jcwcooper Posted November 24, 2010 Share Posted November 24, 2010 My Timing belt snapped on Monday night , Ive started stripping it down tonight and im just debating do I take the head off or not? Ive taken a look at the thread HEREand looked a few other places and it seems that its ok too just fit new pushrods and timing belt kit and see if it turns over by hand ok??? So the question is do I take the head off and check the valves or will it be ok? thanks Dave. Quote Link to comment Share on other sites More sharing options...
Phil B Posted November 24, 2010 Share Posted November 24, 2010 I had the belt snap on my Peugeot gti6 I had similar Optimisum untill I took the head off, 4 valves and a screwed piston it is worth taking it off it will only cost you A head gasket and a head skim if nothings wrong it will save you more damage if something is uncouth Quote Link to comment Share on other sites More sharing options...
fozsug Posted November 24, 2010 Share Posted November 24, 2010 Leave the head, check the rocker shaft and pillars, fit new push rods, and timing belt etc, fire her up and away you go Quote Link to comment Share on other sites More sharing options...
Jon White Posted November 24, 2010 Share Posted November 24, 2010 No need to lift the head, but check the rocker gear carefully and replace all the pushrods. Jon Quote Link to comment Share on other sites More sharing options...
Turbocharger Posted November 24, 2010 Share Posted November 24, 2010 Yup, roll the pushrods to make sure they're straight and check for bend/cracked/snapped rockers, and then time it all up as normal. Quote Link to comment Share on other sites More sharing options...
yella 90 Posted November 25, 2010 Share Posted November 25, 2010 I had the belt snap on my Peugeot gti6 I had similar Optimisum untill I took the head off, 4 valves and a screwed piston it is worth taking it off it will only cost you A head gasket and a head skim if nothings wrong it will save you more damage if something is uncouth Yes but, i assume that it was a over head cam engine which a 200tdi is not Quote Link to comment Share on other sites More sharing options...
tacr2man Posted November 25, 2010 Share Posted November 25, 2010 Nobody mentioned it , so I better, you need to check that the brass cam follower slides, that the push rods sit in are OK as well , as they quite often sacrifice when subjected to heavy load, i.e. when the valve tries to occupy the same space as the piston . Quote Link to comment Share on other sites More sharing options...
steve200TDi Posted November 25, 2010 Share Posted November 25, 2010 When I broke mine, I removed the head as your virtually there - If it fails a few months down the line you'll have to strip it down again. So I removed the head, cleaned, lapped the valves in (which turned out to be really good) and also rebuilt the injectors. Everything was fine, but it was a precaution to remove the head and I had the kit to do the valves and injectors so I thought I might as well! Steve Quote Link to comment Share on other sites More sharing options...
GBMUD Posted November 25, 2010 Share Posted November 25, 2010 I had the belt snap on my Peugeot gti6 I had similar Optimisum untill I took the head off, 4 valves and a screwed piston That was a petrol engine though, with the valves at an angle to the piston crown. In a 200Tdi the valve heads contact the piston flat meaning that the well supported and hard valve stem transmits the force straight up to the rocker without bending. In this case the softer pushrods bend like spaghetti. ...or so has always been my experience. Chris Quote Link to comment Share on other sites More sharing options...
plasticbadger Posted November 25, 2010 Share Posted November 25, 2010 I've snapped two 200 Tdi cam belts and have never removed the head. If your engine was in good condition and not in need of a head gasket then I really can't see the point. As has been explained above the 200Tdi is of a construction such that it will first bend push rods, then it will break the rockers and is very unlikely to ever bend a valve. The Peugeot engine is similar to Vauxhall and Ford engines of the same age that will bend valves as soon as the belt goes. I've had a Zetec where all 16 valves have been bent! Quote Link to comment Share on other sites More sharing options...
cjmt Posted November 25, 2010 Share Posted November 25, 2010 I've snapped two 200 Tdi cam belts and have never removed the head. If your engine was in good condition and not in need of a head gasket then I really can't see the point. As has been explained above the 200Tdi is of a construction such that it will first bend push rods, then it will break the rockers and is very unlikely to ever bend a valve. The Peugeot engine is similar to Vauxhall and Ford engines of the same age that will bend valves as soon as the belt goes. I've had a Zetec where all 16 valves have been bent! As a matter of interest how does all of the above apply to the 300 Tdi? Is the contsruction and damage from a snapped belt them same with the 300?? Charlie Quote Link to comment Share on other sites More sharing options...
plasticbadger Posted November 25, 2010 Share Posted November 25, 2010 As a matter of interest how does all of the above apply to the 300 Tdi? Is the contsruction and damage from a snapped belt them same with the 300?? Charlie The block and head layout is the same on the two engines, so I would imagine it to be the same, although I don't have the same practical experience. Quote Link to comment Share on other sites More sharing options...
keithjh Posted November 25, 2010 Share Posted November 25, 2010 As a matter of interest how does all of the above apply to the 300 Tdi? Is the contsruction and damage from a snapped belt them same with the 300?? Charlie Had this last year on a friends 110, i left the head on just changed all the push rods and checked the rocker shaft. No problems since Keith Quote Link to comment Share on other sites More sharing options...
Phil Hancock Posted November 25, 2010 Share Posted November 25, 2010 You will soon find out if there is a bent valve problem as it will blow. Quote Link to comment Share on other sites More sharing options...
GBMUD Posted November 25, 2010 Share Posted November 25, 2010 As a matter of interest how does all of the above apply to the 300 Tdi? Is the contsruction and damage from a snapped belt them same with the 300?? Charlie I gather that 300Tdi have a notch in the top of the rocker so that they break. They also turn the pushrods 'S' shaped. Chris Quote Link to comment Share on other sites More sharing options...
cjmt Posted November 25, 2010 Share Posted November 25, 2010 I gather that 300Tdi have a notch in the top of the rocker so that they break. They also turn the pushrods 'S' shaped. Chris Thanks all, good info. Charlie Quote Link to comment Share on other sites More sharing options...
cjf Posted June 13, 2023 Share Posted June 13, 2023 So when I removed my front cover, everything looked good except for the snapped timing belt. My question is for a 200tdi, do belts just snap from age or might there be an underlying issue? Quote Link to comment Share on other sites More sharing options...
western Posted June 13, 2023 Share Posted June 13, 2023 Check the tensioner is free to rotate, also examine the pushrod as they bend when pistons & valves meet, a new belt & tensioner & new straight pushrod should have it running again Quote Link to comment Share on other sites More sharing options...
hurbie Posted June 13, 2023 Share Posted June 13, 2023 49 minutes ago, cjf said: So when I removed my front cover, everything looked good except for the snapped timing belt. My question is for a 200tdi, do belts just snap from age or might there be an underlying issue? could wel be age related , bend the remaning belt with the tooth towards you and look for hairline cracks , if you see these you found the culprit ... other option (as mentioned above ) faulty tensioner. Quote Link to comment Share on other sites More sharing options...
miketomcat Posted June 14, 2023 Share Posted June 14, 2023 I had a series of cambelts go on one of mine, turned out to be a worn crank pulley letting muddy water into the timing chest. Mike 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.