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Bobmspeedster
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1966 2.0 rebuild
Just took motor back to rebuilder for 500 mile checkup after complete rebuild.
The PO had changed to 2.2 PC's, the heads were redone and the cly's sent to machine shop. Mechanic and Machine shop said all look good and put on new rings. Yesterday after compression check , cylinders 1,2,5 had 130, #6 120 and 3 & 4 had 110. He did a Leakdown and found # 4 had 30%. He say's it is the rings. He wants to pull out and redo. He is suggesting a different PC set? The motor was initally rebuilt because of high leakdown. Any ideas what should be done so that this does not happen again? I am not a motor rebuilder so relying on his expertise. Would appreciate ideas from the birds. Thanks Bob M |
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03-22-2013, 05:25 AM
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Registered
Join Date: Jun 2006
Location: Virginia Beach
Posts: 556
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If you live in beautiful Northern California, take a few mountain pulls, dropping just below peak torque and in a taller gear and put some load on the motor. Might load the rings enough to seat.
You also have a few nice shops up that way that could put it on a chassis dyno for some break in loading. Good luck and keep up posted. The psi in all cylinders seem a little on the low side.
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Rusty 71 911E 55 PreA speedster 85 Turbo look Cab 62 Twin Grille Roadster (getting close) |
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03-23-2013, 11:28 AM
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