PlymouthBarracuda

I've replaced starter motor 2 times already. I made a blanket heat shield from the piece of tarpaulin but it doesn't help.
Anyway thanks to God that it's not a bearing sound (but it present), I will make a video again when car will be lifted

01CamaroSSTx

iTrader: (3)

No rod knocking present that I could hear, just normal valvetrain noises. I'd remove the serpintine belt and start it up momentarily and see if it quiets down some. Those idler and tensioner pulleys can make some awful noises when they start going bad.

PlymouthBarracuda

Just in case, could anybody please advise where to find this. How thick should the L99 crankshaft be? I mean the place where the connecting rod sits on the crankshaft..

01CamaroSSTx

iTrader: (3)

2.559 inches main journal
2.100 inches rod journal

PlymouthBarracuda

Thanks a lot ! As a preventive measure as this part is a consumable. Please correct me if my reasoning is wrong.
Factory reference rod journal size minus measured size = desired connecting rod bearing size.

At what difference I can put the standard size of the connecting rod bearings? (I can't replace main journal bearings by myself without pulling engine).

01CamaroSSTx

iTrader: (3)

Standard size bearings for 2.10 journal. If the crank was machined/polished down to 2.090 then a 0.010" undersized bearing would be used. Oversized bearings are used when the block has been machined or line bored oversized.

PlymouthBarracuda

Thank you sir, i will follow standart size of bearings. I am going to order Mahle tri-metal p series

PlymouthBarracuda

I am going to replace my standard oil pump with MELLING M365HV (20% Additional Volume Over Stock Oil Pump) because of (suspected) wear of crank bearings to increase oil pressure.

Is it mandatory to replace oil pickup tube for larger size ? Can stock pickup tube provide necessary oil flow for this pump ?

G Atsma

The present tube is will easily handle the larger pump.

grinder11

iTrader: (1)

I hope you're correct on only 20%. Reason being there's a recent thread here somewhere about someone using the hi-volume used for.....AFM? Anyway, he was pumping his pan dry because the factory pump was around 40% more volume. Never mind, lol, I see you're going Melling and not an OEM pump. Have you considered the Melling 10296? As Atsma said, P/U tube will be fine either way, as long as the O-ring is fine!!

PlymouthBarracuda

in January I replaced OEM oil pump and installed Melling M365 (for vin J). Everything were OK oil pressure was 26 idle. The issues with oil pressure started in summer only and I found that if the oil temperature rose to 225F with a quiet ride (often on the highway), then the oil pressure shows excellent 26-27 psi, as on the picture in the attachment below. If I drive in the full throttle mode or in the hard traffic in downtown then oil pressure drops to 14-15 psi on idle. Oil sender unit is OEM, filter was cleaned.

No, I considered the MELLING M365HV (for vin J), +20% Volume. As I know, the oil volume makes oil pressure in the engine
So you state that if high volume oil pump is installed I will drive without oil in the oil pan ?) I don't use AFM in 99% of driving, I use it only on highway between the states because in gives me 33,6 mpg at 47 mph

G Atsma

The high volume Melling pump (or anyone else's for that matter) will NOT suck the pan dry. The increased volume isn't enough to even come close to that.

01CamaroSSTx

iTrader: (3)

I would agree with this about the HVOP. I originally had an Fbody pan on my LSX build which has HVOP but it didn't like the 1/4" pickup tube to oil pan clearance. Oil pressure was near 50psi at idle and over 60psi at 2,000 rpm but would fall off to near zero at WOT. I could have made the Fbody pan work but ended up going to a larger capacity pan with an oil filter relocation kit.. With the new pan I measured 3/8" clearance between the pickup tube and pan and the issue was resloved. Consider bearing clearances and oil weight when it comes to oil pressure. Running 15w40 or 20w50 in an engine with 0.021-.0025 bearing clearance with a HVOP may not be such a good idea but one with .0027-.0032 would be okay.