'88 that hesitates

Reply
 
LinkBack Thread Tools Display Modes
Old 16 Aug 2005, 10:16 pm   #1 (permalink)
George and Jurate
Guest
  • Posts: n/a
  • User Status:


Default '88 that hesitates

Car has 193K on it and recently had the timing belt and water pump replaced at a Toyota Service Shop. After getting the car from the shop, the service clerk told me I had a transmission problem and tried to sell me a power flush. The car had not had such a problem previously, so I went out and drove the car off. It hesitate as though it was choking then picked up and slowly moved off. The sensation was like the engine was working hard to get anywhere, but I did not hear a whine or get the feel of a slipping tranny. Once the engine picked up power, the tranny would change - the more speed the smoother the change. Going up hill it would tend to heat up and slow down - never over heated however. I had a friend who works at a transmission shop check it out and he told me it was a timing problem not a transmission problem. He did a little work on the timing [free] and the car runs much better, however, it still evidences a bit of hesitation. Because he is very busy and did the work free I haven't gone back to him yet. Any ideas??
  Reply With Quote
Old 17 Aug 2005, 11:59 am   #2 (permalink)
Jason James
Guest
  • Posts: n/a
  • User Status:


Default Re: '88 that hesitates


"George and Jurate" <jjandgj@optonline.net> wrote in message news:q_xMe.5420$Gx1.470@fe11.lga...
Car has 193K on it and recently had the timing belt and water pump replaced at a Toyota Service Shop. After getting the car from the shop, the service clerk told me I had a transmission problem and tried to sell me a power flush. The car had not had such a problem previously, so I went out and drove the car off. It hesitate as though it was choking then picked up and slowly moved off. The sensation was like the engine was working hard to get anywhere, but I did not hear a whine or get the feel of a slipping tranny. Once the engine picked up power, the tranny would change - the more speed the smoother the change. Going up hill it would tend to heat up and slow down - never over heated however. I had a friend who works at a transmission shop check it out and he told me it was a timing problem not a transmission problem. He did a little work on the timing [free] and the car runs much better, however, it still evidences a bit of hesitation. Because he is very busy and did the work free I haven't gone back to him yet. Any ideas??

The car, if the cam-belt was changed and re-timed properly, shouldn't be any different than before you took it in. Take it to a reputable mewchanic to have cam-timing checked or the belt install checked. On the 4 cyl, the cam-belt drives the water-pump, so they would have had it off.

Jason
  Reply With Quote
Old 17 Aug 2005, 06:19 pm   #3 (permalink)
Daniel
Guest
  • Posts: n/a
  • User Status:


Default Re: '88 that hesitates

Sounds like typical run around you sometimes get from mechanics who
botch the work .
There's cam timing controlled by the timing belt that was replaced, but
the cam - assuming 4 cylinder since you didn't say differently - also
drives the distributor which controls ignition timing.
The timing belt has teeth or notches so there will be no slippage. This
means is has to be installed properly.
Not uncommon to be "one tooth off" - sounds like your problem.
Since the drivability issues arose right after the work - that's a big
clue.
If the second mechanic adjusted the ignition timing, that could help
compensate, but doesn't correct the underlying problem.
Someone needs to take everything apart again and make certain the
timing marks - crankshaft pulley and camshaft gear are correctly
aligned and the belt properly tensioned.
Should be routine for someone familiar with this work, but can be quite
tricky for someone unfamiliar with this particular application.
After reading the Internet for a couple of years, I did this work
myself. There is a tiny notch on the upper portion of the front
camshaft bearing that can be seen through a small circular opening in
the camshaft sprocket when the timing belt is correctly positioned and
the crankshaft pulley mark is at top dead center.
The Haynes repair manual shows pictures.
Even with a light and a mirror, I had difficulty aligning these marks
precisely, and wound up using a round wooden tooth pick to judge the
correct position. Sounds odd, but worked fine.
There needs to be tension placed on the side of the belt facing front
when installing the belt.
Also, you need (strongly recommended) to replace the tensioner pulley
spring with a new one, but do not rely solely on that spring to tension
the timing belt.
You need to loosen the adjustment bolt and pry or pull with a lot of
force several times (I pulled upward with the full force of both arms
enough to move the whole engine several times - smoothly but firmly),
then release the tensioner pulley and tighten the adjustment bolt with
that spring retaining the tension.
To restate - the spring only holds some of the tension previously
applied. If you rely entirely on that spring, the belt will be too
loose and cause problems quickly.
Also recommended with this work to do a variety of other items to
prevent future problems - but find a trusted mechanic first.
Oil seals, water pump, valve cover gasket, distributor O ring, spark
plugs, spark plug wires, distributor cap and rotor and packing,
transmission and differential fluid change, power steering fluid and
brake fluid change, check chassis mounting bolt torque, seat mounting
bolt torque.

  Reply With Quote
Old 20 Aug 2005, 11:42 am   #4 (permalink)
jimhigh66
Guest
  • Posts: n/a
  • User Status:


Default Re: '88 that hesitates

I agree with Daniel. They installed the timing belt improperly -- probably
a notch or two off.
Note that once the belt is installed correctly (and hence the valve timing
is now correct) the igintion timing will have to be redone -- put back to
where it orignally was.

  Reply With Quote
Old 23 Aug 2005, 02:19 am   #5 (permalink)
George and Jurate
Guest
  • Posts: n/a
  • User Status:


Default Re: '88 that hesitates

Thanks to all for your great help. I always find good, sound advice here.

"Jason James" <associate@dodo.comzapspam.au> wrote in message
news:43036cc5@news.comindico.com.au...

"George and Jurate" <jjandgj@optonline.net> wrote in message
news:q_xMe.5420$Gx1.470@fe11.lga...
Car has 193K on it and recently had the timing belt and water pump replaced
at a Toyota Service Shop. After getting the car from the shop, the service
clerk told me I had a transmission problem and tried to sell me a power
flush. The car had not had such a problem previously, so I went out and
drove the car off. It hesitate as though it was choking then picked up and
slowly moved off. The sensation was like the engine was working hard to get
anywhere, but I did not hear a whine or get the feel of a slipping tranny.
Once the engine picked up power, the tranny would change - the more speed
the smoother the change. Going up hill it would tend to heat up and slow
down - never over heated however. I had a friend who works at a
transmission shop check it out and he told me it was a timing problem not a
transmission problem. He did a little work on the timing [free] and the car
runs much better, however, it still evidences a bit of hesitation. Because
he is very busy and did the work free I haven't gone back to him yet. Any
ideas??

The car, if the cam-belt was changed and re-timed properly, shouldn't be any
different than before you took it in. Take it to a reputable mewchanic to
have cam-timing checked or the belt install checked. On the 4 cyl, the
cam-belt drives the water-pump, so they would have had it off.

Jason


  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 01:18 am.

Attribution:
Autoblog
Powered by Yahoo Answers



ToyotaLexusForum.com is an unofficial community for car enthusiasts. ToyotaLexusForum.com is not affiliated with Toyota Motor Corporation in any way.
Toyota Motor Corporation does not sponsor, support, or endorse ToyotaLexusForum.com in any way.
Copyright/trademark/sales mark infringements are not intended or implied.