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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> awful racket under the hood
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red rat


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awful racket under the hood
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This morning going to the car show in Lindsay, I was almost parked and a noise started. At idle is was a loud tick, and got exponentially worse with a little throttle. (This is a 454 LS6 crate engine.) I sure got lots of opinions on what is was, from a bad plug to a fuel pump to a bent pushrod. I decided to get my trailer and haul her home. I'm leaning to the bad pushrod diagnosis, getting someone to have a look tomorrow.

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87 player bird


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Same thing happened to my buddy's fat block. happened within 3 hours on the first start-up.

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unclebernie


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I had a tick with my Pontiac motor, only noticeable when it warmed up. Turned out to be a bad camshaft lobe. Lets hope yours isn't.......

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John

1972 Pontiac Lemans (daughter's car) 
2005 Pontiac Grand Am
2004 Ford Explorer Sport Trac
pontiax


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pull the fan belts off, to eliminate accessory noise, find a broken hockey stick with a pointy end , put your ear against the none pointy end and use as a stethoscope, move along the valve covers and distributor, cheap quick diagnostic to see how far you have to pull things apart.

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pontiax- (canadian pontiac X frame)1964 Parisienne 2dr. Hardtop ,lagoon aqua metallic (Q) ,421 cid Dart Industries block and heads. 550 hp. 575 ft lb  of torque.

 
4SPEED427


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Do you know about the trick to pinch off the fuel pump inlet hose to diagnose if that's the noise? Very very quick and easy, something you can do on your own to at least verify if that is the problem.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
pontiax


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Carl Stevenson wrote:

Do you know about the trick to pinch off the fuel pump inlet hose to diagnose if that's the noise? Very very quick and easy, something you can do on your own to at least verify if that is the problem.


does the noise go away when the fuel bowl runs out?

lol



-- Edited by pontiax on Sunday 18th of July 2010 10:16:36 PM

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pontiax- (canadian pontiac X frame)1964 Parisienne 2dr. Hardtop ,lagoon aqua metallic (Q) ,421 cid Dart Industries block and heads. 550 hp. 575 ft lb  of torque.

 
4SPEED427


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laughing.gif Well yes, I guess it does then too but the idea is to pinch the inlet hose at the pump with something like a vice grip (make sure the jaws are taped or something so it doesn't cut the hose) and if it's the pump rattling the noise should disappear.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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rabbit64cs


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sounds like the noise I had with my BBC , bent pushrod on # 2 cylinder, happened to 3 pushrods until I went to roller tip rockers?? all on that #2 cylnder.

here's hopin it's something simple !!

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red rat


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I was at work when the mechanic phoned me about the engine. He says it's in the bottom end, will have to pull the engine this week. I need to find a good engine rebuilder within an hour of Lindsay, maybe Parry Automotive in Orillia. Has anyone used them?

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427carl


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How old is Crate Motor?   Sounds like you should truck it to the shop Ray uses in York



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red rat


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The engine was bought new from GM in 1992. It has no more than 7500 miles on it. I've only had it for less than 1 year.

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427carl


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So much for Warranty  lol     hopefully its something very repairable  wise to trailer it home..

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73SC


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427carl wrote:

 

How old is Crate Motor?   Sounds like you should truck it to the shop Ray uses in Scarborough


Bottom end is usually an oiling problem.

Expert Engines. Yes he built me a very very good 5.8 Vortec. Just passed 10,000 Km since January rebuilt, gets stronger every day.

http://www.expertengines.ca/

 Call Tony and see what he says. I find his prices very reasonable too. He does warranty work for the GM dealers in Toronto. There is always half a dozen Cadillacs there getting new Northstars.




-- Edited by 73SC on Monday 19th of July 2010 11:42:48 PM

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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

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red rat


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Unfortunately it was an oil problem, something that should be preventable. I had spent a lot of time replacing the oil pan gasket, as well as the valve cover gaskets. I thought I had the problem licked, should have checked it more often. It lost half the oil in 300 miles, way worse than I realized. I have no clew where all that oil went, except for undercoating the floor pan, right side. Very expensive lesson to keep a closer eye on the oil level.

Still wondering if anyone has used Parry Automotive in Orillia, they advertise doing vintage engines, know of one person that was quite happy there. I know Matt from Lindsay Driveline, he did my old 261 Pontiac engine, would likely be happy with him too.

-- Edited by red rat on Tuesday 20th of July 2010 05:21:53 AM

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73SC


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Leo, you are right about an expensive lesson but hopefully your experience will help us all. I know when I drive my old car only 300 to 500 miles a year it is easy to ignore the oil, I mean it would take 6 year driving to get to 3,000 miles a normal change interval.

I make a habit of checking the levels weekly on my old car, usually Saturday morning and on my newly rebuilt Vortec I am very consciencious, plus changing before 5,000 km to keep warranty valid but good practice anyway.

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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 

 
Ghost Post


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So sorry to hear of your troubles!.
Here's another suggestion for an engine builder..
Johnny Stefko has years of experience building all motors including those of many big time racers also's a great guy too!.

Stefko Racing Engines
11940 Highway 48
Stouffville, Ontario
L4A 7X5

Phone: (905) 642 - 6289

email: info@stefkoracing.com


smile.gif

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ARCADIAN


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A friend has a built and oiled 462 street engine for sale, asking price is $3500

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