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Jacking up the engine safely


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LFY
Novice

Jun 18, 2021, 9:10 AM

Post #1 of 14 (421 views)
  post locked   post icon Jacking up the engine safely  

Hello everyone,I'm planning to change my timing belt (Peugeot 306 1.8 16V). To improve access to the timing area (right hand of the engine), I need to remove right upper motor mount and its bracket. To do this, I need to jack up the engine.I place a piece of wood under oil pan and jack up the engine.What I need to know is the limit for this vertical movement of the engine. How high can you jack up an engine safely without damaging it?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2021, 9:53 AM

Post #2 of 14 (409 views)
  post locked   Re: Jacking up the engine safely  

The key is using wood as you intend and spreading the surface as large as you can. Be sure your block reaches the edges so the flat area isn't supporting all the weight.

Just watch when lifting it that no delicate components get pressed against anything that can break them. Stop jacking when the body lifts beyond an inch. The first inch is just the engine weight coming off the springs.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Jun 18, 2021, 9:54 AM)


Tom Greenleaf
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Jun 18, 2021, 9:58 AM

Post #3 of 14 (404 views)
  post locked   Re: Jacking up the engine safely  

This site US based so the car isn't sold here limited on any exact instructions.
The wood idea stand - you choose type of wood that won't harm anything.
If you have to move engines to work on them find out if you should lower it down and car body up or can do thru a wheel well or if up look for everything connected that is has enough free play to do it or remove those items. Wiring, linkages, fuel line(s) and what it might hit?
Some of your parts places may have or sell you the manufacturer's directions, diagrams, torque specs and all to do this job. ASK,


T



LFY
Novice

Jun 18, 2021, 11:50 AM

Post #4 of 14 (394 views)
  post locked   Re: Jacking up the engine safely  

Thanks for your answers but my question was not about using the wood or how to jack up the car. Maybe I couldn't make myself understood properly.I just want to know how many centimeters (or inches) can you jack up an engine on average from its original position on the engine mount?
For example, if you jack it 5 inches higher than its original position, it resists going any higher than that. This is what I want to know.


(This post was edited by LFY on Jun 18, 2021, 11:54 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2021, 11:55 AM

Post #5 of 14 (383 views)
  post locked   Re: Jacking up the engine safely  

There is no answer to that question. You have to observe and use common sense.

It will vary on which mount is disconnected and the position of the remaining mounts. It matters how much clearance the engine has also.

It is a learned technique that varies from one car to another.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



LFY
Novice

Jun 18, 2021, 12:00 PM

Post #6 of 14 (379 views)
  post locked   Re: Jacking up the engine safely  

I want to disconnect the upper motor mount and jack up the engine because I can't remove timing belt cover (upper mount blocks my access). My own common sense is to jack up the engine and stop jacking as soon as I felt the engine resists moving. Do you confirm this approach?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2021, 12:04 PM

Post #7 of 14 (375 views)
  post locked   Re: Jacking up the engine safely  

Yes, that's fine.
Are you sure you are up for this job? You seem to be struggling over the easiest part of this procedure.

Changing a timing belt can be tricky and making a mistake can cost an engine.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



LFY
Novice

Jun 18, 2021, 12:16 PM

Post #8 of 14 (371 views)
  post locked   Re: Jacking up the engine safely  

I knew you would say this but I'm not struggling, this is just a normal step of replacing timing belt in my car and even the most professional mechanics remove the upper mount bracket because there is no other way to gain access to the timing area.
I'm a little over-sensitive about details which is why I always ask questions even about the seemingly most insignificant parts of the job.

Picture deleted............... too large


(This post was edited by Hammer Time on Jun 18, 2021, 12:36 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2021, 12:20 PM

Post #9 of 14 (362 views)
  post locked   Re: Jacking up the engine safely  

I don't debate that the mount has to be removed but you're having trouble jacking up the engine. Timing an engine is far more difficult with a lot more at stake.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



LFY
Novice

Jun 18, 2021, 12:24 PM

Post #10 of 14 (358 views)
  post locked   Re: Jacking up the engine safely  

I have jacked up the engine before a couple of times without any problem and this is not my first attempt. However, this time I wanted to know if my method is right or wrong.
Sometimes you think you have done it correctly but when you consult with others, they will refer to some important points that may not be familiar for you. That movement limit of engine was something I wanted to be 100% sure of.


(This post was edited by LFY on Jun 18, 2021, 12:25 PM)


LFY
Novice

Jun 18, 2021, 12:27 PM

Post #11 of 14 (354 views)
  post locked   Re: Jacking up the engine safely  

This is a picture of my engine:https://i.imgur.com/puDtAnN.jpeg
Yellow arrow = timing belt cover (which is surrounded by A/C lines and mount bracket) Red = Upper mount bracket Blue = upper engine mount


(This post was edited by LFY on Jun 18, 2021, 12:36 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2021, 12:39 PM

Post #12 of 14 (332 views)
  post locked   Re: Jacking up the engine safely  

OK, I'm not getting through to you so I'm closing this now. You have jacking instructions but I'm betting that won't be where things go wrong in this job. You're playing with fire when you start messing with a timing belt on an interference engine.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



LFY
Novice

Jun 18, 2021, 12:46 PM

Post #13 of 14 (330 views)
  post locked   Re: Jacking up the engine safely  

I have worked on replacing timing belt of the same engine but on a different car (body). That car didn't need the mount to be removed but my car has a more confined engine bay. I have serviced and maintained my car for 10 years without causing any major damage.


(This post was edited by LFY on Jun 18, 2021, 12:47 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 18, 2021, 12:49 PM

Post #14 of 14 (322 views)
  post locked   Re: Jacking up the engine safely  

OK, good luck.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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