Does oil pump have to come off?

[weSS1LEy]

For cam, timing gear, new chain, does the pump have to come off or no?

[gsxrturbo]

yes,to get the new chain over the crankshaft,pump must come off

[sixty9fordkiller]

yessir! crank snout protrudes through the crank gear, chain, and oil pump

[weSS1LEy]

Ok so good time to change the dampner to ls2 while changing to Melling is highly debatable

[Blueovalman]

Yes indeed change your dampner to LS2 and install a Melling high volume oil pump.

[weSS1LEy]

I believe my shop voted against the melling

[sixty9fordkiller]

Originally Posted by weSS1LEy

Ok so good time to change the dampner to ls2 while changing to Melling is highly debatable

'tis what alot of us did, good sir

C5.R timing chain, new crank & cam gear, LS2 damper and melling pump for me

[sixty9fordkiller]

Originally Posted by weSS1LEy

I believe my shop voted against the melling

the L99 cars are fine....its the LS3 ones that benefit the most

[Blueovalman]

Originally Posted by weSS1LEy

I believe my shop voted against the melling

The Melling high volume oil pump will work just fine on the L99 or LS3 your shop doesn’t know what they are talking about. I had a Melling high volume oil pump on a L99 and LS3 Camaro and I never had a Melling high volume oil pump fail on me after 100K+ miles and track/street abuse.

[weSS1LEy]

Hmm 🤔 yeah I’ll enquire about it. I think they said they haven’t seen any stock pumps fail.

[DSMer1]

The factory LS oil pump suffers from cavitation above 6,200 RPM, which results in a drop in oil flow of nearly 1 GPM by 7,000 RPM. This cavitation can also aerate the oil, which causes drops in oil pressure and can result in oil starvation. This is why we do not recommend shifting any higher than 6,200 RPM with a stock engine. Engines that run at RPM's above 6,200 should use an upgraded Melling pump to prevent these issues.

The Melling 10296 pump flows 18% more oil than the factory oil pump, topping out at about 8 GPM (versus approximately 6.8 GPM for the factory oil pump). The additional oil volume can improve engine lubrication, but caution should be used when selecting this pump for racing applications as the higher volume can sometimes accelerate oil starvation by pumping oil out of the oil sump faster than it can be returned. We don't recommend using this pump with the smaller capacity oil pans (less than 6 quarts).

The pump also includes a stiffer pressure relief spring, which increases the maximum system oil pressure by 10%. This higher maximum pressure can help negate drops in oil pressure caused by the addition of an oil cooler setup. The stiffer oil pressure relief spring can be swapped out for a factory specification spring, which is also included with the pump.

This oil pump is compatible with LS engines featuring Variable Valve Timing (VVT). This pump should not be used with engines that feature Active Fuel Management (AFM). Engines with AFM require a higher flow pump. See Melling part number 10355.

Features and Benefits

8.0 GPM maximum flow for an 18% increase in volumetric flow over most factory LS engine oil pumps and Melling M295 pumps
Includes a stiffer bypass spring for a 10% maximum oil pressure increase over the factory LS oil pumps, factory specification oil pressure spring also included
Compatible with VVT engines
Cast aluminum housing, CNC-machined and hard anodized
Iron cover, CNC-machined and phosphate coated
Compatible with factory GM oil pickup tubes/screens

Source

[charles71]

Not trying to steal your post but I have also been told to get a high pressure over a high volume pump due to high volume possibly draining the pan. Is this true?

[weSS1LEy]

Most of what I’ve read says high volume pump or stock. High pressure can cause stress on the seals. I’m no expert though. I see you have livernois parts... those guys are experts I’m sure they would know

[go_go_gadget88]

I replaced my stock pump while I did my cam swap, but I just went with a stock replacement Melling M295 (not HP or HV).

If I went with either, I would go with high volume over a high pressure. In theory, adding more volume to the same area (oil channels) in the same amount of time should inherently raise the pressure some. I would not be terribly concerned about sucking an 8 quart pan dry with a HV pump. I didn't think stock pressures were bad though, so personally I didn't have any hangups about this pump. I went ahead and shimmed it when I installed it to try and help avoid cavitation in the high RPM range. So far no issues, but admittedly I don't have very many miles on it since this swap a year ago.