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Timing belt change. What seals to replace?

benl1981

By benl1981,
in General Maintenance

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benl1981 Grand Master

benl1981

Posted
Posted

What seals should you replace when you do a timing belt on anRB25DET. The mehanic I spoke to reckoned crank and camshaft I think.

I didn't think this was necessary as I wouldn't even be taking the camshaft pulleys off.

Even the crank seal I didn't think would be necessary.

Apparently the timing belt is hitting the cover so he thinks maybe the tensioner is dodgy.

Also he said that the crank pulley can sometimes be very hard to get offf!!!

yogi000 Mentor

yogi000

Posted
Posted

its recommended you do the following

Cam Shaft Seals

Crank Shaft Seals

Tension Pully

Idler Pully

Timing Belt

You dont want to change the timing belt then find out 6 months later that your crank seal is leaking and u gotta take it all off again.

The most expensive part will be the tension pully.

benl1981 Grand Master

benl1981

Posted
  • Author
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Dont people usually crank engine for split second with bar on chassis rail to loosen he nut. How about doing it up?/ Does a harmonic balancer puller usually get it off once nut is undone?

I have done a lot repairs on cars but never a timing belt - so just trying to gather info before I start.

Cheers

benl1981 Grand Master

benl1981

Posted
  • Author
Posted

Is it hard to get the correct tension on the belt?? Is it auto adjusting or do you have to set the tension pretty spot on.

Is the crank seal shown below here.

And to do the cam seals you have to take the pulley wheels off the camshafts?

Do you guys just mark with a white pen for reference to make sure all the pulleys are in the same relative position when you reassemble.

Thanks for thehelp so far

timing0hw.jpg

benl1981 Grand Master

benl1981

Posted
  • Author
Posted

If I replace the camshaft seals does this mean I have to take off the rocker cover so I can secure the cams to stop them from spinning when I want to tighten the pully wheel bolt.

ALso do you guys just reuse the spring on the tensioner pulley. Or when you get a new pulley and bearing doe this come with it?

Thanks

benl1981 Grand Master

benl1981

Posted
  • Author
Posted

P.s. how much tension should be on the belt. I have taken the top cover off mine and there is quite a bit of deflection if you push on the belt between the top 2 camshaft pulleys. I'm not going to drive it much until I replace it. I think the mechanic was rightI think it has been hitting the belt cover...

1) WHAT is the best way to stop the crank spinning? I read somewhere you can bust your gearbox if you way put it in 5th and apply brakes to undo the bolt. If you just put it in 5th without putting on the brakes the worst it can do is rotate the wheels right?

2) Getting the pulley off. Is a cheap harmonic balancer puller not good for this job?

3) Is it hard to remove the crank timing gear to get to the crank seal? I heard a few people on hear say it is a real bitch.

4) How hard is it to get the cam seals..i.e remove rocker cover?

I'm thinking maybe just do

the 2 bearings,

belt,

water pump (maybe)

There is no oil form crank or cam areas. ...

The shop said it could be quite expensive if they run into trouble

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