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#1
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new here need help with a small block
have a 360 we keep hurting the bearings in with a 4 speed its w2 head motor 60 over 620 mopar cam it hurts mains on 2and3
what yall think |
#2
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small block help
need the history. what was done to the motor? lots of possibilities. by hurting, do the bearings look blued, chipped, scored? first thought is no oil to the bearings. with the caps off, use a pump primer to check oil flow to the mains. when motor was running, what was the oil pressure. was block hot tanked? did you check bearing clearance with plastigauge? was crank turned? are the bearings the right size? are oil holes aligned? does block need to be align bored? is crank bent? are the main caps in the right places? did the main caps come from a different motor?
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#3
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Quote:
seasons with a automactic with on problem motor was check for every think it in a 4 speed car leaves at 6000 on line shift at 7200 |
#4
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I hate to come off wrong here; however, it is hard to understand your posts without proper grammar, spelling, and punctuation.
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#5
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All of what Chirorod said plus......
Is sump baffled, oil surging away from pick-up? Do you run full circle main bearings? Is the pick-up sitting close to the bottom of the sump or has it been bent? Is oil staying in rocker cover and not returning quickly enough? |
#6
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new here
blue bearing says no oil to it. 60 psi is good pressure, but pressure not getting to those bearings or not enough clearance. check clearance with plastigauge. may be wrong bearings. upper half may be installed on bottom. crank may have bent. might have to pull motor and take it apart.
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#7
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No doubt no doubt!!!!!!!!!!
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#8
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As this isn't happening with the automatic, it tells me that your belhousing alignment isn't right. Watch this video from 10:45 remaining to 10:00 remaining. You'll see what I am talking about
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#9
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well sorry i must not be as smart or have the best grammer as yall but thanks for the help
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#10
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I'm also reluctant to offend you, but maybe it could be better explained how there's a problem understanding what you are saying.
Check this post you made: "they are blue and chip motor had 60 psi motor has been in another car ran 4 seasons with a automactic with on problem motor was check for every think it in a 4 speed car leaves at 6000 on line shift at 7200" I'll try to work out what that means exactly with only punctuation to help: "They are blue and chip. (The) motor had 60 psi. (The) motor has been in another car, ran 4 seasons with a automactic with on problem. (The) motor was check(ed) for every think *(everything). It (is) in a 4 speed car, leaves at 6000 on line, shift(s) at 7200." Nobody is having a go at you here, just trying to help you. I'm sure you can type in punctuation so your message comes out more clearly. Another thing is the bold word, on. I think that should be no, shouldn't it? Anyway, for what it's worth I think Ed has some good advice there. I was also thinking that with a manual you put more load on the thrust bearings when you use the clutch, are they in good shape? |
#11
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60 psi may be a tad low for 7200 rpm's according to the 10psi/1000rpm rule of thumb?
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#12
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Im pretty good at speaking gibberish... as I can tell the bearings are not getting oil or enough oil and heating and turning blue, that tells me you didnt gauge the bearing and crank, like plastic gauge. You need to have the main bearings turned and go with over size bearings. Have it turned my a good machine shop.
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#13
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Then why did this setup work without fail with an automatic and only began failing after the installation of the manual?
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