Master
SupporterHey folks,
Bit of a weird breakage I haven't seen before - I'm just after some advice. I've seen a lot of things break on a 300tdi but a lot of you guys are a lot older and wiser than me!
I had one of the bolts that hold the roller lifter guides (number 2 valve) drop out! The guide then was allowed to rotate and the roller (now perpendicular to the camshaft lobe) jammed the camshaft rotation. The timing belt tried to turn the camshaft pulley and couldn't, so it sheared the locating dowel on the end of the camshaft off and then snapped the bolt off the camshaft pulley centre too.
I stripped the top end off this arvo - and ill try and add some pics below. The usual slightly bent pushrod or two and a broken rocker arm and a slightly chewed up roller guide.
Obviously I have spare pushrods, rocker arms, camshaft pulleys, roller lifters etc - but the roller has marked the lobe on the camshaft... you can just feel a small shallow depression with your finger nail. I was actually surprised - I was expecting the whole lobe to be chewed up - but it looks like the roller just slipped down the lobe - bang - and fell down in the sump probably... The tiny mark is not on the high point of the lobe but on a side (maybe visible in the pic).
The engine is about 4 years old since I totally rebuilt it. Driven all across oz many times in it since. Was running sweet. All other roller guide bolts seem tight.
Anyway, she is my daily driver as well, so I need her back asap.
My queries to you guys are:
Do you think the tiny depression on the side of the lobe will interfere with the roller lifter - if I just drop a new lifter assembly in?
Can I put in spare good camshaft without changing the cam bearings? I really don't want to have to do the cam bearings as that is engine out and fully strip block down cos the machinist will get metal rubbish inside. Then it will be a hone and new rings - on an engine that was running with lots of power.
Obviously if I keep the same camshaft with the mark on the lobe I have to put in a new locating dowel for the pulley - I'm presuming its just a pressed interference fit?
Thanks so much for any guidance!
IMG_20251119_170227~2.jpg IMG_20251119_170400~2.jpg IMG_20251119_175107~2.jpg IMG_20251119_175254.jpg IMG_20251119_175416.jpg IMG_20251119_175300.jpg
97 Disco 300Tdi, front & rear diff locked, hybrid turbo, full width intercooler, cranked front & rear arms,
2” dobinson coils, terrafirma shocks, HD steering arms, diff guards, rocksliders, domin8r winch, tank guard
LordRover
SubscriberThis is just me, but I'd put it back together and use it. 300Tdis are pretty tough, and what's the worst that can happen? The lobe might get worse. As for the cam bearing question, I'll leave that for others as I have never done a cam in one. I imagine that RAVE would want you to replace them, but as far as I can see it doesn't give a clearance, just the end float, so maybe not.
JayTee
Nullus Anxietus
Cancer is gender blind.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
RoverLord
swap the cam, run the old bearings.
Dave
"In a Landrover the other vehicle is your crumple zone."
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Master
SupporterThanks guys! Both responses are helpful
97 Disco 300Tdi, front & rear diff locked, hybrid turbo, full width intercooler, cranked front & rear arms,
2” dobinson coils, terrafirma shocks, HD steering arms, diff guards, rocksliders, domin8r winch, tank guard
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