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Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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    Jeep Grand Cherokee
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  1. I've just completed the coolant pipe job on my C'S. I'm going to replace all the coolant and distilled water hover does anybody know how to fill without a vacuum. Ive ran it with the old coolant and water tipoff to check the integrity to find that the top radiator hose isn't getting hot at all aven after almost an hours worth of idle, fast idle and revving up. The cabin heaters eventually got toasty hot but do cool slightly on tick over. I don't mind draining the system and replacing every couple of years to protect the internals (using more modern Prestone all car formula 150,000 miles or 10 years). From a mechanical point of view I never believe the lifetime fill done when it was made in 2004. Maybe it explains why Porsches have water pump failure. Oddly, in a million miles of driving only my first car failed in the first two days of ownership twenty odd years ago. Since then even the two Grand Cherokee are all original with Mercedes CRD i5 and V6 diesels. Where is the self venting or the bleed valve?
  2. After recently buying a 955 with the V8 which is whisper quiet with a full history, I decided it was a good idea to change the oil, filter and the plugs as it had only moved 400 miles in six months. The oil was a suggested Mobil 1 0w40 and the plugs are as identified by the reg plate. However, the Bosch super 4's that came out were R6 (resistance) and the BERU 4's were R5. ive not noticed a loss of power - but HAVE noticed a drop in my mpg figures. from 17-19 down to possibly 13-14. anybody else experienced this, the oil level is correct with a quality synthetic filter by K&N and the spark plugs were torqued to just on 22 ft/lbs. appreciate any feedback on your experiences.
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