WOKA Posted 12June Report Share Posted 12June So I took a drive yesterday to check out an advertised 996.1.. But first cast your minds back to when we were kids and we'd peg a playing card or something stiff to our pushys, which would rub along the spokes creating a noise that seemed to make us thing we were racers.! Remember.? So I get there, the car is very dewey being cold and early, have a look around it and really not too impressive, but its got something.. Start it up, a bit of chatter reminiscent with a cold start (notice the oil level indicator is on 2) but has good oil pressure otherwise. Lets go for a drive.. Drives nice even though its a tipper, could live with this for a while. Drive 5 minutes, pull over and grab a coffee and have a chat. I'm having a bit of a poke around and it is what it is. Its a cheap 996 Tipper, cosmetics, plastics and a bit of a oil weep around the LHS cam tower. Start it, nothing seems a miss lets go for another drive. Playing with the revs in manual mode and going through the gears but nothing too hard and fast, but I did notice an oil pressure drop... Then.. Then when I take my foot off the accelerator and just coast along I start to hear this noise, windows down, coming from what seems to be rear left hand side. Its hard to explain but its a definite fast and consistent ticking sound, like a card running over the spokes of a pushy wheel. As soon as I apply the slightest amount of pedal it goes, back off and its there. And then it starts to become more pronounced and a bit louder. The car still pulls fine and drives well so I figure that under acceleration with no noise its not about to totally let go. Five minutes later and I genuinely just coaxing along, listening, feeling and I smell oil. I look in my rear mirror and there is a huge cloud of grey smoke which I assume came from the truck that just went the other way, but no, its from the Pcar. I pull into the next turn (200m up the road) and the smoke is there but not plumes. Time to go back (luckily the owner is shotgun) and the car still drives fine by which time I'm forgetting to listen for the bike noise, as I'm more interested in whats coming out the exhaust. Sometimes nothing, but with a bit of gas, smoke, grey, oil smelling smoke. Get back to the owners place to discuss. Engine seems to start up fine, idles ok, no knocking noise other than bellows of white smoke on revs, not putting the boot in revs, just respectable blips. Less white smoke on idle, plumes on blip, and a drippy, wet RHS tailpipe. Black, smelling of oil but a little less viscous. Unfortunately I didn't know to do and oil cap off test to check for a greater vacuum leak and I forgot the check the coolant bottle for oil contamination. So, here we are. A lot points to AOS and I'm happy with that but what was the ticking noise on coasting along, to immediately disappear on acceleration.? I like the car and worst case is of course the motor is borked. If I take the punt and it is, whats the chance of locally sourcing a replacement engine, and at what risk. Whats the availability of that.? If its an AOS great.! But, and its a big But.. That's all I got, so over to you lot and I all hear you say run away. But... Quote Link to comment Share on other sites More sharing options...
sjm Posted 13June Report Share Posted 13June I would scope the bores. That can be the ticking noise. My ex 996 poured smoke when going up a steep hill, but that was a slight overfill of oil, this one has oil gauge on 2 so probably not the issue. AOS could be the issue with smoke but not likely the ticking. Quote Link to comment Share on other sites More sharing options...
JWM Posted 13June Report Share Posted 13June Stuck hydraulic lifter can cause ticking ... hard to pick up on at first but will get louder over time. Wouldn't explain smoke though. Would be good to go back when it's cold and check the oil for water and the water for oil ... Wouldn't be the first MA96 with a cracked head ... Russ 1 Quote Link to comment Share on other sites More sharing options...
LeeM Posted 13June Report Share Posted 13June That doesn't sound too flash personally, though If it's bollocks cheap (and I mean cheeeeap!), then maybe take a punt and get it sorted. And tips are bloody good fun 👍😁 Quote Link to comment Share on other sites More sharing options...
WOKA Posted 13June Author Report Share Posted 13June 5 hours ago, JWM said: Stuck hydraulic lifter can cause ticking ... hard to pick up on at first but will get louder over time. Wouldn't explain smoke though. Would be good to go back when it's cold and check the oil for water and the water for oil ... Wouldn't be the first MA96 with a cracked head ... Yeah - I think the water has mixed with the wine.. sjm 1 Quote Link to comment Share on other sites More sharing options...
Russ Posted 14June Report Share Posted 14June On 13/06/2024 at 13:19, JWM said: Stuck hydraulic lifter can cause ticking ... hard to pick up on at first but will get louder over time. Wouldn't explain smoke though. Would be good to go back when it's cold and check the oil for water and the water for oil ... Wouldn't be the first MA96 with a cracked head ... yeah sounds like this plus something else (hydraulic lifter will pick up with revs as oil pressure increases) and it's getting cheaper? 🤣 is the service history good or missing some/long gaps between oil changes? Quote Link to comment Share on other sites More sharing options...
tomo Posted 14June Report Share Posted 14June 4 minutes ago, Russ said: yeah sounds like this plus something else (hydraulic lifter will pick up with revs as oil pressure increases) and it's getting cheaper? 🤣 is the service history good or missing some/long gaps between oil changes? Yep ,Bore scope@WOKA. Quote Link to comment Share on other sites More sharing options...
WOKA Posted 14June Author Report Share Posted 14June The ticking was only when I wasn't accelerating, ie, pedal lift off, created, how I can only really describe and card on spoke noise. On gas totally fine idle - no knocking or ticking - just white'ish smoke. Quote Link to comment Share on other sites More sharing options...
Russ Posted 14June Report Share Posted 14June have you sniffed the white smoke? 🤣 does it smell like coolant? (get someone to hold the throttle at 1500-2000 for 10 seconds then blat the throttle) i'd say you're on the right track with AOS/headgasket/cracked head, but i'd say the rattle is a separate issue if it was old i'd guess maybe the intake is sucking ATF from the gearbox via a failed non-return valve or modulator, but i don't think newer boxes use engine vacuum to control shifting. You'll recognise if it's ATF as it's acrid when it burns (it's unforgettable...) i'd borescope from both sides (combustion and crank) and see to be safe if it all turns bad you can always do this WOKA, P-Kay and micknine01 3 Quote Link to comment Share on other sites More sharing options...
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