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Unread 07-22-2012, 08:45 PM   #31
bmlarson12
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1997 ZJ 
 
Join Date: Apr 2012
Location: fort collins, co
Posts: 29
Should the engine computer learn this new camshaft over time? It really doesn't feel like there is more power at this point. I know I have noticed an improvement over the first few minutes of driving, but I am not sure how much the engine computer will adjust. Is there a slightly less expensive way to tune it than buying a tuner?

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Unread 07-24-2012, 02:00 PM   #32
bmlarson12
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I messed with a few sensors in the throttle body and it is a little better.
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Unread 07-25-2012, 12:01 AM   #33
bmlarson12
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There are a few things that I hadn't mentioned about the rebuild.
1. The pistons were reused because when they were measured with a micrometer, there was no wear at all.
2. Crankshaft had no wear at all.
3. The heads were not cracked, but the valves were not seating very well, so that was fixed.
4. There was no plenum leak, so the plenum cover was reused with a new gasket.
5. There was a misunderstanding about getting the lifters, so the old ones were reused. (we were running out of time to finish and didn't want to spend $480 on new lifters from a dealer)

The crosshatch pattern in the cylinders could easily be seen still, so it was just deglazed for new piston rings. I still want to find some way of modifying the engine computer that is not so expensive, but it is running well for now.
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Unread 08-04-2012, 04:37 PM   #34
titus95
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Up to this point could you say what the total cost of the rebuild has been? Looking to do mine in the future, appreciate the info.
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Unread 08-04-2012, 04:47 PM   #35
Kevinyj95
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Why didnt you just buy a complete master rebuild kit? 529$ free shipping. comes with everything cam lifters pistons everything. heres a list...
FULL GASKET SET
Notes: W/ Valve Stem Seals & Rear Main Seal

(8)FLAT-TOP PISTONS
Sizes Available: STD, .020, 030, .040, .060

Notes: Flat Top Pistons w/ 1.741" CH.

PREMIUM PISTON RINGS
Sizes Available: STD, .020, 030, .040, .060

Notes: 5/64", 5/64", 3/16"

MAIN BEARINGS
Sizes Available: STD, .010, .020, .030

ROD BEARINGS
Sizes Available: STD, .010, .020, .030

CAMSHAFT BEARINGS
3-PC TIMING SET
OIL PUMP
FREEZE PLUGS
ROLLER CAMSHAFT
(16)ROLLER LIFTERS


Im sure theres more that was just the first one I found.
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Unread 08-04-2012, 04:52 PM   #36
Kevinyj95
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Its pretty cheap to rebuild a motor. Most people think its too complicated but its really not that bad. Now transmissions.......
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Unread 08-04-2012, 05:04 PM   #37
edpmedic
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I agree about the kit that's usually the way j go. In my years of doing engines if I am using a new cam I do lifters. Old lifters can fail and wear a new camshaft. They were worn in on the old cam and cause the bottoms to wear in a different pattern and wear faster. They can also cause premature cam lobe wear.Depending on how aggressive you are with the lift and duration. I see no problem using the old pistons if they were in specs and not causing your knock problem.
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Unread 08-04-2012, 05:20 PM   #38
edpmedic
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Quote:
Originally Posted by Kevinyj95 View Post
Its pretty cheap to rebuild a motor. Most people think its too complicated but its really not that bad. Now transmissions.......
To me transmissions are easier. Less measuring and machine work. You get a master rebuild kit and its is just seals, clutch packs, and thrust washers. Just remember where it all goes and you can rebuild most Trans in 45 min. Including air check and valve body.

I'm not trying to be wise but if you do it a couple of times you realize they are almost all the same. Actually I find Chrysler Trans the easiest out of all of them. When I worked for GM I would try to get Trans jobs. When I worked for Fiat 124 Spyders head gaskets and timing belts were my bread and butter.
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Never4get those who gave their lives on 09-11-01 WTC and Pentagon. FDNY-EMS-NYPD-PAPD. Also those who are still dying.
_______________________________________________
"Freedom is never voluntarily given by the oppressor; it must be demanded by the oppressed."
Martin Luther King, Jr.
_______________________________________________
"Always aim at complete harmony of thought and word and deed. Always aim at purifying your thoughts and everything will be well."
Mahatma Gandhi
_______________________________________________
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Unread 08-04-2012, 05:23 PM   #39
jtackerman28
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Quote:
Originally Posted by edpmedic
I agree about the kit that's usually the way j go. In my years of doing engines if I am using a new cam I do lifters. Old lifters can fail and wear a new camshaft. They were worn in on the old cam and cause the bottoms to wear in a different pattern and wear faster. They can also cause premature cam lobe wear.Depending on how aggressive you are with the lift and duration. I see no problem using the old pistons if they were in specs and not causing your knock problem.
Yeah new lifters and what did you do for springs?
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