Lifter Galley Bypass Line

Would it be a good idea to install a lifter galley bypass line even with t/a grooved cam bearings. uzzled:

 

bypass

Hello, i've heard that you should not do it. Maybe someone with more knowledge will chime in with a reason.


:3gears: :3gears:

 

I will not use it. I hear that it will also take away oil from the main bearings in some cases. I will just install the grooved cam bearings thanks for the info guys. Also i got my new poston Hi Rev Lifters and they are mismatched 12 of them are the same and 4 are of a different type. The push rod holes are smaller on the 4 and they have the side rings in a different location from the rest of the lifters. So i am going to send them back anybody else have this problem with these lifters.

 

The side rings designate the manufacture. They should all be for either 5/16 or 3/8 whichever you ordered. All of that style requires complete disassembly, cleaning, and deburing before installation.

 

Thanks Earick Racing.

Thanks for the info on the different type lifters. I have 4 that are 5/16 and 12 that are 3/8 and when i put my 3/8 push rod in them and push them down by hand the 5/16 ones are easier to push in than the 3/8 ones and they seem to travel in further too. Thanks Billy. :TU:

 

Hey, i was reading this about the Poston Hi-rev lifters and needed to chime in.

I just used them in my rebuild and my cam wiped out on breake in. I never bothered to check any diffrences on the lifers just assuming that they were all the same and I just sent the cam back yesterday to Hopefully have it replaced by poston. My shop and myself beleive the lifters were bad because only a few lobes wiped out and burnt the cam bearings closest to them. does anyone think that if I had mixed matched lifters it would cause this problem? Oh, i also have non-grooved cam bearings and a by-pass line.
Thanks~Vinny

 

Vinny....NOW is the time to change that since you're pulling it all apart anyway.

 

ya know, i wanted to use the grooved cam bearings but Tony, the tech, froim Poston insisted on me going with the Hi performance cam bearings and a by-pass line. If i decide top use the grooved cam bearings when i put it back togeather I have to remove the by-pass line, right ?

Thamnks ~vin

 

....but its easy enough to plug if your swapping to the grooved bearings. I ran the bypass for years but pulled it off the last time my motor was out and I changed to the grooved bearings.

I would ask Tony why he suggests this and then call TA and ask the same question. Does Poston sell the grooved bearings ?? That could be a reason for his advice..... o No:

 

Grooved cam bearings.

Poston does not sell the grooved bearings. I sent the mismatched hi rev lifters back to him and i am thinking of trying the comp cam pro magnum lifters. I hope they send me a complete matched set. :bglasses:

 

I know Poston used to sell bearings with a small groove on the back of them that looks like it was done with a die grinder. I have them in one of my engines. It doesn't look like it would flow that much volume. I wouldn't worry about using both. They have sold that oil bypass since at least the early 90's when I bought mine. The grooves on the back of the TA bearings look like they are machined and would flow at least 3x the volume. I am pretty sure they are a little wider to.(not at home) A very high quality piece. I figured cam bearings are not something to mess around with cosidering the time & money it takes to take apart and fix. (been there done that) So I bought the teflon ones. I am not praising or putting down any company. But certain products are plain superior to others wether they are a major buick supplier or not. I have never had a return problem with Poston. But I think they have a new owner now. Just my 2 cents. Best of luck! :TU:

 

yes,poston has new owners,my last experience was not good. my headers had poor
chrome plating,one collector flange was welded on crooked, wrong parts sent,etc
i won't go back there,TA performance gave me excellent service,and parts

i have used the bypass line for years with no problems

 

I bought some ceramic headers from TA. They were by far the best I have seen. Build quality was A1. However, different Buick venders have different return policies. Some make you wonder if they have one at all. Being out in left field building a Buick is tough enough. When you get some poor quality merchandise that you are stuck with it belittles you. It just ain't right.

 

The galley bypass line is not required with grooved cam bearings. It's purpose was to insure oil to the driver's side lifters in the event of a front cam bearing wear or failure.
Many years ago we supplied bypass lines and grovved cam bearings to Poston. He (Jim Poston) decided he did not want to spend the extra $10 or so on the bearings, He had something like 3 guys still have bearing failures out of several hundred sets we had done for him, don't know to this day if the bearings had been installed correctly or not, I know one set had not been because I got that set back and could see they had been installed with the oil hole in the stock location.
We used to do the bearings on a bridge port, they had a "T" shaped groove in them.
Once Poston stopped selling them, it was no longer feasable to have them done at the time, we had to do almost 100 sets at a time. By then , grooved bearings were becomming available through a couple of different sources, so we just started buying those instead of doing them ourselves. I tried to talk Poston into them but he would not go for it.
So it has come down to this, they don't sell grooved bearings , so of course they won't recommend them. Poston's does not build engines, they sell parts.
When the new owner took over, he decided he did not need any tech advisor any more , so my services were no longer needed there.
(they still call me for advice though) ou:
And now you know the rest of the story. Jim Burek P.A.E ENTERPRISES

 

would it, or could it hurt anything if you have both the grooved bearings and the bypass line?

 

It would just be a redundant system. I have known of people that did both with no troubles. If you use the grooved bearings, which I would, there would be no need for the bypass line. Jim Burek

 

Is the oil bypass line similar to what was run on the Cleveland Fords?

Any pics available?

I've been told that most rod bearing failures in the BBB's are to #8 rod journal.
That due to the pressure difference front to rear.