Technical Oiling issues on Small Journal 327, no oil pressure at idle

What port are you using to get your pressure?

 

It's also with a cordless drill at probably 400-500 rpms.
Both ports read the same.

 

I feel the pain in a different sense. There's the one right off the top even before installing them. The instructions state. "Be sure to check lifter bore for excessive clearance". Then there's a lifter or two that likes to bleed down every now and again and takes a few miles of slow driving until it pumps back up. That's been an issue since day one. And I'm not the only person that has this issue with Hyd. Rollers. Mine is a retro fit as well. All thing combined has had me thinking I should of went Solid Roller. I'm not saying you should do that. I'm just sharing the pain of doing what we do.

 

I would go back with a conventional hyd cam if I could do it without changing springs. I was trying to mitigate any lobe wear issues due to the lack of zinc these days. Trying to reduce maintenance.....

 

What springs do you have now? They might be too much pressure for a flat tappet.

 

I'm sure they are.
https://www.summitracing.com/parts/hrs-98213

But oddly enough, here are the springs recommended for the cam I have in the attic.
https://m.summitracing.com/parts/cca-981-16

 

Personally, I have no first hand experience with hyd rollers. And after what I have heard about them from engine builders I respect that do have first hand experience with them, I never will...

 

Yep
No better way to ruin a 900 mile trip to Bako than to have the axles go tits up in a new set of Crane hydraulic roller lifters half way there.
Troubleshooting what was thought to be a throwout bearing chirp in a Walmart parking lot at 10:00 pm and discovering your new 468 BBC is shitting itself is no fun .
Hello Lunati.

 

Another well known brand that I'm running did that but I found it before anything bad happened. Called the cam company to say I was going to send it in to have them put new roller and axle. Here's the reply. "We don't rebuild Hydraulic Roller lifter's. Only Solid's". So I had to buy a single set of roller lifters.

 

This makes me a little nervous. What kinda life are you getting out of them? Granted I am not running a very aggressive cam.

 

Root, I still think the problem is the rear cam brg.

 

Why? I have flow the size of your finger in the oil galleries. I may try and pull the cam and look to verify.

 

If the cam is still in and you're spinning the pump with a drill I can see why you still have oil flowing. I know that checking the cam brg will require pulling the pan,, but you are almost there already.

 

The pan is basically loose, just a couple of bolts holding it on. I am curious why you think it still has a bad bearing? No arguing here, just trying to figure the logic.

 

The future hasn't arrived so no worries. Let things come as they will. Also, one does not become Master with self without experience.

 

I'm tired of experience.....

 

Babyearl thinks according to his earlier post the the rear cam bearing may be out of position. I say it's possible but probably not.
I think your original problem was related to the relief valve in the HV 55 pump being damaged by welding or poor quality in general and WAS NOT FULLY CLOSED.
My hunch is that the problem is fixed with the new pump. I still question the hydraulic roller tappets restricting oil. I don't think you are exposing the oil groove either with the cam lift you have however lifter bore to lifter clearance needs to be around .0015" any larger and you will start to bleed off oil pressure.
Personally I would not run a hydraulic roller set up. I would do as many checks as is possible especially checking the main and rod bearings while keeping an eye out for any debris and replace them if needed. Check the crank oil holes for debris as well.

Once you are satisfied that the bearings are in good condition and there is no debris. button it up and fire it!

 

Did this get resolved?

 

I hope so. I took the thing back apart and checked cam bearings etc. All looks good. I started at the back pulling lifter from each hole checking the flow with the new Milodon standard volume pump. I would check each hole as I moved forward, ensuring that I had plenty of oil, which I did. I had oil all the way to the timing chain and it was filling up the cups on the lifters. I also installed 2 manual oil pressure gauges. One on the front of the oil galley and one in the rear to check for differences in pressure. That all looks good. I put it all back together and I am building a test run stand. I just haven't gotten back around to it. BTW, I show 25-30 lbs oil prerssure with a cordless drill.

 

Remember also you must rotate the engine when priming to get the groove in the lifters to line up so you get oil to all.... It takes a while to get oil out of all pushrods. I soak all hyd. lifters in oil overnight before installing.

 

Yep, it was rotated. I am thinking it was the pump. I haven't removed the spring etc, bt that is the most likely culprit. I am gonna run the piss out of it on the stand to make sure.

 

Hawg
I bet some brewsky's will be in order when this fiasco has been put to bed.

 

I will definitely be glad to be finished. I know more about a sbc oiling system than I ever wanted to.

 

Had The same prob. with a BBC seems the new pump had an extra roll pin in FRONT of the relief valve after that I disassembled all pumps before installing

 

Root,, I'm happy for you,, I guess I would have lost a ton of money on that bet. Keep us posted after you fire it off.

 

I will.

 

Just read all the posts and hope the problem is fixed. I agree with some posts as well disagree with others. I have all my life had sbc and bbc street as well race. the rollers have restricters to limit oil to roller rockers (as needed for roller rockers) do not put restrciter in the block. (ONE OR THE OTHER) If you do, not enough oil will get to the rockers. You have to spin the pump with a drill with the pan off, stick your head under and see where the oil is leaking from. O also on the roller lifters there should be a slot or passageway to the cam roller for lube to the needles for the street. race rollers don't have this and rely on splash for lube. If you have 25 to 30 psi with a 1/2 drill at 500rpm you are there. The oil you see in the back drain hole could be lack of o rings for dist shaft or you are seeing the oil out of the pump relief. Hope this helps

 

Root how did it pan out. Did you get that run in stand done? Like to know the outcome.

 

I had exactly this happen as well on a 283. Had to pull everything and fortunately nothing was hurt. After redoing that, I had 40 to 45 psi at idle and the engine is purring still.

 

Be interesting to see if your whirring sound is gone since you changed the timing set. I think your first sentence pretty well pointed to the pump, "I fired it and it had no oil pressure". Hope you got it fixed. Lippy