Yes true, for older engines especially if you've NEVER used fully syn before, some of the wear and tear in the internal areas are sealed by little bit of sludges and clogs. If you suddenly use fully syn (or even do an engine flush) you might dislodge these and cause problems.
So for old engines, if it's working, don't mess with it. Just stick back to the same engine oil you've been using all these while, whether mineral or semi-syn.
here's a good resource to read up on engine oils ->
http://www.carbibles.com/engineoil_bible.htmlFor the water pump, normally yes because once you've removed the parts to access the timing belt, you might as well change the water pump as well as there is wear and tear. Ori Proton water pump should cost less than RM100, around RM50 if I'm not wrong so most mechanics will recommend to change it to avoid future repeat labor to remove all the parts.
I changed my timing belt + water pump + engine mountings last year total about RM600 I think. Engine mountings was a big differentiator, if your iswara is shaking all over, consider changing the mountings, well worth the money spent.
Your local spare part shop (by now, I hope you have a regular spare part shop, if not, start looking for one!) should be able to quote you the prices for these various parts then you can see if mechanic overcharging you or not. Sometimes I will buy the parts myself, bring to nearby petrol station mechanic and get them to change for me. And to get on their good books (since I didn't buy the parts from them), I normally give the mechanic extra tip for the labour
so far they are happy
and I am happy too cause I know the source of my parts and any issue, I just go back to the regular spare part shop and hantam them
Never need to do that so far
QUOTE(fantagero @ Feb 16 2012, 04:38 PM)
but according to mechanic guy, better buy normal engine oil, he said if use full syn, can cause sludge or berketul.. true or not??
next on the list, timing belt and the rest of the belt..
in Malaysia, is it recommended to change the water pump together with the belts?
quoted around rm200 for the belt change. sounds cheap
Added on February 17, 2012, 9:24 amNah, Iswara pump for sure is below RM100. It's cheap. For RM200, you're talking about conti cars water pump already, I know I've gone through that before
QUOTE(Quazacolt @ Feb 16 2012, 08:37 PM)
pump oem replacement iinm also between rm100-200, original ones i dont think can find for our cars already. its not something as cheap as mere timing belts/spark plug. if you rich, then by all means go ahead. else, change only when its spoil or not performing up to par, is more than sufficient.
Added on February 17, 2012, 9:29 amyou should not be worrying about what the mechanic need to do to change the pump if it dies....
do you understand the function of a water pump and how it is built? It has small impellers, driven by the accessory belts.
These impellers are like small motorboat engines driving the coolant through the engine block/radiator.
if it fails while driving what would happen imagine?
If it's really old and the impellers actually BROKE off, what will happen imagine?
For me, I won't take the risk, RM50+ is a small price to pay for the water pump, change that each time you change your timing belt, e.g. 60k or 80k mileage.
QUOTE(fantagero @ Feb 16 2012, 08:30 PM)
let say, if my water pump die after i change the belt, mechanic still have to do the same process to change the pump right? doesn't it cost more?
Feb 7 2012, 08:51 AM
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