Beginning rebuild on Escalade LQ9 motor

[02EscaNate]

Decided to o ahead and rebuild my engine. Right now I’m trying to decide if I want to hop it up while it’s going to be torn apart. Haven’t decided on L92 heads, as replacement LQ9 heads are dirt cheap and would let me keep my intake.

As far as the cam goes, is there a good cam that would up the power but still idle smooth and keep it easy to daily? I was thinking maybe an LS6 or LS7 cam.


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[Tonyrodz]

Sub'd for the build.

 

[iamdub]

For the cam: Low-.220s intake and high .220s exhaust, no tighter than 113 LSA, no more than around .590 lift, around 111 ICL maxing around 2 degrees advanced

Top it with a set of cleaned and/or rebuilt 243s and you'd have an iron block LS2 with snappy low-end torque and strong pull throughout the rev range. You'd have to have a good tune and run premium (which is required anyway on the LQ9, I believe)

A converter just a little more loose than stock would compliment it but not hurt the streetability.

 

[95escahoe]

Following


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[02EscaNate]

I think we got ourselves a build thread...


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[02EscaNate]

Started on the top of the motor and found the culprit. Looks like a spring busted, but from what I can see the valve is still there and the clip is in place. Turned the motor over by hand and it still moves with the lifter. Any chance I won the lottery and don’t have a bent valve?




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[swathdiver]

The aforementioned camshafts will kill your bottom end torque; they were made for cars.

Your stock camshaft (12561721) is 196-207 .467-.479 116

Cam Motion has a replacement truck cam that does not require higher lift springs: 204-212 .501-.501 116 or one that does with a .553 lift on both sides. The LS6's numbers aren't much different than these but the shape of the lobe sure is.

Hopefully the piston ain't broke neither! All my previous rides had dual valve springs and never had a valve kiss a piston.

 

[08grey]

I'm tuned in.

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[Nashoba]

Yep, me, too.

 

[02EscaNate]

Well, hands were too nasty to take a pic on my phone, but I was able to wrestle the intake manifold out. This engine leaked from the valve cover gaskets a long time ago, and it shows. Black nasty oil on everything on top of the engine.

Also was able to loosen the exhaust bolts with WD-40 “blue flame” and muscle. So far so good. Plan on tackling those next and getting one step closer to getting this engine on a stand.


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