Date: Tue, 15 May 2012 20:47:52 -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: <CAJPo2u0ZZ-peXCRTxgtX4=qepFxJmtBCQq-TF62-0BO8oU-6Mg@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-2; format=flowed
cool, no problem.
On 5/15/2012 8:18 PM, Angus Gordon wrote:
> Scott, Chris was pointing out (correctly) the fact that an oil
> pressure measurement as an indication of engine health is meaningless
> without knowing the temperature. That's all. Nothing to contest.
> Simple fact.
>
>
> Angus
> www.wordless.me
>
>
> On Tue, May 15, 2012 at 7:42 PM, Scott Daniel - Turbovans
> <scottdaniel@turbovans.com> wrote:
>> 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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