Save 5% at Vevor and Support Canadian Poncho!
Members Login
Username 
 
Password 
    Remember Me  
Canadian Poncho Homepage -> Canadian Poncho -> General Engine Performance Forum -> Lifter clatter ?, then it's completely gone. Hmm. Question.
Post Info TOPIC: Lifter clatter ?, then it's completely gone. Hmm. Question.
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10637
Date:
Lifter clatter ?, then it's completely gone. Hmm. Question.
Permalink  

Today after a brief burst up to redline through the gears in the 67, when I slowed back down, about a minute or two later while cruising a tick appeared and became pretty loud. Enough to be concerned, but not bad enough to stop. You could hear that it sounded a little different through the exhaust as well. Pretty sure it was a lifter or rocker sound. After a few kilometers it slowly went away (to my immense relief). Oil pressure never changed and I'm getting 60 at 2500. 20 at Idle. 10/30 VR-1. Engine was cool at 170 today.

It's never done this before, always been very quiet. The only difference is an oil change a month or so ago. It's a 496 with a Straub cam, Morel hyd roller lifters, aluminum heads and Comp rockers. 

Time to check the lash perhaps?  Any ideas? 

Thanks, Mark



__________________
 67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
 
SGS Welding


Guru

Status: Offline
Posts: 504
Date:
Permalink  

I had valve noise and it turned out to be the hardened tips on the old pushrods chipping and galling away!

I suspect you used better parts in your build but thats what I found in mine

ordered some new higher quality pushrods and my problem is gone now. 



__________________

67 Parisienne Convertible 

67 Parisienne 2 Door Hardtop 
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10637
Date:
Permalink  

Thanks Greg. Either way the valve covers will need to come off. They've never been off since the build in 2016.

The fact the sound went completely away leads me to think a lifter ended up collapsing enough to allow clearance, and pumped back up down the road. Either way, not nice for the roller, cam or rocker tip.



__________________
 67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
 
jmont64


Canadian Poncho Superstar!

Status: Offline
Posts: 6749
Date:
Permalink  

Well it is good that it went away. I did much the same thing a few years ago with my Corvette and its 350. Took a good run up to the red line and after finishing the drive I had a tick. It wasn't going away and I had to come back from Edmonton with it like that. Turned out I had a broken valve spring. Quick fix as they just charged the cylinder and swapped it out while on the engine.

__________________
Jerel
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10637
Date:
Permalink  

I had it back out tonight for a run. It sounds normal underhood, but strangely, the exhaust tone sounds different somehow. Still goes like stink when prompted, so no noticeable reduction in output.



__________________
 67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
 
DonSSDD


Canadian Poncho Superstar!

Status: Offline
Posts: 5737
Date:
Permalink  

I have read about some junk lifters, springs, push rods, and rockers being built in recent years. Do a search online for the part numbers you used amd see how f anything pops up. Cams too, and Comp components were included. Im in no way a knowledgeable in engine parts, only repeating what I have read from some very knowledgeable engine builders.



-- Edited by DonSSDD on Friday 17th of September 2021 06:31:05 AM

__________________

63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10637
Date:
Permalink  

Yes, I've read quite a bit about defective or even counterfeit lifter horror stories as well Don. My Morel street rollers were bought directly from Straub Technologies, who at the time promoted and stood firmly behind this brand. I even spoke to Chris Straub directly. So I figure (and hoped ) that I wasn't one of the unlucky ones. 5 years on without an issue, along with quite a few big pulls, I think I have good parts, and I spent a huge amount of time getting the rocker geometry right. But things do wear, and this was a roller retrofit into a vintage BBC after all.

I'm hoping it was just an anomaly. Maybe a piece of trash temporarily blocked the lifter orifice?

 

It's always nice to look back at the old build images though..

 28516118691_0053d22176_z.jpg26841330396_1bf52b6232_z.jpg



__________________
 67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
 
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Prefectca


Poncho Master!

Status: Offline
Posts: 1759
Date:
Permalink  

Could your noise may have been a piece of carbon that broke loose and then broke up and passed out through the exhaust?

Paul

__________________
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10637
Date:
Permalink  

No, definitely a metallic rattle. Actually, at first I thought maybe a header gasket.



__________________
 67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
 
65Camino


Uber Guru

Status: Offline
Posts: 3986
Date:
Permalink  

What is your oil level ?
When youre revving that high there is so much volume at play it might be spread thin.

__________________

Remember Fun,

 Remember Laughter ?
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10637
Date:
Permalink  

Deep pan. I think I have 6 1/2 liters in it. I'll check it. 



__________________
 67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
 
DonSSDD


Canadian Poncho Superstar!

Status: Offline
Posts: 5737
Date:
Permalink  

Just talked with someone who had a noise in his hellcat in a Durango. Had a noise, dealer said nothing wrong several times. Had a real mechanic say it was a failing lifter, dealer said bring it back in. It blew up on the way there.

__________________

63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
73SC


A Poncho Legend!

Status: Offline
Posts: 20261
Date:
Permalink  

cdnpont wrote:

Deep pan. I think I have 6 1/2 liters in it. I'll check it. 

 My 454 is very sensitve to oil level and after not being used especially. I get the same problem from time to time Mark, Always goes away with a top up of seafoam. I've been avoiding tearing into it.



-- Edited by 73SC on Saturday 18th of September 2021 12:53:56 AM

__________________

Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
65Camino


Uber Guru

Status: Offline
Posts: 3986
Date:
Permalink  

cdnpont wrote:

Any ideas? 

Thanks, Mark

 How did you make out with this ?



__________________

Remember Fun,

 Remember Laughter ?
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Canadian Poncho Homepage -> Canadian Poncho -> General Engine Performance Forum -> Lifter clatter ?, then it's completely gone. Hmm. Question.
Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.