|01-31-2013 09:59 AM|
|lg1969||Before you start taking it apart try to fine another distributor and replace it.|
|01-31-2013 09:54 AM|
|01-31-2013 09:40 AM|
|01-31-2013 07:17 AM|
|bigdog7373||Im pretty sure 5qts of 20w50 is going to be wayyy to thick. That's what we use for hydraulic fliud in our commercial mowers and the stuff is very thick.|
|01-31-2013 06:10 AM|
|Richiehd||Why are you mixing oil weights? You live in Florida, you have a motor that probably has a little extra clearance in the bearings. Use a 20-50W Brad Penn RACE oil if you need the ZDDP. or Valvoline VR1.|
|01-30-2013 02:31 PM|
Alright so I put 4qts 10w40 and 1qt 20w50, then my zinc additive which was surprizingly thick.
Cold idle neutral: 50psi, in gear 45psi
Hot idle neutral 10psi, in gear 6psi
Crusing at 50mph 23-26psi.
Not too bad. Obviously there is something wrong but at least I can drive it without worry now.
I'm thinking in the near future I will pull the engine and trans and sell them. Ive wanted to do an ls swap for a while plus I have a 4speed muncie that I'm dying to put in.
|01-30-2013 01:35 PM|
|bigdog7373||Going out now to change the oil. I'll post results in a few.|
|01-30-2013 11:33 AM|
pan gasket in car replacement
I use a roller cam so I would inspect the gear and back of the manifold. Maybe do a quick wash and detail before it goes back in. Thats just me though,,
|01-30-2013 10:35 AM|
|01-30-2013 10:32 AM|
|01-30-2013 10:09 AM|
Low oil pressure
I was a little struck by the fact that you stated your engine was bored .080 over. I was under the impression that a 383 is a 350 block that is .030 over with a 400 crank and flywheel...bringing the cubic inches to 383. If your block is .080 over you may never get good oil pressure. I believe the limitations on boring a 350 block border around .060 and that is pushing the cylinder wall dangerously close to being to thin. Those cylinder walls are surrounded by water jackets, ports in the block that allow coolant to dissapate the heat of the cylinders. Are you certain of the bore?
|01-30-2013 09:53 AM|
|vinniekq2||If you bother to change the oil pump,then add a bigger pan.|
|01-30-2013 09:46 AM|
low oil pressure
I agree with ap72. Dead on with his thoughts, as I was thinking the same. Besides, I've had alot of small block Chevys and they have always seemed to run a bit low on pressure at idle. As long as the pressure comes up upon acceleration to a reasonable level he should have no problems. But if the problem persists, dont ignore it
|01-30-2013 09:30 AM|
20psi at 1500 RPM is NOT that low. its below average for a new crate engine but many people have built engines with this pressure or less. I'm tempted to think he reused the oil pump and a worn oil pump will have such a poor seal that it will have little pressure at low speeds- the other option is that he is just running larger clearances, and at one time that was a VERY common thing to do.
I wouldn't go too much thicker and I'd give serious thought to buying a better pump (m155hv from melling is about $40 without the pickup, which is about another $10). You may have other issues (leaky pick up, clogged pick up, leaking oil main, etc.) but it is possible for everything to be fine and just have low oil pressure if you have large rod, and main, or lifter, or cam clearances.
|01-30-2013 09:23 AM|
low oil pressure
Just my opinion...but I think adding thicker oil to boost pressure would only be masking a more serious issue. Low oil pressure is an indication of an underlying issue. First, make sure your sending unit is functioning properly and then verify your gauge is reading correctly. If so, its time to open it up and check oil returns, pump pickup, oil pump...and then on to clearances. But don't ignore it. My buddy tried the thicker oil trick to boost pressure...it worked...until he made a pass at the track and it seems the thicker oil was unable to return to the pan fast enough at 7000 RPMs and "BANG". There are alot of details and steps involved to diagnosing your issue...but don't put a bandaid on it, please.
Just my opinion...no better then anyone else's
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