About Us

Va68goat · 08-17-2019, 08:35 AM

ponjohn,
We've done that numerous times and the signature has always been in the same location. It's always been around the distributor. My buddies have always believed that it's in the lower end of the motor.

Va68goat · 08-16-2019, 04:41 PM

Here is the video that we took BEFORE the vacuum leak was fixed at the intake.
https://www.youtube.com/watch?v=Gbt6ai8AI3A

Here is the the video that we took AFTER we replaced the intake gaskets and the vaccum leak was fixed. The idle is a little higher than I would like. This is around 1,000 RPM at idle. (knocking noise still present)
https://www.youtube.com/watch?v=Yq50JqWYRqQ

Mike Davis · 08-15-2019, 04:35 PM

Any updates on this????

GTO JONES · 08-15-2019, 04:42 PM

Quote:

Originally Posted by Mike Davis

Any updates on this????

Yeah same here.

Formulas · 08-16-2019, 05:49 PM

Have you taken the PCV valve out and put your thumb over it while running yet?

.

Va68goat · 08-17-2019, 07:33 AM

TedRamAirII,
We checked the valley pan for witness marks several times and I imagine Paul recently checked when he broke the motor down. As for being catastrophic... I hope not but it sure sounds terrible. It's bad when someone hears the motor for the first time and their first question is "Why is it knocking like that"? There's just no way I'm willing to live with that knocking noise.

Va68goat · 08-16-2019, 07:22 PM

Formulas,
Yes we tried that and the knocking noise was still present!

Sent from my SM-G955U using Tapatalk

Va68goat · 08-16-2019, 08:03 PM

Mister Pontiac,
I have to disagree with that. I have too much money and time invested in this motor to accept a motor that knocks. There's something wrong with this motor and the last thing I'm going to do is drive it. The knocking noise needs to get identified and repaired.

Sent from my SM-G955U using Tapatalk

promptcritical · 08-16-2019, 08:07 PM

Take it out of the car and disconnect “everything” and run it on a test stand so you can get your hands on all of it. That’s a possibility and at least does something to try to diagnose it. Then you’ll know.

ponjohn · 08-16-2019, 08:25 PM

Quote:

Originally Posted by promptcritical

Take it out of the car and disconnect “everything” and run it on a test stand so you can get your hands on all of it. That’s a possibility and at least does something to try to diagnose it. Then you’ll know.

I agree.

ta man · 08-16-2019, 11:39 PM

Quote:

Originally Posted by ponjohn

I agree.

I agree.....but to be brutally honest..this shouldn't be on you to figure out..its the engine builder..he screwed up twice. I'd pull it drive it to his door step drop it off..give him a month to make it right..or close the book on the deal.

72LuxuryLeMansLa. · 08-16-2019, 08:50 PM

Quote:

Originally Posted by promptcritical

Take it out of the car and disconnect “everything” and run it on a test stand so you can get your hands on all of it. That’s a possibility and at least does something to try to diagnose it. Then you’ll know.

https://www.amazon.com/Larin-METS-1-...s%2C270&sr=8-8

This one is worth every penny!

Gary H · 08-16-2019, 09:13 PM

I know this isn't much help but it sounds like valve train noise to me. Have you tried removing one plug wire at a time while it's running to see is the noise changes on a given cylinder?

TedRamAirII · 08-17-2019, 07:19 AM

Quote:

Originally Posted by Gary H

I know this isn't much help but it sounds like valve train noise to me. Have you tried removing one plug wire at a time while it's running to see is the noise changes on a given cylinder?

I agree Gary, its too slow of a knock to be Crank Speed Related. I stated long ago to crank it up cold, and get a hand on the engine and FEEL for the knock, Valve covers, Valley Pan, Etc. It has been stated by people here,in the know, that its near the rear/ Distributor area. The Valley Pan is the only item near the distributor that could transmit any cam speed rhythmic noise. 20 minutes and that valley pan could be off. After the engine being apart, I cant imagine it being anything "catastrophic".

ponjohn · 08-17-2019, 08:25 AM

Quote:

Originally Posted by TedRamAirII

I agree Gary, its too slow of a knock to be Crank Speed Related. I stated long ago to crank it up cold, and get a hand on the engine and FEEL for the knock, Valve covers, Valley Pan, Etc. It has been stated by people here,in the know, that its near the rear/ Distributor area. The Valley Pan is the only item near the distributor that could transmit any cam speed rhythmic noise. 20 minutes and that valley pan could be off. After the engine being apart, I cant imagine it being anything "catastrophic".

Do it with a long screwdriver with the handle in your ear.

TedRamAirII · 08-17-2019, 03:50 PM

I would think, disabling a spark to each cylinder and NO change, would rule out a Wrist Pin. But I think its a Wrist Pin.

Va68goat · 08-17-2019, 10:19 AM

Mike Davis,
Definitely not hitting the breather. When we ran the motor last weekend, we pulled the breather off and the knocking noise was still present. We checked the breather early last year as well. We checked if the lifters were hitting the valley pan several times and that wasn't it. I'm pretty sure when Paul had the motor apart this last time, he would have looked for that. The rockers are not hitting the valve covers. We checked that that last year and Paul checked the clearance prior to even sending the motor the first time. That is why he suggested the thicker valve cover gaskets.

HWYSTR455,
No way to the breather. That was checked several times. I think all the easy diagnosing has been done. It's been 2 years and no matter what, the same knocking noise has been present. There was no way to hear the knocking noise while it was on the dyno in Arizona with no mufflers. This is becoming like Groundhog Day.

Va68goat · 08-17-2019, 09:26 AM

HWYSTR455,
I doubt it's the valley pan. I think you even looked at that along with a few other guys and Paul looked at it several times. The only common denominator with the guys that have have been helping me with the motor is that none of them have totally disassembled the motor and inspected it. I don't think that's going to happen either because we already have over 165 hours on diagnosis time on the motor. Paul has been speaking to the guy they found to look at the motor so I'm hoping progress will be made.

What did you see in the video what makes you believe there is a miss?

Mike Davis · 08-17-2019, 09:54 AM

Quote:

Originally Posted by Va68goat

HWYSTR455,

What did you see in the video what makes you believe there is a miss?

It's obvious there is a miss. Watch the movement of the engine in the video. Every so often it shakes more than just a cam lope.
To me it sounds like valvetrain clearance noise. Either the lifters contacting the valley pan, rockers touching the valve covers etc.
With the breather in the rear of the valve cover have you checked to make sure they are not contacting the rockers?

HWYSTR455 · 08-17-2019, 10:03 AM

Rocker contacting the breather. Hm. You know, I don't think anyone has ever checked the breathers for contact, and I know those breathers come with their' own grommets, and do appear to hang down into the cover more than others I've seen.

That's easy enough to check Joe, pull that one out on the passenger side and see if there's any witness marks. Dang, wouldn't that be an easy fix.

Yes, in the vids it's obvious there's still a miss. Engine shake is the dead giveaway.

.

Menu

About Us