Jump to content



Photo
- - - - -

5.7 '97 Tahoe - Interferance Design engine?


This topic has been archived. This means that you cannot reply to this topic.
7 replies to this topic

#1 themadhatter

themadhatter

    Enthusiast

  • Newbie
  • 1 posts

Posted 13 June 2003 - 03:24 AM

Hi guys, first post here.

I have a '97 Tahoe (2dr) with the 350 motor, I have two questions:


Is the 350 an interferance design motor?


Also, does this motor use a timing chain or a timing belt. If it's a belt, how often should I go about changing it?

Thanks!
Ron

#2 bassdog

bassdog

    Senior Enthusiast

  • Newbie
  • 1,045 posts
  • Location:Holden,MA

Posted 13 June 2003 - 04:32 AM

Welcome :thumbs:

I believe it is a timing chain, don't think the belt would be strong enough.

Not sure about the first question, someone should jump in soon :D
Former Silverado owner

#3 americanmuscleman

americanmuscleman

    Enthusiast

  • Newbie
  • 256 posts
  • Location:Tulsa, OK

Posted 13 June 2003 - 08:56 AM

I'm not sure what you mean by an interferance designed motor?

The Vortec 350 uses a timing chain (as does every small and big block engine). Its not something they will likely have to replace unless you have a ton of miles (200k+). If you have the engine apart though, its best to change it. Timing chains stretch after a lot of miles and can throw off the timing sequence of the camshaft and crankshaft.

The only belt you have on there is the serpentine belt. You should replace it if you start to see cracks in the rubber. Incase you've never changed one, there is a belt tensioner you pull back with a breaker bar or large ratchet that will allow you to pull the belt off and put a new one back on.

:D
Steve
2004 GMC 2500HD SLT, CC, SB, 4x4, LLY D/A, Carbon Metallic ext. / Dk Pewter int.

#4 Tennessee Jed

Tennessee Jed

    Enthusiast

  • Member
  • 421 posts
  • Location:Lakeland, TN
  • Gender:Male

Posted 13 June 2003 - 10:12 PM

Hatter, your 5.7 is a non interferance engine. :D
1985 GMC 3/4 ton 8600 GVW long bed with a 5.7L carbureted Vortec.
1994 S10 Blazer 4D 2wd. 130,000 mi. Still drives like new.
2007 Impala 3LT, 3.9L V6.

My mind is like a bolt of lightning; One flash of brilliance, then it's gone.

#5 kawboy579

kawboy579

    Enthusiast

  • Newbie
  • 13 posts

Posted 21 July 2003 - 10:58 PM

okay, ill bite: what is an interference engine?

#6 SteveCZ

SteveCZ

    Enthusiast

  • Member
  • 185 posts

Posted 22 July 2003 - 07:02 AM

Going out on a limb here, but I beleive an interference engine has something to do with the timing of the valves and the piston.

In an interference engine, when the valves open, and the timing is off, there is a chance that the piston can come in contact with the valves. In a non interference engine, this won't happen (as much?) dunno....

Like I said, this is what I thought it meant, but I could be wayyyyyyyy off

anybody else????

:thumbs: :thumbs: :D
1999 Chevy Silverado
- Black
- Extended Cab, Sportside box
- Tiara Motorcoach Conversion Package
- Custom Leather Seats, Embroidered Headrests, Wood Trim Kit, Wood overhead console w/ "Mood Lights"
- Chrome Westin Step Bars
- Chromed Stock rims
- Michelin LTX A/T 265/75/16s
- K&N Drop-in Filter
- Complete Diamond Audio Car Audio System:
2 150x2 amps, 1 10" Mac Daddy, 2 6.5's (doors), 2 5.25's (kickpanels), 2 Tweets(doors), Eclipse CD Player Head Unit, Crossfire 20 band equalizer

#7 Charlie in TX

Charlie in TX

    Enthusiast

  • Newbie
  • 150 posts
  • Location:Cypress, TX

Posted 22 July 2003 - 10:59 AM

DING DING DING, we have a winner. A interference design is one where the piston will hit a valve if the valve is fully open while the piston is TDC.

Usually interference motors are the smaller, hi-strung engines in the imports and cars. They are also usually OHC engines (but a OHV engine can be interference and a OHC can be a clearance).

The order it happens in is;
1. A broke timing belt will cause at least one valve to be held open.
2. The piston comes up and hits the valve.
3. The mechanic puts on a new head. $

#8 SteveCZ

SteveCZ

    Enthusiast

  • Member
  • 185 posts

Posted 22 July 2003 - 11:47 AM

:D

:thumbs:


:thumbs:
1999 Chevy Silverado
- Black
- Extended Cab, Sportside box
- Tiara Motorcoach Conversion Package
- Custom Leather Seats, Embroidered Headrests, Wood Trim Kit, Wood overhead console w/ "Mood Lights"
- Chrome Westin Step Bars
- Chromed Stock rims
- Michelin LTX A/T 265/75/16s
- K&N Drop-in Filter
- Complete Diamond Audio Car Audio System:
2 150x2 amps, 1 10" Mac Daddy, 2 6.5's (doors), 2 5.25's (kickpanels), 2 Tweets(doors), Eclipse CD Player Head Unit, Crossfire 20 band equalizer




Advertise Here