Date: Tue, 15 May 2012 19:42:06 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: what clues about engine health can I get...
In-Reply-To: <A780D19D-341C-45B8-B004-6C4EF885F26F@gmail.com>
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ok....29 psi at 2,000 rpm fully warmed up ..and not hotter than that.
is that the minimum acceptable ?
and what weight oil ? ........ as that is a major factor .
a lot of water boxers with hi miles on them might not make that ..
unless it's on say 40W or 50W oil being used.
On 5/15/2012 6:29 PM, Chris S. wrote:
> Factory oil pressure spec is based on 3 data points: engine speed, temperature and pressure. 2000rpm, 80C, 2 bar. If you're not using 3 data points, you're guessing.
>
> After 2 years of looking at my oil temp and pressure gauges I can tell you that water temp is a poor indicator of oil temp. Therefore, for the purpose of determining engine health, which I though we were discussing, you must use 3 data points or, again, you're guessing. And if a guess is close enough then you're ok.
>
> Chris.
>
> Wysłane z iPhone'a
>
> Dnia May 15, 2012 o godz. 20:02 Scott Daniel - Turbovans<scottdaniel@turbovans.com> napisał(a):
>
>> yes and no..
>> oil temp at first tracks coolant temp.
>> it's going to be at least that warm.
>> then....the more you drive, and the hotter things are ...oil temp goes up and up gradually ..
>> so in terms of not exceeding redline oil temp ...a gauge is useful..
>> otherwise ..
>> you know when it's normal and when it's extra hot ..
>> like when ambient temps are high ....under a lot of load , that's when oil temps can get dangerously high without much in the way of an oil cooler.
>> otherwise ..you know when it's well warmed up but likley not 'that hot.'
>>
>> oil pressure at an oil temp of 'par warmed up' is what of interest.
>>
>> On 5/15/2012 2:22 PM, Chris S. wrote:
>>> Oil pressure gauge is a good start, but you also need oil temp, since the two are very closely related. Half the information is close to no information.
>>>
>>>
>>> Chris.
>>>
>>> Wysłane z iPhone'a
>>>
>>> Dnia May 15, 2012 o godz. 15:33 Scott Daniel - Turbovans<scottdaniel@TURBOVANS.COM> napisał(a):
>>>
>>>> that's how to tell really how good/bad it is ..
>>>> running it.
>>>> oil pressure gauge on it then would be nice too. That's important info
>>>> on gauging engine condition and life remaining of course.
>>>>
>>>> On 5/15/2012 7:59 AM, Alistair Bell wrote:
>>>>> will do. I bet some of the lifters will be collapsed, motor has been sitting as is for a few years.
>>>>>
>>>>> Depending on the comp. test results, I might swap the engine in early next month. I'll be dropping trans and engine on my van then (for other reasons) and the current engine has a couple of annoying leaks that need dealing with. So I might gamble with the spare while I fix up the other one.
>>>>>
>>>>> alistair
>>>>>
>>>>>
>>>>> On 2012-05-15, at 4:49 AM, Kenneth Lewis wrote:
>>>>>
>>>>>> Alistar,
>>>>>> Pull the rocker arms and look for mushrooming valve stem ends. If you are
>>>>>> not going to use the engine for a while, just leave them off to relieve
>>>>>> pressure on the springs and hydraulic lifters. Check for collapsed or
>>>>>> spongy lifters.
>>>>>>
>>>>>> Ken
>>>>>>
>>>>>>
>>>>>> On Mon, May 14, 2012 4:11 pm, Alistair Bell wrote:
>>>>>>> when engine on bench?
>>>>>>>
>>>>>>> I had to move my spare engine, again, while working in the barn. I need
>>>>>>> to decide what to do with it. Came as a spare with my syncro. was given to
>>>>>>> the seller by a friend. Supposedly pulled from van to make way for
>>>>>>> conversion.
>>>>>>>
>>>>>>> What I can see upon casual observation:
>>>>>>>
>>>>>>> - oil leak from base of crankcase breather tower (seen that before!)
>>>>>>> - minor oil weeping from one valve cover
>>>>>>> - pushrod tubes shiny, oil and rust free
>>>>>>> - oil pump endplay 0.004" (good)
>>>>>>> - water pump seized
>>>>>>> - crank can be rotated, there is compression. I suppose I could rig up my
>>>>>>> spare bellhousing and starter to spin the bugger and test compression.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> So what else can I look at apart from pulling the heads?
>>>>>>>
>>>>>>> alistair
>>>>>>>
>>>>>>>
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