Herman K

I'm starting my TBW project today by draining the coolant from the radiator and the engine.

When I unscrewed the radiator drain plug it snapped half way on the thread I did solve that by inserting a heated tip of a screw driver in the remainder and was able to get it out.

When I removed the engine drain plug on the DS side I got a normal stream of coolant coming out but I found that the PS was dry and had a lot of sediment behind the plug after some severe poking I managed to get some coolant to run out and the passge feel clear now when I insert a small screw driver.

The question is do I require some additonal flushing or install drains that can be opened when the system is under pressure in order to blow out some more remaining sediment (if there's any)

If anybody has had some similar experience I would like to know.

Thanks

blown 87

Just get a new one and install it, i try to keep at least 3 in my tool box all the time, you can so very easily tighten them to much and break them when they come out.

Many folks here have been there.

Tails

Herman.
Drain plug: BTDT, a cheap replacement part.

PS crankcase drain plug: I would pressure flush the block to ensure that the PS drain is clear by using cold water via a hose from your cold water tap.

Pressure flush with DS drain plug installed. so you force drainage from PS drain.

When clear then put PS in and remove DS and pressure flush DS to ensure all is clear.

I would not try to clear drains when block is hot and under pressure, 90 decrees C water under pressure and it is hot enough to inflict sever burns.

Tails 1990 928S4 Auto

Herman K

Thanks Greg

Have you any seen any engine drains that had sediment behind the plugs blocking the coolant from draining until you poked out the sediment?

Herman K

Thanks for your advise

Mrmerlin

sediment is a common issue on cars that have not had the coolant system refreshed every few years

Lizard928

Herman,

I have seen this before. It is normally metal shavings from the water pump impellor eating into the block.....

It could be from a past pump, or the one in there.

blown 87

Yep, in every fluid a car holds.