Joseph C Participant. Or: — White Lithium grease? Viewing 3 replies - 1 through 3 of 3 total. October 24, at am Frank Gonzalez Participant. October 24, at pm Not a hijack at all, a good question I wouldn't mind an answer to as well And I do note that in the manual it gives the torque figure for the second stage of second time tightening down as 76ft lb "or if an angle wrench is available tighten bolts 85 - 90 degrees clockwise".
Do I take it that the 90degree measurement is likely to be the more accurate of the two for the reasons Diamondsink has given? As opposed to my thirty year old torque wrench and threads that, though cleaned, have had K's worth of crud wash over them Is the best of both worlds perhaps to take it up to the first setting, 22ft lbs, relying on the torque wrench, then use it to do the second stage tightening whilst carefully noting the angle turned before it clicks for If significantly less than 90degrees then keep on turning to that point?
Which isn't difficult to do, you hardly need a dial gauge to do a fairly accurate 90deg as long as you keep wits about you To distribute the engine oil in the threads evenly and to make sure that any crud or obstructions in the threads have been crushed out of the way If not then does any engineer know why Nissan adopt this two stage process? When the bolts are said not to be stretch bolts. Intrigued to know, has always bothered my curiousity bone.
Nah, they're not too bad, as clean as I can get them and I've run an old used head bolt up and down each of them a couple of times using fingers only to turn it to make sure. Moves pretty smoothly and consistently in them all. Will definitely be careful to observe the angle movement required for final torquing tho, if less than 90 degrees I will be carrying on to the full Makes a lot of sense. I always lube the threads and the head of the bolt where the washer sits.
The torque is too inconsistent otherwise as it jumps round rather than pulling smoothly. In this case, lubrication with engine oil will NOT decrease the torsional slip markedly. Although VW and many technical books do not mention the use of oil, I believe their specs are considered with the use of oil. The other factor for head bolt tightening for accuracy is to chase the threads in the block.
In my opinion, this is a required step. There are occasions that rust or debris in the bolt hole will create a torque spike. We oil the tap when chasing threads and use air to blow out each bolt hole.
I put ARP lube or similar under the head bolt as due to the low torque before 90 degree's, it won't really affect the total torque. And as mentioned, you won't that big "crack" sound due to metal on metal and it will stop galling. Blacktree Veteran Member. Generally speaking, it's expected that you put a light coat of engine oil on cylinder head bolt threads. There are some engines where you have to apply sealant to the bolt threads, because the bolt holes go into the coolant passages. But I don't think that's the case with the TDI engines.
Value my car , miles buy or sell? Related posts Focus 1. Elsewhere on. Money Saving Offers, Deals and Discounts. Keyless theft: What is it and how do you stop it? Hiring rather than buying? Our guide will save you money. NEW: Child seat chooser - Don't buy a car seat until you've used this. DVLA confirms that some overs licence renewals cannot be done online.
New Toyota Aygo X revealed. Top Best-selling cars in October Wed 14 Jun Head Bolts -should I lubricate - peter I'm changing the head gasket on my car. Just wondering what the general concensus or standard procedure is on this. Wed 14 Jun Head Bolts -should I lubricate - hardway. I do lubricate "stretch" head bolts but on the underside of the bolt face. I use graphite powder.
0コメント