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Old 12th October 2019, 21:30   #41
SD1too
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You're close; three! But the number of belts isn't the issue. The challenge is that when the primary belt is released, all four camshafts move. Two sprockets then have to be held in a precise position (against valve spring force) whilst the new belt is threaded around the water pump, idler wheel, crankshaft and hydraulic tensioner. Trying to do that single-handed using Tippex marks really is a folly.

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Old 13th October 2019, 18:11   #42
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Thinking about it, on the twin cam engines I have worked on, there was usually a way of locking the camshafts, either with a toothed insert between them or bolts through a spoke into the head. I always tippexed marked all sprockets, just in case I lost the timing/dropped the locking device. Some timing marks are very indistinct.
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Old 13th October 2019, 18:31   #43
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The tools for locking the camshafts in the KV6 are available from Rimmers at the bargain price of £318 + shipping! https://rimmerbros.com/Item--i-RX1609
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Old 13th October 2019, 18:55   #44
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Quote:
Originally Posted by SD1too View Post
You're close; three! But the number of belts isn't the issue. The challenge is that when the primary belt is released, all four camshafts move. Two sprockets then have to be held in a precise position (against valve spring force) whilst the new belt is threaded around the water pump, idler wheel, crankshaft and hydraulic tensioner. Trying to do that single-handed using Tippex marks really is a folly.

Simon
I wonder if there is anyone on the forum with those tools and if they would hire them out to another forum member.
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Old 13th October 2019, 19:05   #45
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Quote:
Originally Posted by stevestrat View Post
The tools for ... the KV6 are available from Rimmers at the bargain price of £318 + shipping!
If this is Laser Tools part no,. 4577 then it's the sensible choice at £190! (There are other options).

Quote:
Originally Posted by Comfortably Numb View Post
... on the twin cam engines I have worked on, there was usually a way of locking the camshafts ..
The KV6 is, of course, a quad cam engine and there IS a way of locking the camshafts: use the service tools!
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I always tippexed marked all sprockets, just in case I lost the timing/dropped the locking device.
The KV6 service tools make Tippex marks redundant. They're unique in that they lock the camshafts but allow rotation of the sprocket wheels which greatly assists the belt lacing process. If you ever come to do it, you will understand what I mean.

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Old 27th October 2019, 15:20   #46
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Talked to my mechanic and he also said that he can do the job without the tools but you can't get the timing 100% flawless without the special tools and I studied a little the issue and it makes perfect sense. He recommended me that I find the tools and buy them because at his supplier they cost about 250 euros, and I found them as new, never used, from a source I have in my home country, Romania. At the amazing price of 136 pounds plus shipping. If anyone is interested, I will buy and send them to each member that is in need of them, worth every penny as this is a job that everybody will eventually have to do at some time.

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Old 27th October 2019, 17:31   #47
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I found this: https://www.aliexpress.com/item/32827537300.html
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Old 27th October 2019, 19:44   #48
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I'm never even looking anymore at chinese NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- no matter what it is or what it is used for, especially if it's car related. Done that mistake for some times and it always costs you a lot more in the end.
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Old 28th October 2019, 22:30   #49
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Quote:
Originally Posted by COLVERT View Post
-If an engine becomes---Oil Starved---the first thing it will do is seize up.--
The top of the KV6 can become oil starved leading to tappet noise, tappet wear and worn camshafts. I had this. Cause yet to be determined - possibly combination of very very slightly damaged bottom end bearing and aging oil pump.

To the OP - I have read of a couple of cases of one of the pulleys on the secondary belts failing. You will see that one is an ordinary sprocket, the other incorporates a vibration damper. Of the two instances I have read, the rubber part holding the inner and outer parts of the damper pulley had failed. I don't know if any visible signs of failure must be there before any symptoms arise. But it is a known although rare problem. Possibly it is starting to fail (or could be something else entirely).
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Old 29th October 2019, 12:00   #50
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Well the only logical hypothesis for the tappet noise would be either "clogged" or smudgy or dirty or name it how you want tappets because of oil residues or tappets wear that would be a cause, as you said, of an aging pump, which is highly unlikeable I guess and very rare, they rarely fail and when they do, you'll certainly know it haha. As I said, I added a Lukoil tappets additive which should clean the tappets and should be really good as I've read, but not even the slightest improvement to be heard. At this point it's still a guessing game, once the things are stripped down then I can see what's what. I ordered the timing tools and then I'll get to it, I hope it's just the secondary belts aging related wear causing the ticking and not one of the pulleys, especially the ones with the damper as you said, because they cost a small fortune
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