Enuff · May 31, 2015

Did my p38 4l gems timing cover gasket today due to coolant leak and found Coolant leaking from main waterway into a long bolt hole in timing cover....then running down the cuetip in the picture, water stopped running out when drained to same level as end of bolt hole......gasket was tired so dont know what caused leak...

I'm thinking,
1. Design fault
2. Friday afternoon job
3. Whoever did it last used wrong sized bolt...and overtightened
4. Overheated and cracked
5. Just past it, generally
6, totally normal and they are all like that.
Any one come across this before and if a fault, is there a recognised cure.???
I'm thinking drain more out, allow to dry and refill bolt hole with rtv...and maybe fit a marine grade bolt wrapped in ptf tape. 😂

wammers · May 31, 2015

Enuff said:
Did my p38 4l gems timing cover gasket today due to coolant leak and found Coolant leaking from main waterway into a long bolt hole in timing cover....then running down the cuetip in the picture, water stopped running out when drained to same level as end of bolt hole......gasket was tired so dont know what caused leak...

I'm thinking,
1. Design fault
2. Friday afternoon job
3. Whoever did it last used wrong sized bolt...and overtightened
4. Overheated and cracked
5. Just past it, generally
6, totally normal and they are all like that.
Any one come across this before and if a fault, is there a recognised cure.???
I'm thinking drain more out, allow to dry and refill bolt hole with rtv...and maybe fit a marine grade bolt wrapped in ptf tape. ��

Wrong bolt may have been fitted a blown bottom of hole. Use Hylomar on threads of bolt on reassembly. Before case is assembled put Hylomar sparingly into hole, just enough to fill threads. Assemble case. Fill bolt threads with Hylomar allow solvent to evaporate, 30 mins, put a small bead around edge of bolt tip. Screw bolt in whilst bead of Hylomar is wet and secure bolt.

jacckk · Jun 1, 2015

I think it's normal. Mine certainly came out one of the bolt holes.

Story Wilson did a video on changing the P38 water pump and I'm sure I recall him saying to expect it come out of the bolt holes. https://www.youtube.com/watch?v=oRYoqas-hcI

PPP38vouge · Jun 1, 2015

Number 6,
Mine was the same when I did waterpump, once you reassemble it will be ok.

Saint.V8 · Jun 1, 2015

Thinking about it, I had water from the bolt holes on my GEMS too....

stopover · Jun 1, 2015

your timing chain looks loose? If you replace it get a 'tight' one. They come in two types.

MrGorsky · Jun 3, 2015

Saint.V8 said:
I had water from the bolt holes on my GEMS too....

Me too. I also replaced my timing chain with a tight one. No idea what it does though! The tight bit I mean, not the timing chain. I know what that does!

Saint.V8 · Jun 3, 2015

MrGorsky said:
Me too. I also replaced my timing chain with a tight one. No idea what it does though! The tight bit I mean, not the timing chain. I know what that does!

Stops chain slap....will still stretch over time mind....but it prevents the chain from whipping back and forth as it only bends one way!

Enuff

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