Discussion
this is the 2nd video, better sound quality.
https://www.youtube.com/watch?v=4KKnZcBh29A
I did check the noise from the auxiliary shaft and the noise appears to be coming either from the bottom of the engine (i.e crankshaft area) or from the timing chain front, again near the bottom.
does a worn chain guide or components make this noise or even the crankshaft bearings etc....?
https://www.youtube.com/watch?v=4KKnZcBh29A
I did check the noise from the auxiliary shaft and the noise appears to be coming either from the bottom of the engine (i.e crankshaft area) or from the timing chain front, again near the bottom.
does a worn chain guide or components make this noise or even the crankshaft bearings etc....?
Edited by Chimp871 on Wednesday 6th June 21:24
Edited by Chimp871 on Wednesday 6th June 21:24
the engine history 4.2 P reg 44k, not been pulled at any stage during it's life.
There is no vibration with the sound just the noise.
I'm willing to pull the engine out and rebuild in September but until then I'd like to see if it's been heard before and see if there's anything to look into up to that point.
Daftly I was thinking maybe change the oil as you would with noise rockers/tappets.
Anything worth looking at, common suspects etc. Either way I'll be doing the work myself, a rule I set myself since buying my chimaera.
PS - What's the half time bearing?
There is no vibration with the sound just the noise.
I'm willing to pull the engine out and rebuild in September but until then I'd like to see if it's been heard before and see if there's anything to look into up to that point.
Daftly I was thinking maybe change the oil as you would with noise rockers/tappets.
Anything worth looking at, common suspects etc. Either way I'll be doing the work myself, a rule I set myself since buying my chimaera.
PS - What's the half time bearing?
Edited by Chimp871 on Wednesday 6th June 21:25
Edited by Chimp871 on Wednesday 6th June 21:27
Chimp871 said:
this is the 2nd video, better sound quality.
https://www.youtube.com/watch?v=4KKnZcBh29A
I did check the noise from the auxiliary shaft and the noise appears to be coming either from the bottom of the engine (i.e crankshaft area) or from the timing chain front, again near the bottom.
does a worn chain guide or components make this noise or even the crankshaft bearings etc....?
Christ ! Mines been doing that for the last 50K !! https://www.youtube.com/watch?v=4KKnZcBh29A
I did check the noise from the auxiliary shaft and the noise appears to be coming either from the bottom of the engine (i.e crankshaft area) or from the timing chain front, again near the bottom.
does a worn chain guide or components make this noise or even the crankshaft bearings etc....?
Perhaps we'll get a group discount then 
Sort of glad to hear someone has similar noise and worked fine.
Care to post a video/sound clip to compare?
Going over the ajp engine rebuild manual last night (Google it, you can download it for free) I'm edging towards bearing noise and not crank related.
But bad bearings, especially those on a timing chain, do need to be sorted.
Out of curiosity, how much does an engine refresh cost if I pull it myself and pallet ship to whomever?
Sort of glad to hear someone has similar noise and worked fine.Care to post a video/sound clip to compare?
Going over the ajp engine rebuild manual last night (Google it, you can download it for free) I'm edging towards bearing noise and not crank related.
But bad bearings, especially those on a timing chain, do need to be sorted.
Out of curiosity, how much does an engine refresh cost if I pull it myself and pallet ship to whomever?
Ask Byker28i... he has recently been down this road. This is the thread about it: https://www.pistonheads.com/gassing/topic.asp?h=0&...
On mine, amongst other things, the roller bearing supporting the crank nose in the timing case had broken up, I found bits of the cage in the sump but all the rollers were intact, as was the crank.
(Edited to add link to thread)
On mine, amongst other things, the roller bearing supporting the crank nose in the timing case had broken up, I found bits of the cage in the sump but all the rollers were intact, as was the crank.
(Edited to add link to thread)
Edited by TwinKam on Thursday 7th June 09:21
TwinKam said:
On mine, amongst other things, the roller bearing supporting the crank nose in the timing case had broken up, I found bits of the cage in the sump but all the rollers were intact, as was the crank.
Fortunately mine survived this abuse, when the PO dropped a bolt (probably a sprocket bolt) down the timing cover and didn't bother to retrieve it
Chimp871 said:
Perhaps we'll get a group discount then Sort of glad to hear someone has similar noise and worked fine.
Care to post a video/sound clip to compare?
Going over the ajp engine rebuild manual last night (Google it, you can download it for free) I'm edging towards bearing noise and not crank related.
But bad bearings, especially those on a timing chain, do need to be sorted.
Out of curiosity, how much does an engine refresh cost if I pull it myself and pallet ship to whomever?
What are you classing as a refresh?! Sort of glad to hear someone has similar noise and worked fine.Care to post a video/sound clip to compare?
Going over the ajp engine rebuild manual last night (Google it, you can download it for free) I'm edging towards bearing noise and not crank related.
But bad bearings, especially those on a timing chain, do need to be sorted.
Out of curiosity, how much does an engine refresh cost if I pull it myself and pallet ship to whomever?
TwinKam said:
Ask Byker28i... he has recently been down this road. This is the thread about it: https://www.pistonheads.com/gassing/topic.asp?h=0&...
On mine, amongst other things, the roller bearing supporting the crank nose in the timing case had broken up, I found bits of the cage in the sump but all the rollers were intact, as was the crank.
(Edited to add link to thread)
I read that, and contributed a little. It didn't say (or couldn't find) the root cause e.g. bearing failure, seems cylinder pressure was down and then that led to the engine being pulled and the problems multiplying as did the cost. On mine, amongst other things, the roller bearing supporting the crank nose in the timing case had broken up, I found bits of the cage in the sump but all the rollers were intact, as was the crank.
(Edited to add link to thread)
Edited by TwinKam on Thursday 7th June 09:21
Joolz was on that thread and is someone we usually take as gospel. There's nothing wrong with an engine refresh and essential upgrades.
As to the picture above - shocking especially as its not TVR's fault for once!
Jhonno said:
What are you classing as a refresh?!
all bearings, seals, gaskets, bolts replacedhead skim, block cleaned and pressure checked, cylinders honed
tolerance checks: valve/guides/seats checked, pistons, cylinder, jack shaft, auxiliary shaft
rebuild: oil and water pumps
This is minimum, sure there's stuff missing e.g. clutch etc.
The big question will be whether to take the opportunity to switch to forged crank and bore the block to take the larger journal crank (£2k). I'd probably err on side of keep the original as, like the Porsche IMS bearing, some will fail and some won't but words spreads as does the fear of it, same as the 4.2 small journal cranks.
Just my 0.02
Chimp871 said:
all bearings, seals, gaskets, bolts replaced
head skim, block cleaned and pressure checked, cylinders honed
tolerance checks: valve/guides/seats checked, pistons, cylinder, jack shaft, auxiliary shaft
rebuild: oil and water pumps
This is minimum, sure there's stuff missing e.g. clutch etc.
The big question will be whether to take the opportunity to switch to forged crank and bore the block to take the larger journal crank (£2k). I'd probably err on side of keep the original as, like the Porsche IMS bearing, some will fail and some won't but words spreads as does the fear of it, same as the 4.2 small journal cranks.
Just my 0.02
Some time ago I had some contact with Andy at APM and he quoted me £5K.head skim, block cleaned and pressure checked, cylinders honed
tolerance checks: valve/guides/seats checked, pistons, cylinder, jack shaft, auxiliary shaft
rebuild: oil and water pumps
This is minimum, sure there's stuff missing e.g. clutch etc.
The big question will be whether to take the opportunity to switch to forged crank and bore the block to take the larger journal crank (£2k). I'd probably err on side of keep the original as, like the Porsche IMS bearing, some will fail and some won't but words spreads as does the fear of it, same as the 4.2 small journal cranks.
Just my 0.02
Mr Cerbera said:
Some time ago I had some contact with Andy at APM and he quoted me £5K.
In my head I've always had that figure in mind if I were to hand over the engine to someone elseHowever since Byker28i managed to spend three times that much, I'm probably fooling myself (albeit that included the crank upgrade)
As for the whine, I would be tempted to pull the alternator belt, just to rule that out
(and I'd do the same with the PS coupler as well!)
PAS ruled out as the whine was there before and assumed it was the saxo electric motor, since (with your help) converted back to original hydraulic, noise is still there though.
Will pull the alternator belt.
On the plus side I've now fixed rain leaking into cabin (window seals resealed and driver door card speaker area waterproofed) and also the aircon (faulty refill high pressure valve) and have cold air but strangely no blue led light!
Will pull the alternator belt.
On the plus side I've now fixed rain leaking into cabin (window seals resealed and driver door card speaker area waterproofed) and also the aircon (faulty refill high pressure valve) and have cold air but strangely no blue led light!
Edited by Chimp871 on Thursday 7th June 13:31
Chimp871 said:
I read that, and contributed a little. It didn't say (or couldn't find) the root cause e.g. bearing failure, seems cylinder pressure was down and then that led to the engine being pulled and the problems multiplying as did the cost.
Joolz was on that thread and is someone we usually take as gospel. There's nothing wrong with an engine refresh and essential upgrades.
As to the picture above - shocking especially as its not TVR's fault for once!
Root cause was low compression on cylinders 1&2. This was because it was an early engine with brass valve guides and chrome valves.Joolz was on that thread and is someone we usually take as gospel. There's nothing wrong with an engine refresh and essential upgrades.
As to the picture above - shocking especially as its not TVR's fault for once!
Turn the head upside down and the two badly affected valve guides fell out the head!
No other problems apart from that, the engine was pulled before any further problems developed. I was hoping it was just head work, however to get the engine up to the best spec meant a lot of work on the early engine. Stupid to have it all apart and not do that as the car is a keeper.
Costs are in that thread. No one would warranty the engine with the small bearing crank so that was swapped. That almost £2k.
All the cost was in bringing the engine up to the best spec.
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