water pump on 318

[acton mike]

while doing the timing chain on my 318 I find myself falling victim oe the mightaswell syndrome - mightaswell change the waterpump while i am at it

makes good sense when one thinks about it

the pump had to come off anyway

the question I have would be valid even if I was putting the old pump back on again

some of the bolts pass through the water jackets in the block

I understand that a sealant should be used on the threads

the question is - what does one use as a sealant?

[Speed Dragon]

Silicone or anti-seize. I'd probably smear the whole bolt w/ anti-seize.

[Megunticook]

while doing the timing chain on my 318 I find myself falling victim oe the mightaswell syndrome - mightaswell change the waterpump while i am at it

makes good sense when one thinks about it
Smart.


some of the bolts pass through the water jackets in the block

I understand that a sealant should be used on the threads

the question is - what does one use as a sealant?
Teflon paste is the most effective thread compound for sealing out fluids from threaded fasteners. I use a product called TFE, but if you just go down to your local hardware I'm sure they have something.

I agree with Speed on antiseize for the shank of the bolt, though, and maybe even behind the head a little. I've never dealt with a seized waterpump bolt but it sounds like a real nightmare.

[acton mike]

I imagine a siexed water pump bolt would be a real bast!!d to get out; thebthreads are recesseds a long way into the block

[GHS]

Yep, change it while you're there, and get a new pump, not a reman. They are only slightly more expensive.

Those bolts will often disintegrate from rust, so when you remove them, take care not to put too much stress in one direction. Carefully tighten and loosen the bolt to break the rust free before removing them. A broken bolt that's rusted into the block is a real pain...and don't ask me how I know.

Replace the bolts with grade 8's and use anti-seize generously.

[acton mike]

The changing of the timing chain goes on

I got the water pump and harmonic balancer and timing cover off

there was enough slack in the timing chain that if you pinched the two sides of the chain between the sprockets they damn near touched

It is no wonder the truck was running like a sack of sh!!

It's a bloody marvel that it ran at all

Tomorrow I will make sure everything is timed properly and that it had not jumped a tooth and I will get the chain set on and set to buttoning it up

Once it is back together I hope for an improvement in the way it runs

It is some cold today and the garage is unheated

I must set out on a search for a rich widow with a heated garage

[fins2fuselage]

while doing the timing chain on my 318 I find myself falling victim oe the mightaswell syndrome - mightaswell change the waterpump while i am at it

Mike,

Some call this the "Zlongasya Whydontcha" syndrome -- as in "Zongasya gonna replace the timing chain, whydontcha replace the water pump too?"

Personally, I call it the "Snowball Effect" . . .

And good luck with the job -- by all means, make anti-seize your new best friend!

Jeff

[B-300]

I use teflon tape on the threads that go into coolant passages... The 4 long bolts that go thru the waterpump and one of the timing cover bolts on later engines. Teflon tape works best on the power steering pump bracket that needs adjusting now and then and keeps it from leaking. The rest get permatex along with both sides of the gaskets for no leaks.

[Speed Dragon]

Yeah teflon is a good idea. Maybe do the threads w/ teflon tape, and coat the rest w/ anti-seize just in case any water makes it past the threads, it'll help keep the bolt from rusting.

[fins2fuselage]

Yeah teflon is a good idea. Maybe do the threads w/ teflon tape, and coat the rest w/ anti-seize just in case any water makes it past the threads, it'll help keep the bolt from rusting.

Speed,

Good advice. Even without moisture, galvanic seizure can occur between the aluminum timing cover, the water pump (most replacements are aluminum) and the steel bolts -- yes, even in the unthreaded area which passes through the pump.

Jeff

[Megunticook]

Maybe do the threads w/ teflon tape, and coat the rest w/ anti-seize just in case any water makes it past the threads, it'll help keep the bolt from rusting.
I would use paste instead of tape--I've heard stories of people finding bits of tape in their coolant.

[Speed Dragon]

Well unless you drop a whole roll of it in there, I don't see it being a problem :)