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jhadler |
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Long term tinkerer... ![]() ![]() ![]() Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 ![]() |
Hey all,
Starting a new thread here... I'd like to get some advice please. Here's the scoop: New motor. 9:1 2056 w/ceramic coated euro race headers. Stock D-jet and stock ignition. Running on Brad Penn break-in oil. Two shake down drives for break-in (varying rpm and load, staying out of WOT and mostly below 4k rpm), and they both have the same basic symptoms. The oil temps get too high and idle turns to cr*p. Drive one: 75 degree ambient, 40 minutes driving. head temps vary between 250-275, never higher than 300. Oil temps climbed to 230, and once hot won't idle worth a damn. - backed off ignition advance to stock, was running at 30 degrees. Capped vacuum retard hose, seemed to idle better without. (mistake?) Drive two: 85 degree ambient, 25 minutes driving. Head temps vary between 250-300, never higher. Oil temp went to 250. Hot idle just plain sucked. I know I need to get a wideband on there to figure out what the mixture is doing, but if the mixture was going lean, I'd expect to see excessive head temps right? Can the oil temp simply be a tight motor on light oil? It doesn't seem right though. Help? Advice? Suggestions? Last thing I want to do is lunch this motor. -Josh2 |
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r_towle |
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#2
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,599 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
the retard hose gets connected to the throttle body.
The hose gets plugged . The port on the distributor is left open to the air, not plugged. If you have run it for two runs and did a classic 20 minute break in at 2000 rpms to get the camshaft seated, then I , in my humble opinion, would change out the oil now to 20/50. I may get yelled at for this but I run the motor with the break in oil for 30 minutes, then change the oil. Its at that early time that all the little bits of foreign matter, cleaning solvents, contaminants get mixed up in the oil....so get it hot and dump it. I pull the sump out also, and the taco plate to get as much of the oil out as possible... New gaskets, new oil...then drive it like you stole it. If it is gonna break...its gonna break. RIch |
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