Are the 2.6 an interference motor?

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Are the 2.6 an interference motor? #930961 02/13/09 05:53 AM

Joined: Sep 2008

Posts: 16

Seattle

gilamontero Offline

Need a Spot

Saw this add in Craigs and I wondered if the 2.6 would bend valves if the timing gears were installed incorrectly.

http://seattle.craigslist.org/sno/cto/1024030921.html

Hank

Re: Are the 2.6 an interference motor? [Re: gilamontero] #930962 02/13/09 02:05 PM

Joined: Apr 2002

Posts: 3,622

Brookfield, WI

NathanC

Roll Me Over

No.

'06 Dakota QC 4.7 6sp 4x4
'88 Mighty Max
'77 KZ1000 fun old bike

Re: Are the 2.6 an interference motor? [Re: NathanC] #930963 02/13/09 06:13 PM

Joined: May 2000

Posts: 6,132

Portland OR

Kevin C

Trail Leader

I think the carb motor is an interference motor, here is why.

I took a quick look at the head on my bench and the outer edge of the intake valve is about .18" from the deck of the head.

Assume the head gasket is .040 thick and the deck height of the piston is -.040 the valve to piston clearance is .260".

The valve lift is about .380" but it comes in at an angle so the actual distance into the chamber is less. A quick calculation puts it at .31".

Based on that the flat top piston 2.6 is an interference motor.

Kevin

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...

Re: Are the 2.6 an interference motor? [Re: Kevin C] #930964 02/13/09 06:29 PM

Joined: Jan 2001

Posts: 13,649

Helen , GA

fasteddy

Web Wheeler

The Gates web site says it's not, but if forced to choose, I'd go with Kevin until I get a chance to hand turn a motor and check it with the cam sprocket off...

Not responsible for advice not taken...

Re: Are the 2.6 an interference motor? [Re: fasteddy] #930965 02/14/09 02:40 PM

Joined: Apr 2008

Posts: 441

Petoskey, Michiagan

TainterRacing Offline

Mudrunner

I have a bent 2.6 head right now off my dad's motor yes it will mess the valves up. (Intake only)

1997 Montero LS with a motor swap a 1990 V6 12valve ported heads full 2.5in Ex I run stock tire size for Daily use, off road have 33x12.5 working on going trubo.

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