Starting Over, Engine Rebuild |
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Starting Over, Engine Rebuild |
Mblizzard |
Sep 10 2018, 08:54 AM
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#1
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Well as some may know, my 2.3 massively spun the rear main bearing. Even though I have not opened the case, the debris in the oil tell me that the crank and likely the case is gone.
I think I can reuse the heads and pistons and cylinders. But I am assuming all of the other internals are toast. Pulled the oil pump and filter and there was no visible metal in these but there had to be parts of that bearing coming off for a while before it failed. Any thoughts on trying to reuse crank, cam, and case? Or should I just start building from another case? This engine had 98 mm P/Cs on it. I thought I recalled that the largest P/Cs that could be fitted were 96mm without opening the case. |
Mblizzard |
Sep 19 2018, 11:52 AM
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#2
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Ok so now the process of thinking about new parts starts.
Current thoughts are to keep Microsquirt and go back with the 78mm crank and 98mm P/Cs. Have ported heads with 911 swivel foot valve adjusters, 44 mm intake valves, 36 mm exhaust valves, dual springs, and chromoly retainers. First thought cam shaft. Currently have the Eagle 2202 Street Power Cam - 278° Duration and 410" lift with 1.3:1 Rocker Arms. Reading the information for this cam it is really for carb use. But it did quite well with the Microsquirt. Looking through the various Web cam grinds I came across Hydraulic Camshaft, 91 Grind, (265 Duration, .430" Lift). Requires Programmable Injection and of course hydraulic lifters. Kind of like the thought of not having to adjust the valves but leery of hydraulic lifters in a Type 4. Also this is not far off the stock cam (268° Duration 378" lift) so with the other components in mind I would be potentially missing out on some HP. More likely options are the 86a - 290 Duration, .435" Lift and the 494 - 280 Duration, .465" Lift. Just looking for thoughts and suggestions. |
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