Sounds like a Lifter but it’s not - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1970 CST Short Wide** · 09-06-2024, 12:05 PM

Listened to a conversation at last nights Car Show about Injectors and Coils making noise that sounds like a Lifter.
Anyone ever heard of Or experienced this

**70STOVEBOLT** · 09-06-2024, 12:06 PM

I have heard an injector tick before and it does sound similar to a lifter, but more faint. Never heard a coil pack make that noise though.

**Steeveedee** · 09-06-2024, 02:25 PM

Maybe a coil pack if it was leaking to ground?

**HO455** · 09-06-2024, 02:42 PM

What engine transmission combination are we talking about?

Joyridin · 09-06-2024, 04:39 PM

My LS injectors made sounds you swear were from a collapsed lifter. They were aftermarket performance injectors though. I have never heard of a factory injector making that much noise.

**1970 CST Short Wide** · 09-06-2024, 05:52 PM

Quote:

Originally Posted by HO455

What engine transmission combination are we talking about?

I believe the guy had just done an LS Swap in his 72 Step. Don’t know the Engine size or Trans

57taskforce · 09-06-2024, 06:27 PM

LS engines as a whole are notorious for the “type writer” valve train sound. It’s just what they do. I’ve heard loud injectors before but not coils.

**Bob B.** · 09-06-2024, 07:36 PM

Quote:

Originally Posted by Steeveedee

Maybe a coil pack if it was leaking to ground?

That's what I was thinking. I have heard a number of bad coils on Ford trucks making a snapping noise.

**1970 CST Short Wide** · 09-07-2024, 12:55 AM

Lots of Good Input. Don’t see the Coil issue but the Injector issue is interesting. Would like to hear more from anyone who might of had this problem

**kwmech** · 09-07-2024, 07:46 AM

coil over engine? bad coil or loose spark plug. Ls engine, exhaust leak..broken bolt/s

**samkost** · 09-07-2024, 10:35 AM

Quote:

Originally Posted by kwmech

coil over engine? bad coil or loose spark plug. Ls engine, exhaust leak..broken bolt/s

Maybe related, maybe not.
My 350 V8 had an odd ticking noise thinking the lifters needed adjustment.
An exhaust leak from on the passenger side rams horn was the culprit.
Turns out the restoration shop from hell struck again.

Went to tighten things up when the very first forward bolt was loose and broken
It was glued back in with blue RTV glue thinking no one would notice.
The crack (on crack) mechanics struck again.

Just one of many gremlins I have been chasing the last few years.

Eddie70 · 09-07-2024, 12:09 PM

Quote:

Originally Posted by kwmech

coil over engine? bad coil or loose spark plug. Ls engine, exhaust leak..broken bolt/s

My 2014 Silverado had a ticking noise I found to be a loose spark plug wire. The plug wire was just barely hanging on to the coil. I pushed it back on, years ago and many miles, no issues since related to that.

weq92f · 09-07-2024, 02:35 PM

.

My former daily driver had an inline six. The engine cover incorporated a very thick sound insulation pad that sat directly above the injectors and coils. Without the cover, it sounded like all the lifters might have been ticking.

-Kevin

09-06-2024, 12:05 PM	#1
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,172	Sounds like a Lifter but it’s not Listened to a conversation at last nights Car Show about Injectors and Coils making noise that sounds like a Lifter. Anyone ever heard of Or experienced this __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 Last edited by 1970 CST Short Wide; 09-06-2024 at 05:53 PM.

09-06-2024, 12:06 PM	#2
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,367	Re: Sounds like a Lifter but it’s not I have heard an injector tick before and it does sound similar to a lifter, but more faint. Never heard a coil pack make that noise though. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

09-06-2024, 02:25 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,610	Re: Sounds like a Lifter but it’s not Maybe a coil pack if it was leaking to ground? __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

09-06-2024, 02:42 PM	#4
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,300	Re: Sounds like a Lifter but it’s not What engine transmission combination are we talking about? __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

09-06-2024, 04:39 PM	#5
Joyridin Registered User Join Date: Sep 2020 Location: Cleveland, Ohio Posts: 545	Re: Sounds like a Lifter but it’s not My LS injectors made sounds you swear were from a collapsed lifter. They were aftermarket performance injectors though. I have never heard of a factory injector making that much noise.

09-06-2024, 06:27 PM	#7
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,453	Re: Sounds like a Lifter but it’s not LS engines as a whole are notorious for the “type writer” valve train sound. It’s just what they do. I’ve heard loud injectors before but not coils. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

09-07-2024, 12:55 AM	#9
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,172	Re: Sounds like a Lifter but it’s not Lots of Good Input. Don’t see the Coil issue but the Injector issue is interesting. Would like to hear more from anyone who might of had this problem __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

09-07-2024, 07:46 AM	#10
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,602	Re: Sounds like a Lifter but it’s not coil over engine? bad coil or loose spark plug. Ls engine, exhaust leak..broken bolt/s

09-07-2024, 02:35 PM	#13
weq92f Registered User Join Date: Oct 2016 Location: Dallas Texas Posts: 3,161	Re: Sounds like a Lifter but it’s not . My former daily driver had an inline six. The engine cover incorporated a very thick sound insulation pad that sat directly above the injectors and coils. Without the cover, it sounded like all the lifters might have been ticking. -Kevin __________________ 67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold



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