I generally do not recommend *any* aftermarket parts for the 2.7 water pump and chain tensioner because not many (or maybe no
) aftermarket 2.7 water pumps are of the later design, which has beefier bearings
and do not use the rubber o-ring molded to the thick metal spacer - the two primary failure areas of the 2.7 water pump. Aftermarket "brands" generally buy whichever maker gives them the best deal at each purchase point, so you can't count on getting the type they show in their photos (maybe you can in certain "brands", but how do you know? - and quality may suck anyway).
(BTW - you can't mix and match the new-design thin gasket with the water pump of old or new design that came with the thick gasket
, and vice-versa, because the pump is made a different thickness depending on which gasket it comes with. If you do mix them (1) it will warp your timing cover (due to improper spacing off the front of the engine) so it won't seal against the engine - and oil will go everywhere, and your water pump sprocket will not be in plane with all the other sprockets - disaster waiting to happen. Be sure to remove the old gasket - if you don't know it's there, it looks like it's part of the engine block - if you leave it in place and add the new gasket you'll have the same problems as with the wrong thickness gasket - only worse.)
There have been so many threads on here about aftermarket 2.7 chain tensioners either being bad right out of the box or failing very soon after installation that I wouldn't trust any of them. Also, the design of the chain tensioner
was changed sometime in the middle of the LH production - after '99, not sure which year, and they changed the design of the head details on how the tensioner attaches. So the tensioner in that kit won't fit on your '99 engine - you need the earlier design tensioner (again - get only the Chrysler part).
You will need new camshaft and crank sprockets to match the chain pitch. I see they are in aftermarket - probably safe to trust them for those. And the left camshaft sprocket will have to have the SBEC tone wheel
. So many things to think of in mixing and matching the non-interchangeable design change parts.
So - here's a summary of what you have to do (some things are my preferences/recomendations, some are mandatory due to incompatible design details):
• Water pump of the later beefier design with later-design gasket and with the sprocket for the later-design chain - OEM only.
• Chain (and camshaft and crankshaft sprockets) of later design (you maybe can trust aftermarket for the chain, but if you can get the Chrysler kit that includes new-design chain and sprockets but with SBEC tone wheel
to work with your '99 engine, that would be the best deal. (I believe when I got the chain-upgrade kit (several years ago), the water pump and tensioner were not included - had to purchase them separately - that may have changed. Kit included the tensioner arm and chain guide.)
• Old-design tensioner - a must for your '99 engine - OEM only.
• Should replace the timing cover gasket and front main crank seal - aftermarket OK - prefer Felpro kit that includes both.
• Re-use the original secondary chains and tensioner - I don't believe I've ever heard/read of them failing.
• Consider replacing the valve stem seals - Felpro or OEM - inexpensive, but a bit of added labor. They are known for embrittling/wearing out between 100k and 150k miles, and when they do, your engine will be pumping thick smoke out the exhaust at startup and when accelerating, and your oil usage will go *way* up. Ask me how I know. Now's the time to do it while you've got other things in the area apart.
• You might consider installing the aftermarket chain "Stop Block" kit - around $30 on ebay. It limits how far back the tensioner arm can go if the tensioner were to fail to prevent the chain from skipping teeth and crashing your valves. Dan (Daytrepper) doesn't think the kit has much value - we just have a difference of opinion, and I can't swear 100% that I'm right about it. But I see it as cheap insurance if the tensioner collapses.
Did I forget anything? You'll find out!!