Turbo cooked Oil?
Discussion
After a great weekend at Shakey, it appears I have cooked my oil after 4 runs on the strip. Checked the level before leaving and it was clear on the dipstick having only done about 150 miles since the oil change, Valvoline 20/50. However changing the oil last night it was as black as your hat. I suppose the increased heat generated by the turbo has cooked it.
I have had a suggestion on what to use but I throw it out to you chaps to offer advice and any suggestions.
Thanks
Barrie
I have had a suggestion on what to use but I throw it out to you chaps to offer advice and any suggestions.
Thanks
Barrie
Interesting.
Why should that be?
The oil shouldn't become contaminated by the turbo and the heat generated after one run at a time is minimal.
Mine heats up really quickly and at Shakey, oil temp was say 75 at the beginning of a run and was 92 at the end so far from being a worry.
I've seen 115 degrees on track pre bigger cooler.
It sounds like your oil is contaminated, turbo seal?
Why should that be?
The oil shouldn't become contaminated by the turbo and the heat generated after one run at a time is minimal.
Mine heats up really quickly and at Shakey, oil temp was say 75 at the beginning of a run and was 92 at the end so far from being a worry.
I've seen 115 degrees on track pre bigger cooler.
It sounds like your oil is contaminated, turbo seal?
phazed said:
Interesting.
Why should that be?
The oil shouldn't become contaminated by the turbo and the heat generated after one run at a time is minimal.
Mine heats up really quickly and at Shakey, oil temp was say 75 at the beginning of a run and was 92 at the end so far from being a worry.
I've seen 115 degrees on track pre bigger cooler.
It sounds like your oil is contaminated, turbo seal?
+1Why should that be?
The oil shouldn't become contaminated by the turbo and the heat generated after one run at a time is minimal.
Mine heats up really quickly and at Shakey, oil temp was say 75 at the beginning of a run and was 92 at the end so far from being a worry.
I've seen 115 degrees on track pre bigger cooler.
It sounds like your oil is contaminated, turbo seal?
Even if you boil oil its colour does not change much and certainly does not go black.
Sounds like contamination.
Carbon from combustion products in blow-by gases being forced past the rings. Be surprising if it didn't happen; oil does need changing more often on blown motors.
You'd smell it a mile away if you'd burnt the oil but you're wise to be wary of excessive oil temperatures. Mine was hitting 120deg with little effort without a cooler (which is not dangerous in itself but offers but too little headroom for my taste), now pretty stable in mid 90s (only seen it once above 100) with a 19 row Mocal in the flat panel in front of the rad (ie lying horizontalish and taking air from the nose void)
You'd smell it a mile away if you'd burnt the oil but you're wise to be wary of excessive oil temperatures. Mine was hitting 120deg with little effort without a cooler (which is not dangerous in itself but offers but too little headroom for my taste), now pretty stable in mid 90s (only seen it once above 100) with a 19 row Mocal in the flat panel in front of the rad (ie lying horizontalish and taking air from the nose void)
I used to use 20/50. Can't say I had blowby or cooking problems. The problem was getting a decent api specification. In the end I stopped buying synthetic as I'd found a source for genuine Ford approved 20/50. I hated the thin oils that were available, or rather, my engine did.
Eta, if the engines over fuelling the oil will stink of petrol as well as having carbon particulates in it.
Eta, if the engines over fuelling the oil will stink of petrol as well as having carbon particulates in it.
phazed said:
Damm these turbo negatives!
I know where you are coming from Peter. What you have to take in to consideration is that I have stuck a turbo on to a standard engine that has never been taken. I anticipated that thing might happen, to that end I was prepared for a refresh at some point. As Mack has said the results are worth every penny. I am more than happy from the results and if all it needs is a freshen up, happy days. I was thinking of having to buy a new short engine at some point.....Cos 5ltr engines always break their cranks, don't they ;-)Sardonicus said:
Get a leak down test carried out Baz, you may find all you need is a 're-ring and a set of bearings, I would be gob smacked if your motor needs boring,pistons or crank grind in fact it may be a crankcase breathing issue that needs addressing
You are a TVR specialist ,do you repair ,service and upgrade TVR`s for a living ?
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