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05 5.3L oil pump and timing chain/tensioners recommendations

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10K views 6 replies 4 participants last post by  relentless85  
#1 ·
Looking for recommendations on what brands to buy for an oil pump and timing chain/tensioners for my 05 5.3L LM7 Silverado.

I want to buy good reliable parts. I know Melling makes a high volume oil pump for the 5.3L and I will be considering that heavily if I need to replace my oil pump. Any other suggestions for oil pumps? Is the high volume oil pump too much? Will it cause damage to something else inside the engine since the motor is stock internals?

As far as timing chain/tensioners, I have no idea on what brand to go with. Is there a kit that someone makes that has all the parts needed for a timing chain replacement? I figure if I'm going to replace the oil pump, might as well change the timing chain. Or do you think that's over kill? The engine is approaching 150k miles.
 
#4 ·
I went with a Melling when mine went out. I do like OEM when I can get it and the price is very comparable to aftermarket. I had mine fail all of a sudden and had to have the part that day. Was going to be much cheaper to grab on from my local parts store vs the dealer. Prices look very comparable buying online though.

Doing quick research at the time...it seemed recommended for a high mileage engine to go with the high volume pump (not high pressure). The parts store did not have any in stock, so I had to get the standard volume pump. I did not replace the timing chain or tensioners.
 
#5 ·
The chain isn't broken. Unsure of the guides/tensioners until the cover is removed. Jus figured that I would replace them if I need to replace the oil pump since the cover and everything else is already off.

I watched a video on replacing the oil pump and chain. Looks likes it's not too involved? Line up the mark on the large sprocket and the other mark on the cam? Then remove the large sprocket and chain/tensioners/guides.

Is there a write up somewhere that gives specific directions on how to replace the timing chain? I ordered a Chilton a manual but would like something more specific if available.

Im looking at the M295HV Oil pump. Says it's recommended for higher mileage vehicles and process 18 percent additional volume.
 
#6 ·
I would say it is pretty straight forward and between watching a couple videos and having a service manual...you should be good.

I see you have a 2wd which will make things a little easier. The best thing to do is to drop the oil pan when doing this. I tried to crack mine open to get the pickup tube bolt out. Was still a huge pain removing and re-installing and then ended up having the oil pan leaking. I recommend a new gasket and be sure to use RTV in the four corners as recommended for good seal. I think all you will need to do is drop the cross member and probably lower the steering rack to do so. I just removed the steering rack bolts and let it go down as far as it would and then was able to pull the pan.