop who were unwilling to do the work but sold us a special copper coat high temperauture head gasket spray, something I had not seen before and but they strongly recommended. So the head was removed again to find a small crack had also developed in the block from the water way, which I drilled to stop it propagating further. We annealed an old copper gasket on the primus stove in the hotel car park and torqued the head down again using copper coat gasket cement to 65ft/lbs. This did not fix it to my satisfaction so we by-passed the mechanical work shop and went to the machine shop directly.
These guys were well fitted out with mills, lathes, presses and most importantly, experience. They also had a mechanical and spray shop next door where I did the work with assistance from the local boys. I cannot say I enjoyed the work but I did enjoy working with the enthusiastic Chinese lads. The Whippet suffered the indignity of being towed through a busy town by the Toyota to this shop. On arrival the head mechanic recommended patching the block by cold welding a thickness of shim metal over the depression in the block in stages which we ground down slowly by hand with a grinding wheel. This I had never seen before but it seemed plausible. We rubbed in the valves on two and three, and had the radiator flushed and reassembled. I poured in my supply of new oil, only to find gas still in the coolant. Not too happy I may say. We then torqued the head down to 50 ft/lbs and stripped two threads in the block. We removed the head once again and used the 7/16 helicoils and new set of head bolts I had brought with me. Torqued the head down to 70ft/lds and, at last, no gas in the exhaust.
On a rigorous test drive with my delighted Chinese offsider in the passenger seat we found still too much heat but basically acceptable if not driven at full throttle even on this quite hot day. I retarded the ignition somewhat although the engine was not pinging this seemed to help too. We had only flushed the radiator as I would not let them strip the top tank off and rod it, and was still quite concerned about the stop leak (I had put in in Australia) stopping flow in the radiator.
After dropping down into the Taklimakan some 2000m we have reduced speed and the whippet is returning 7kms /lt which I think is consistent with what this car can do. Unfortunately I think I can hear a big end knocking at low revs and the engine is using a pint of oil a day on the long runs across the desert and some blow-by is evident in the breather.
We have now run out of the Penrite 40-70W oil and have changed over to a synthetic 20-50W, oil pressure is still good at 30psi, but the knock still( just) audible, and we will see what the usage is like (just put in a Wynnns product) climbing out of China tomorrow. The water pump requires a tighten every day or so but all else is fine, gear oil still fresh (now nearly 6000mls travelled) diff oil black but full, rear uni will not hold oil but quiet and cool running, front uni greased, thrust bearing talks occasionally, the timing chain is just audible. So lets hope the next 500mls are as uneventful mechanically as the last.
I think everyone enjoys driving the little car which responds well when required to keep up with the better pulling power of the Big Dodge and handles well on the tight steep roads.