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2002 Focus ZX3 (Zetec) 95k miles (as of 05/2021;)
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Discussion Starter · #1 ·
Greetings,

I stripped the threads while replacing my water pump (as part of timing belt/water pump service).
I've helicoiled the threads.

Now I'm trying to find new bolts.
I've sourced m6-1 x14mm bolts, but the heads are 10mm instead of the original 8mm.

Will that cause any issues?
Or do I really need to find 8mm headed bolts?
 

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Greetings,

I stripped the threads while replacing my water pump (as part of timing belt/water pump service).
I've helicoiled the threads.

Now I'm trying to find new bolts.
I've sourced m6-1 x14mm bolts, but the heads are 10mm instead of the original 8mm.

Will that cause any issues?
Or do I really need to find 8mm headed bolts?
The size of the bolt head doesnt matter as long as any of it isnt interfering with normal operation. And at this point the helicoil or tapping new threads is your only option anyways. So unless your willing to replace the head just for that one stripped hole... I think your fine.
 

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Make sure the pump pulley clears bolt heads, thinking that may be the issue there.

The 8 mm. head makes it a specialty Ford bolt, the normal head on a 6 mm. shank bolt is 10 mm.
 

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Make sure the pump pulley clears bolt heads, thinking that may be the issue there.

The 8 mm. head makes it a specialty Ford bolt, the normal head on a 6 mm. shank bolt is 10 mm.
Hey question for you since u popped in. Speaking about cooling systems. Have you ever used one if those aftermarket aluminum thermostats by chance and if you would recomend them?
 

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2002 Focus ZX3 (Zetec) 95k miles (as of 05/2021;)
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Discussion Starter · #5 ·
Make sure the pump pulley clears bolt heads, thinking that may be the issue there.

The 8 mm. head makes it a specialty Ford bolt, the normal head on a 6 mm. shank bolt is 10 mm.
Thanks! I'm back on this today, so I'll know soon.
Fingers crossed I don't have to track down a "special" bolt..
Cars been off the road for a few weeks because I don't have that many opportunities to work on it, and I keep having to wait for items I order to move forward..
 

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They are flange head bolts - dealer or junk yard:
Automotive tire Motor vehicle Automotive lighting Automotive exterior Automotive wheel system


What happened to the original bolts?

Paul
 

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I'd prefer to get scrapyard bolts too but if not available I wouldn't hesitate to use 10 mm. head ones, the molded in circle under head won't be quite as big as the flange on the 8 but it WILL work there, that is not a real high torque point. I'd be careful to establish the correct exact length.
 

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2002 Focus ZX3 (Zetec) 95k miles (as of 05/2021;)
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Discussion Starter · #8 ·
The 10mm head bolts fit. The clear the lower timing belt cover and the pulley.

I used M6-1x16mm class 8.8 (flange head). I measured and the holes are 20mm deep.
Original bolts are M6-1x14mm (flange head) Class 8.8
The original bolts stripped the threads, so I tapped and helicoiled.
I figured it wouldn't be wise to reuse the bolts which stripped the threads in the block.
 

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The original bolts stripped the threads, so I tapped and helicoiled.
I figured it wouldn't be wise to reuse the bolts which stripped the threads in the block.
The water pump doesnt bolt to the block. It bolts to an aluminum housing that bolts to the block and seals with a single o-ring. That part is fairly easy to change out.

Paul
 
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Its an 8505 core but I think that one is for a Escort Zetec which is different.

I thought you repaired it with helicoils anyways.

Paul
 

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F8CZ-8505-TG
That is definately for an Escort which has a different cooling system and is not right for a Focus Zetec. See the smaller water port on the back near the large port for the radiator hose - Focus doesnt have that.

Im fairly certain the Focus part is obsolete from Ford - you would need to get it from a junkyard, etc.

Paul
 
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