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Re: Waterpump for Ford 3.5V6 [Re: bullwinkle] #5005346
02/08/19 11:19 PM
02/08/19 11:19 PM
Joined: Dec 2013
Posts: 2,971
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline

Joined: Dec 2013
Posts: 2,971
Fort Worth, Texas
Originally Posted by bullwinkle
Does it make any rattling noises at startup? I understand the WP replacement, but I’m not sure I would do the chain unless something is wrong with it. My MGM could use one, but I would have to buy the special cam locator tools & crankshaft holder tool to do it-& I’ve heard a lot of 4.6s sound a lot worse than mine! crazy



No special tools needed for 2V Mod engines, Do everything with the crankshaft keyway a 12:00.....All pistons will be down in the bores enough that there is no possibility of piston to valve contact. The "colored" timing chain links won't be exactly where the FSM show them....But once installed, Rotate the crank counter clockwise to where the keyway is at 11:00 & it will match the FSM exactly!!!

Some Mod engines have bolt-on cam gears & some have Press-on cam gears, With the press-on style.......Use a pair of medium sized curved jaw Vice-grips to control the camshafts while you remove & reinstall the chains. The cam tube is hollow, Don't go crazy with the vice-grip clamping!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Waterpump for Ford 3.5V6 [Re: caprice_2nv] #5005365
02/09/19 12:09 AM
02/09/19 12:09 AM
Joined: Dec 2013
Posts: 2,971
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline

Joined: Dec 2013
Posts: 2,971
Fort Worth, Texas
Originally Posted by caprice_2nv
Well we will find out when I take it apart I guess. It could have been done years before I bought it (the previous owner didn't) at 165k miles.

Garak on this site has experience with a fleet of cabs, lot of them with this engine and he doesn't recall having any timing chain issues.

Lots of them went over 200k. Most that did fail wore through the timing cover before jumping.

One of my previous Caprices was an 87 with the Olds 307. I replaced it's timing chain at 160k miles and it had some stretch but the original nylon gears were still intact with some minor stress cracking starting. I hear lots of people say they only went 80k but in my experience that hasn't been the case. My friend who was a ford mechanic back in the 80s said a lot of Ford's were wear out by that mileage but it doesn't seem to be the case for the Chevy or Olds engines.


Quite an interesting subject, And I would like to apologize to KGMtech for derailing his thread!

Oldsmobile engines are a totally different design, While I never worked at a Olds dealer.....I spent years at a Cadillac dealer. Cadillac used the 307 & 350 Olds in a few models during my tenure & did customer-pay service work on 368, 425, & 500 Cadillac's quite a bit.
ALL these engine used nylon clad aluminum cam gears & didn't have near the failure rate as the small block Chevrolet! I don't know exactly why that was? Harmonics, Different oiling, Different materials etc? People like to lump all GM engineering into one, That is more true now but wasn't years ago.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Waterpump for Ford 3.5V6 [Re: KGMtech] #5005854
02/09/19 03:09 PM
02/09/19 03:09 PM
Joined: Dec 2005
Posts: 863
Ontario Canada
caprice_2nv Offline
caprice_2nv  Offline

Joined: Dec 2005
Posts: 863
Ontario Canada
Sent PM to you clinebarger, instead of staying off topic. I personally haven't seen a timing chain issue on any of the Chevy or olds engines I've owned or seen at work or owned by friends. All of the ones I've seen were well maintained though judging by the lack of sludge under the valve covers on all of them.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Waterpump for Ford 3.5V6 [Re: KGMtech] #5008222
02/11/19 06:40 PM
02/11/19 06:40 PM
Joined: Dec 2005
Posts: 863
Ontario Canada
caprice_2nv Offline
caprice_2nv  Offline

Joined: Dec 2005
Posts: 863
Ontario Canada
I stopped in at the garage I used to work at to get some hose for the catch can I installed on my Caprice and my friend told me I needed to hear an engine they had in. It was a 2011ish f150 with the 3.7. Main bearing knock and oil full of coolant. I assumed water pump but it turned out to be bubbling and popping in the coolant reservoir also, so looks like a head gasket probably. Only 60k miles on it, going to probably be a $7000 engine replacement or something insane like that. Luckily it's not very common as far as I know.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
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