

| Subject: | Re: nuts vs head gasket job |
| From: | Jim Felder |
| Date: | Thu, 5 Sep 2013 12:29:51 -0500 |
You can do the clutch in a non-vw (regular old murkan Harbor Freight stand or similar) with some 6 inch pipe nipples to use as standoffs to give you clearance to get to the flywheel, clutch and pressure plate. Use allthread to hold it all together. I have use this setup dozens of times with no problems at all. Jim On Thu, Sep 5, 2013 at 12:13 PM, Tom Carchrae <tom@carchrae.net> wrote: > Thanks Angus. I saw this home made hoist - which I think Neil linked to on > the samba (unfortunately his hoist pics were broken links) ; > https://sites.google.com/site/wavanagon/87westfaliaenginework > > Stuart, thanks. Princess auto seems to have quite a few stands, not sure > if I could easily attach the VW adapter (or if it is needed) > http://www.princessauto.com/pal/en/Engine-Stands/1000-330-120-105-105.c - > but seeing as I'm not going to be able to roll the stand around, perhaps > buying an adaptor like the one you linked might be a better choice if I > fasten it to something of adequate strength. I should look around some > more, or see if anyone in Vancouver is not mid-rebuild and would like to > sell or loan me one. > > > > > On Thu, Sep 5, 2013 at 9:09 AM, Angus Gordon <birdworks@gmail.com> wrote: > > > > > Tom, the 2x4 hoist is to lower the engine down to the ground, not to > hoist > > it up into the vehicle. Lower it onto a piece of plywood and you can pull > > that around on the gravel. > > > > Angus > > > > > > On Thu, Sep 5, 2013 at 4:34 AM, Tom Carchrae <tom@carchrae.net> wrote: > > > >> Scott: in terms of stand or hoist - I don't have a garage. I've been > >> prepared to work on the heads without removing the engine, but if I am > >> going to go to the trouble of undressing the top of the engine, I may as > >> well pull the engine out and have a look at the clutch and so on, and it > >> sounds much easier to work on the heads if you can rotate the engine. > >> Good to know that I could rig up a 2 x 4 hoist, my drive is gravel, so a > >> hoist with wheels would be nearly useless. I'm thinking a 2 x 4 hoist, > >> then slide it to the centre of the van, mount on a stand, and work away. > >> > >> And yes, there have been enough heebie geebies, although I have had > >> several > >> decent shops look at it and none have been sure it was a head gasket > >> issue. > >> It might be a cracked head that farts under load... any which way, I > >> suspect the heads have had abuse and could at least use the JB beauty > >> treatment on their pockmarks, if not replacement. They are AMC heads, > and > >> I think they've been on there for less than a decade. > >> > >> ORR; too right. I get awfully confused in metric imperial Canada. I > grew > >> up in Ireland, where the distances were in miles and speeds in KM/H - no > >> wonder they produce some good mathematicians. > >> > >> Tom > >> > >> > >> > >> > >> > >> > >> On Wed, Sep 4, 2013 at 9:42 PM, OlRivrRat <OlRivrRat@comcast.net> > wrote: > >> > >> > Tom > >> > > >> > 220�C = 428�F ~ I doubt very much that your engine would have > >> been > >> > able to achieve that CoolentTemp ~ pretty sure it would have seized > &or > >> > blown all sorts of hoses off long before it got to that Temp' ~ If you > >> > meant 220�F then that's not really terrible ~ not good but not > terrible > >> ~ > >> > > >> > > >> > ORR ~ DeanB > >> > > >> > > >> > > >> > On 4 Sep , 2013, at 9:45 PM, Tom Carchrae wrote: > >> > > >> > Jim: I guess I got lucky - no coolant drips. But you make a good > point > >> >> about what a crazy system that is and why it is prone to failure. > >> >> > >> >> Scott: I have tried a few blue caps. I need to make a cap tester > >> and/or > >> >> run the van with a pressure gauge on the expansion tank when the van > is > >> >> running. (Test # 2 from > >> >> http://web.archive.org/web/**20050309065156/http://www.** > >> >> bostonengine.com/articles/**waterboxes.html< > >> > http://web.archive.org/web/20050309065156/http://www.bostonengine.com/articles/waterboxes.html > >> > > >> > >> >> ). > >> >> I've previously done a test for exhaust gasses, but no CO2 detected. > I > >> >> have wanted to plumb a pressure gauge into the cooling system for > some > >> >> time > >> >> now - I am not brave (stupid?) enough to put it in on the dash, but I > >> am > >> >> definitely going to rig up a temporary one to the expansion tank. > >> >> > >> >> When I bought the van, I took it to a mechanic, who said, "hey your > >> cap is > >> >> bad, we changed it" - and he did some work on my heads, what I am not > >> sure > >> >> although it involved valve adjustment to fix low compression. After > >> this, > >> >> the cooling system started blowing up here and there and nearly $2k > >> later > >> >> I > >> >> was broke and annoyed and have not returned to that mechanic. I then > >> said > >> >> screw this and have most of the work on the van myself since. I > drove > >> it > >> >> across western Canada and the cooling system blew up twice more on > me - > >> >> after the first time, I changed the cap to another spare I had > bought. > >> >> The > >> >> second time was due to air in the radiator and a giant traffic jam (a > >> >> massive mud slide on Hwy 1) and the van actually overheated (went to > >> >> ~220oC > >> >> and it was full of water) and the coolant sensor popped off - its > >> >> whereabouts are still unknown. Both times the van was pretty heat > >> soaked > >> >> and running at slow speeds - I learned a lesson there. > >> >> > >> >> So, yeah, it is probably due. And I actually enjoy working on it, so > >> it's > >> >> not all bad. > >> >> > >> >> Btw, are there any engine stands and hoists that are specifically > >> designed > >> >> for working inside your van? :) > >> >> > >> >> Tom > >> >> > >> >> > >> >> > >> >> > >> >> > >> >> On Wed, Sep 4, 2013 at 6:25 PM, Scott Daniel < > >> scottdaniel@turbovans.com>* > >> >> *wrote: > >> > >> >> > >> >> PS to my last post. > >> >>> Make sure it's not the blue pressure cap. Try another one. They are > >> >>> notoriously flakey sometimes. > >> >>> > >> >>> > >> >>> > >> >>> On 9/4/2013 4:37 PM, Jim Felder wrote: > >> >>> > >> >>> The head bolts and the heads do two things simultaneously, and do > >> only > >> >>>> one > >> >>>> of them very well. > >> >>>> > >> >>>> They hold the aluminum ring that serves as a true head gasket; that > >> is, > >> >>>> that gasket confines the compression gases to within the cylinder, > >> >>>> without > >> >>>> leaking it to the outside world. The other thing that is going on > is > >> >>>> that > >> >>>> the head also squeezes a rubber gasket between the head and the > water > >> >>>> jacket on the block. This is imprecise. Normally, the compression > >> head > >> >>>> gaskets do not fail very often. That is not true of the outer water > >> >>>> gasket > >> >>>> which is held in place by the same head bolts. Think of it s a > circle > >> >>>> (actually two circles on each side) of metal, with very precise > >> clamping > >> >>>> pressure to hold in the combustion gasses, surrounded by a rubber > >> gasket > >> >>>> which deteriorates, holding in the coolant. > >> >>>> > >> >>>> Guess which is going to go first? > >> >>>> > >> >>>> Yep, the rubber. If your head bolts are tight enough to contain the > >> >>>> combustion gasses, but you are leaking water, you are not going to > >> >>>> affect > >> >>>> the rubber more than a thousandths or two by tightening the already > >> >>>> tight > >> >>>> bolts holding the compression gaskets in place. If you are leaking > >> >>>> coolant, > >> >>>> it is because your rubber gaskets have a breech somewhere, not > >> because > >> >>>> there is not enough pressure on them. > >> >>>> > >> >>>> It always makes me feel better to go through the procedure or > >> tightening > >> >>>> the bolts as you suggest, but, in the end, you will have to pull > the > >> >>>> heads > >> >>>> and replace the outer rubber gaskets. > >> >>>> > >> >>>> Jim > >> >>>> > >> >>>> > >> >>>> On Wed, Sep 4, 2013 at 11:54 AM, Tom Carchrae <tom@carchrae.net> > >> wrote: > >> >>>> > >> >>>> I've put this off long enough. I got a few trips from my van this > >> >>>> > >> >>>>> summer, > >> >>>>> but on the last day I drove it, it backed up the coolant in the > >> >>>>> reservoir > >> >>>>> (behind licence plate) three times in one day. I would pull over > >> when > >> >>>>> the > >> >>>>> blinking low-coolant light turned on, drain the coolant out into a > >> >>>>> bottle, > >> >>>>> start the vehicle, open the hot pressurized tank, and pour the > >> coolant > >> >>>>> back > >> >>>>> where it belonged. > >> >>>>> > >> >>>>> Yesterday I took the valve covers off and used a torque wrench to > >> >>>>> inspect > >> >>>>> the tightness of the nuts on the heads - well, all the easy to get > >> to > >> >>>>> nuts > >> >>>>> (so all but the two behind the air intake - I have only removed > the > >> air > >> >>>>> filter box so far). > >> >>>>> > >> >>>>> I have only done one side so far, but I found one of the bolts in > >> the > >> >>>>> centre of the head to be slightly under spec (37lb). I recall > >> Dennis > >> >>>>> Hayes > >> >>>>> saying (email below) that this managed to solve head gasket > symptoms > >> >>>>> 50% > >> >>>>> of > >> >>>>> the time if done soon enough. I doubt I have been soon enough, > but > >> how > >> >>>>> does one tell. > >> >>>>> > >> >>>>> I am prepared to do the head removal but boy would I be happy if > it > >> was > >> >>>>> as > >> >>>>> simple as tightening some nuts. Would I be overly hopeful to > think > >> >>>>> that > >> >>>>> this minimal nut tightening this late would save me having to > remove > >> >>>>> the > >> >>>>> heads? > >> >>>>> > >> >>>>> Tom > >> >>>>> > >> >>>>> 84 Vanagon > >> >>>>> > >> >>>>> > >> >>>>> > >> >>>>> > >> >>>>> On Thu, May 9, 2013 at 2:19 PM, Dennis Haynes < > >> d23haynes57@hotmail.com > >> >>>>> > > >> >>>>> wrote: > >> >>>>> > >> >>>>> One problem with relying on the sniffer tests is that they are > >> looking > >> >>>>> > >> >>>>>> > >> >>>>>> for > >> >>>>> > >> >>>>> un-burned hydrocarbons. In order for this to work in addition to > >> the > >> >>>>>> leak > >> >>>>>> you also need a combustion failure in the leaking cylinder. While > >> >>>>>> cracked > >> >>>>>> or > >> >>>>>> loose heads may also cause a combustion issue you are in deep > >> trouble > >> >>>>>> by > >> >>>>>> the > >> >>>>>> point the sniffer tests pick it up. Keep in mind if those gasses > >> can > >> >>>>>> get > >> >>>>>> out > >> >>>>>> in some cases coolant can get into the cylinders. Antifreeze into > >> the > >> >>>>>> cylinders and then into the oil can cause some real damage. Long > >> >>>>>> before > >> >>>>>> antifreeze in the oil is visible the stuff becomes extremely > >> corrosive > >> >>>>>> > >> >>>>>> and > >> >>>>> > >> >>>>> can quickly destroy bearings along with crank and cam surfaces. > It > >> can > >> >>>>>> > >> >>>>>> also > >> >>>>> > >> >>>>> destroy pistons by blowing out the tops and destroying the ring > >> lands. > >> >>>>>> > >> >>>>>> If the engine has ever been overheated, (even before a rebuild) > or > >> has > >> >>>>>> > >> >>>>>> had > >> >>>>> > >> >>>>> the heads off for any reason loose heads can be the cause. I > >> probably > >> >>>>>> > >> >>>>>> have > >> >>>>> > >> >>>>> a > >> >>>>>> better than 50-50 success rate in fixing these issues just be > >> >>>>>> retourqing > >> >>>>>> the > >> >>>>>> heads if the problem has not been left so long that the head > seals > >> >>>>>> > >> >>>>>> (inners) > >> >>>>> > >> >>>>> or the tops of the cylinders have burned or pitted away. > >> >>>>>> > >> >>>>>> Dennis > >> >>>>>> > >> >>>>>> > >> >>>>>> > >> > > >> > > > > >
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