GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 6 of 6

Threaded View

  1. #1

    Default Seized 7.4L engine story and Question

    1995 GMC Sierra, Bucket Truck, 55,656 miles

    Story: 35 MPH #1 piston came apart and the connecting rod (which was still going up & down) beat the big pieces into little pieces; this smashing process bent the connecting rod until it punched a hole in the cylinder wall at which point the wrist pin lodged in the hole and stopped all movement.

    Purchased a Re manufactured engine (Mexico) with a flat tappet camshaft that needs to be broken-in properly, which leads to my question:
    When this engine starts for the very first time, would a new oxygen sensor be damaged by the burning of oil in the cylinders; I'm thinking of leaving the old sensor in until after camshaft break-in ? ? ?

    My History, I was born in 1946 and stopped working for an employer in 2010. I served aboard the USS INTREPID CVA11 in the 1960s. The Intrepid is now a museum in NYC. As a former crew-member I did volunteer duty on board 2009 & 2010.
    Last Year I volunteered at a water powered mill in Wilmington, DE.

    In 1993 I replaced a (4.3L) 267 SB with a (5.7L) 350 SB in a 1979 Chevrolet Malibu wagon (everyone called it a sleeper). That was the extent of my engine swapping until now.
    My SON just bought an electrical business from his employer who was getting out of the trade; the bucket truck was part of the deal. Less than a year later the engine seized and he wasn't getting the work he was hoping for (no money for the bucket truck). Enter volunteer DAD with the money for the engine and the tools to do the work.
    Thanks for any advice !Click image for larger version. 

Name:	DSCN1573.jpg 
Views:	123 
Size:	80.3 KB 
ID:	51810Click image for larger version. 

Name:	DSCN1574.jpg 
Views:	83 
Size:	82.8 KB 
ID:	51811Click image for larger version. 

Name:	DSCN1666.jpg 
Views:	87 
Size:	79.4 KB 
ID:	51812
    Last edited by 7.4L.....volunteer; 05-05-2013 at 10:16 AM.

Similar Threads

  1. SUV seized in RBC firebombing -
    By ChevyFan in forum Chevy Traverse Forum (GMC Acadia, Buick Enclave)
    Replies: 0
    Last: 05-28-2010, 12:40 AM
  2. 4x4 shifter seized
    By jimmy979 in forum GM Powertrain
    Replies: 1
    Last: 05-23-2010, 01:35 PM
  3. She's seized :(
    By crane557 in forum GM Powertrain
    Replies: 18
    Last: 04-05-2010, 08:50 AM
  4. I think my motor seized this morning!?!
    By stavropulos in forum GM Powertrain
    Replies: 8
    Last: 04-04-2010, 06:51 PM
  5. Engine Seized Up-1990 Suburban
    By CMCM in forum General Chevy & GM Tech Questions
    Replies: 0
    Last: 09-29-2008, 12:03 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts