02-01-2002, 05:54 PM
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CC Member
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Join Date: Jun 1999
Location: Livermore,CA,
Ca
Cobra Make, Engine: Arntz/Bennett, FE with lots of shinny parts that make it go fast
Posts: 907
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Not Ranked
Interesting thread. Earlier in this topic the subject of air no being bleed as a possible cause the overheating came up. Having worked on one of the more heat sensitive, overheaters for a number of years the Jaguar, I would like to pass along a few trick we performed to ensure that we had purged all air.
1) Important-Create a high point in the cooling system for air to bleed off to. If there are too many points at the same elevation then air is more likely to get trapped. Lifting the front of the vehicle generally helps depending on where your high point is located.
2) If you have a heater turn it on if it uses a valve to allow water to flow through the core. This again is a common place for air to get trapped.
3) (This part can get a little messy if you get a big air pocket) Fill the system and leave the cap off or loose. Start the engine and let it come up to temp. Air will burp out while the engine is coming up to temp. When the engine reaches temp bring the revs up to 1200-1500 rpm and *hold it there* This will force most remaining air out , *with the engine still at RPM* top up the coolant and tighten the cap.
This process has alway worked for me hope it helps.
Mike "monster"
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