Brian said:
Thanks, that's the kind of info I was looking for.
OK, I'll give you 2 examples:
here's one for the Sirius-II engine:
===========================================================
2002 Hyundai Santa Fe GL
Engine: 2.4 L / 4 cyl / Gas / DOHC
Fuel: Fuel Injection
Ignition: Distributorless
Trans: 5-speed Standard Transaxle
Mileage: 74,083 mi
VIN: KM8SB12B62
More Info: Test results & repair history included below
_____________________ CLOSED W/SUMMARY _____________________
This one is headed back to the dealer.
One response suggested loosening motor mounts lifting engine
slightlyand retightening.
Also checking IAC and throttle bdy forcarbon buildup.
Overwhelming responses said dealer did not time balance shafts
correctly when they replaced timing belt.
There is an updated cover available to help keeptiming belt from
jumping.
The procedure for timing balancer belt is available at
www.hmaservice.com
Thanks for your imput.
_____________________ ORIGINAL MESSAGE _____________________
Thanks in advance for taking the time to read this request.
This vehicle has excessive engine vibration. Car doesn't
have to be moving or be in gear. Initial start up it seems
ok. Once engine settles down to idle speed, vibration felt
throughout car.This is not a miss.Ran engine without drive
belts-no change.Replaced balancer with new oem. Seems
slightly worse with ac on. Evacuated ac and recharged with
correct amount of freon. Pressures appear normal withe the
exception of high side going to 250 before electric fan
kicks on.This feels like a mismatch between crank and
flywheel, an out of balance condition.Has anyone seen this?
The dealer couldn't figure out what was going on.
Xxxx Xxxxxx
Technician
X xxx X Xxxx Xxxx
Portland, Oregon, USA
___________________ TEST AND REPAIR DATA ___________________
TESTING AND RESULTS
compression check - good
motor mounts - good
RELATED REPAIR HISTORY
New harmonic balancer. Broken timing belt replaced at
62,000 miles, bent valves replaced at that time by dealer
__________________________________________________________________
From: Xxxx from Wisconsin
Date: 10/19/2004 19:38:52
The balance shafts are likely mistimed. This should have
been obvious to 'the dealer', but I guess you never know.
From: Xxx from Australia
Date: 10/20/2004 00:17:53
Hi Xxxxx, this sounds to me that when the timing belt broke maybe the
balance shaft belt was not timed right when it was replaced. The
balance shaft belt fits in behind the main belt.
From: Xxxxxxx from California (Northern)
Date: 10/20/2004 00:22:05
Hi Xxxx-
Look for a jumped timing belt, or the front balancer shaft is not in
time.
There is a new upper cover for the timing belt. Look for a small
"lump" inside the upper timing belt cover; it's there to help keep the
belt from skipping teeth. The rear balancer is driven by a small belt,
similar to a 2.2L Honda. The rear shaft is easily timed, nothing more
than lining up the two marks. The front shaft needs to be correctly
set.
With the mark lined up, turn the shaft slightly. If it turns back to
the mark from either direction, the shaft is correct. If it turns away
from the marks, the balance needs to be turned one revolution, then
reinstall the boot. Look at
www.hmaservice.com for the TSB that
describes this procedure.
From: Xxxxxxxx from Texas
Date: 10/20/2004 09:52:00
if the motor mounts are good i would loosen them and raise
the engien slightly up and tighten them up again to see if
that helps. also check the throttle body for being dirty
and iac operation and to make sure it dosnt have any carbon
build up.
==================================================================
One case for the Sirius engine:
1994 Hyundai Elantra
Engine: 1.8 L / 4 cyl / Gas / DOHC
Fuel: Fuel Injection
Ignition: Distributorless
Trans: 5-speed Standard Transaxle
Mileage: 91,138 mi
VIN: KMHJF32M9R
Misc Data: 4dr GLS
Affected Item: engine
Condition: vibration
More Info: Repair history included below
_______________________ CLOSED W/FIX _______________________
I would like to thank all who responded. The rear balance
shaft was indeed 180 degrees out.
Seems the tech spun the oil pump/balance shaft pulley around with the
timing belt off for some reason.
Set the rear balance shaft by removing plug and installing screwdriver.
Ran car without timing cover due to it being broken on the last removal
and vibration is gone.
Sorry for the delay in closing.
Seems the young owner of this car did not have money for the
repairs so I now own it and had other pressing projects.
_____________________ ORIGINAL MESSAGE _____________________
This car came with what appeared to be an exhaust
leak.Found the head gasket had burnt through the fire ring
on #1 cylinder and was leaking externally. Replaced head
gasket had cyl. head gone through.After completing repairs
took car out for a test drive and it ran great until it was
wound up a bit. A vibration starts at about 3100rpm and
gets worse with an increase in rpm.The timing belt was set
according to a timing belt manual (Autodata I
believe).Pulled every thing back down and double checked
the timing marks all was as set before right on the
marks.
Customer informs me the car had been at the dealers a
month ago and had the oil pump either resealed or replaced
and the oil pan gasket replaced.
Is it possible to not get the pully back on the rear balance shaft
correctly or is there another way to verify the position of balance
shafts.
I am leaning towards a balance shaft issue as the car did
not vibrate before the repairs.
Xxxx Xxxxxx
Owner/Technician
Xxx Xxxx Xxxxxx
Kimball, Nebraska, USA
___________________ TEST AND REPAIR DATA ___________________
RELATED REPAIR HISTORY
Replaced head gasket due to external combustion leak.
Timing belt, waterpump,idler and tensioner replaced.Valves
ground,seats cut and cyl. head planed.
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